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<P><B><FONT size=3D6>15 Backup and Recovery</FONT></B></P>
<HR>

<TABLE id=3Dtable1 cellSpacing=3D1 width=3D"100%" border=3D0>
  <TBODY>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">001</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">Backup =
and <SPAN=20
      style=3D"BACKGROUND-COLOR: #ffff00">recovery</SPAN> procedures =
protect your=20
      database against data loss and reconstruct the data, should loss =
occur.=20
      The reconstructing of data is achieved through media recovery, =
which=20
      refers to the various operations involved in <SPAN=20
      style=3D"BACKGROUND-COLOR: #ffff00">restoring</SPAN>, rolling =
forward, and=20
      rolling back a backup of database files. This chapter introduces =
concepts=20
      fundamental to designing a backup and recovery =
strategy.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft=20
      =
width=3D"48%">=B1=B8=B7=DD=A3=A8backup=A3=A9=BC=B0=BB=D6=B8=B4=A3=A8recov=
ery=A3=A9=B9=FD=B3=CC=C4=DC=B9=BB=B1=A3=BB=A4=CA=FD=BE=DD=BF=E2=A3=AC=B7=C0=
=D6=B9=CA=FD=BE=DD=B6=AA=CA=A7=A3=AC=B2=A2=D4=DA=D0=E8=D2=AA=CA=B1=D6=D8=BD=
=A8=CA=FD=BE=DD=A1=A3=D6=D8=BD=A8=CA=FD=BE=DD=CD=A8=B3=A3=CA=C7=CD=A8=B9=FD=
=BD=E9=D6=CA=BB=D6=B8=B4=A3=A8media=20
      =
recovery=A3=A9=CA=B5=CF=D6=B5=C4=A3=AC=BD=E9=D6=CA=BB=D6=B8=B4=CA=C7=D6=B8=
=C0=FB=D3=C3=B1=B8=B7=DD=B5=C4=CA=FD=BE=DD=BF=E2=CE=C4=BC=FE=CB=F9=D6=B4=D0=
=D0=B5=C4=B8=B4=D4=AD=A3=A8restoring=A3=A9=A3=AC=C7=B0=B9=F6=A3=A8rolling=
=20
      forward=A3=A9=A3=AC=BC=B0=BB=D8=B9=F6=A3=A8rolling =
back=A3=A9=B5=C8=D2=BB=CF=B5=C1=D0=B2=D9=D7=F7=A1=A3=B1=BE=D5=C2=BD=AB=BD=
=E9=C9=DC=C9=E8=BC=C6=B1=B8=B7=DD=BB=D6=B8=B4=B2=DF=C2=D4=CA=B1=D0=E8=D2=AA=
=D5=C6=CE=D5=B5=C4=BB=F9=B1=BE=B8=C5=C4=EE=A1=A3<BR>=A1=A1</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">002</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">This =
chapter=20
      contains the following topics:
      <UL>
        <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
        =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#e.15.1"=20
        target=3D_self>Introduction to Backup</A>=20
        <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
        =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#e.15.2"=20
        target=3D_self>Introduction to Recovery</A>=20
        <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
        =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#e.15.3"=20
        target=3D_self>Deciding Which Recovery Technique to Use</A>=20
        <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
        =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#e.15.4"=20
        target=3D_self>Flash Recovery Area</A> </LI></UL></TD>
    <TD vAlign=3Dtop align=3Dleft =
width=3D"48%">=B1=BE=D5=C2=B0=FC=BA=AC=D2=D4=CF=C2=D6=F7=CC=E2=A3=BA
      <UL>
        <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
        =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#c.15.1"=20
        target=3D_self>=B1=B8=B7=DD=BC=F2=BD=E9</A>=20
        <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
        =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#c.15.2"=20
        target=3D_self>=BB=D6=B8=B4=BC=F2=BD=E9</A>=20
        <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
        =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#c.15.3"=20
        =
target=3D_self>=C8=E7=BA=CE=D1=A1=D4=F1=CA=CA=B5=B1=B5=C4=BB=D6=B8=B4=B7=BD=
=CA=BD</A>=20
        <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
        =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#c.15.4"=20
        target=3D_self>Flash Recovery Area</A> </LI></UL></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">003</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">
      <BLOCKQUOTE>
        <P><B>See Also:</B></P>
        <UL>
          <LI style=3D"MARGIN-BOTTOM: 10px">"<A=20
          =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/01.Introduction%20to%20the%20Oracle%20Database.htm#e.1.2.3">=
Overview=20
          of Database Backup and Recovery Features</A>"=20
          <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
          =
href=3D"http://download-west.oracle.com/docs/cd/B19306_01/backup.102/b141=
92/toc.htm">Oracle=20
          Database Backup and Recovery Basics</A>=20
          <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
          =
href=3D"http://download-west.oracle.com/docs/cd/B19306_01/backup.102/b141=
91/toc.htm">Oracle=20
          Database Backup and Recovery Advanced User's Guide</A>=20
      </LI></UL></BLOCKQUOTE></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">
      <BLOCKQUOTE>
        <P><B>=C1=ED=BC=FB=A3=BA</B></P>
        <UL>
          <LI style=3D"MARGIN-BOTTOM: 10px">=A1=B0<A=20
          =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/01.Introduction%20to%20the%20Oracle%20Database.htm#c.1.2.3">=
=CA=FD=BE=DD=BF=E2=B1=B8=B7=DD=D3=EB=BB=D6=B8=B4=CC=D8=D0=D4=B8=C5=CA=F6<=
/A>=A1=B1=20

          <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
          =
href=3D"http://download-west.oracle.com/docs/cd/B19306_01/backup.102/b141=
92/toc.htm">Oracle=20
          Database Backup and Recovery Basics</A>=20
          <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
          =
href=3D"http://download-west.oracle.com/docs/cd/B19306_01/backup.102/b141=
91/toc.htm">Oracle=20
          Database Backup and Recovery Advanced User's Guide</A>=20
      </LI></UL></BLOCKQUOTE></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">004</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">
      <H1><A name=3De.15.1></A><SPAN style=3D"FONT-SIZE: =
20pt">Introduction to=20
      Backup</SPAN></H1></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">
      <H1><A name=3Dc.15.1></A><SPAN style=3D"FONT-SIZE: 20pt">15.1=20
    =B1=B8=B7=DD=BC=F2=BD=E9</SPAN></H1></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">005</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">A =
backup is a copy=20
      of data. This copy can include important parts of the database, =
such as=20
      the control file and datafiles. A backup is a safeguard against =
unexpected=20
      data loss and application errors. If you lose the original data, =
then you=20
      can reconstruct it by using a backup.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft =
width=3D"48%">=B1=B8=B7=DD=A3=A8backup=A3=A9=CA=C7=CA=FD=BE=DD=B5=C4=D2=BB=
=B8=F6=B8=B1=B1=BE=A3=A8copy of=20
      =
data=A3=A9=A1=A3=D5=E2=B8=F6=B8=B1=B1=BE=D6=D0=CD=A8=B3=A3=B0=FC=BA=AC=CA=
=FD=BE=DD=BF=E2=B5=C4=D6=D8=D2=AA=D7=E9=B3=C9=B2=BF=B7=D6=A3=AC=C0=FD=C8=E7=
=BF=D8=D6=C6=CE=C4=BC=FE=A3=A8control=20
      =
file=A3=A9=BC=B0=CA=FD=BE=DD=CE=C4=BC=FE=A3=A8datafile=A3=A9=B5=C8=A1=A3=B1=
=B8=B7=DD=C4=DC=B9=BB=BC=F5=C9=D9=B2=BB=BF=C9=D4=A4=BC=FB=B5=C4=CA=FD=BE=DD=
=B6=AA=CA=A7=BB=F2=D3=A6=D3=C3=B3=CC=D0=F2=B4=ED=CE=F3=D4=EC=B3=C9=B5=C4=CB=
=F0=CA=A7=A1=A3=C8=E7=B9=FB=D4=AD=CA=BC=CA=FD=BE=DD=B6=AA=CA=A7=A3=AC=D3=C3=
=BB=A7=BF=C9=D2=D4=CA=B9=D3=C3=B1=B8=B7=DD=D6=D8=BD=A8=CA=FD=BE=DD=A1=A3<=
BR>=A1=A1</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">006</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"48%">Backups are divided=20
      into physical backups and logical backups. Physical backups, which =
are the=20
      primary concern in a backup and recovery strategy, are copies of =
physical=20
      database files. You can make physical backups with either the =
Recovery=20
      Manager (RMAN) utility or operating system utilities. In contrast, =
logical=20
      backups contain logical data (for example, tables and stored =
procedures)=20
      extracted with an Oracle utility and stored in a binary file. You =
can use=20
      logical backups to supplement physical backups.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft =
width=3D"48%">=B1=B8=B7=DD=B7=D6=CE=AA=CE=EF=C0=ED=B1=B8=B7=DD=A3=A8physi=
cal=20
      backup=A3=A9=BC=B0=C2=DF=BC=AD=B1=B8=B7=DD=A3=A8logical =
backup=A3=A9=A1=A3=CE=EF=C0=ED=B1=B8=B7=DD=D6=B8=CE=EF=C0=ED=CA=FD=BE=DD=BF=
=E2=CE=C4=BC=FE=B5=C4=B8=B1=B1=BE=A3=AC=CE=EF=C0=ED=B1=B8=B7=DD=CA=C7=B1=B8=
=B7=DD=BB=D6=B8=B4=B2=DF=C2=D4=B5=C4=D6=F7=CC=E5=A1=A3=D3=C3=BB=A7=BF=C9=D2=
=D4=CA=B9=D3=C3=20
      Recovery =
Manager=A3=A8RMAN=A3=A9=BB=F2=B2=D9=D7=F7=CF=B5=CD=B3=B9=A4=BE=DF=BD=F8=D0=
=D0=CE=EF=C0=ED=B1=B8=B7=DD=A1=A3=D3=EB=CE=EF=C0=ED=B1=B8=B7=DD=CF=E0=B6=D4=
=B5=C4=CA=C7=C2=DF=BC=AD=B1=B8=B7=DD=A3=AC=D5=E2=D6=D6=B1=B8=B7=DD=B7=BD=CA=
=BD=CA=B9=D3=C3 Oracle=20
      =
=B9=A4=BE=DF=B3=E9=C8=A1=C2=DF=BC=AD=CA=FD=BE=DD=A3=A8=C0=FD=C8=E7=A3=AC=B1=
=ED=BB=F2=B4=E6=B4=A2=B9=FD=B3=CC=A3=A9=B2=A2=B1=A3=B4=E6=D4=DA=B6=FE=BD=F8=
=D6=C6=CE=C4=BC=FE=D6=D0=A1=A3=C2=DF=BC=AD=B1=B8=B7=DD=BF=C9=D2=D4=D7=F7=CE=
=AA=CE=EF=C0=ED=B1=B8=B7=DD=B5=C4=B2=B9=B3=E4=A1=A3<BR>=A1=A1</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">007</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">There =
are two ways=20
      to perform Oracle backup and recovery: Recovery Manager and =
user-managed=20
      backup and recovery.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">=BD=F8=D0=D0 Oracle =
=B1=B8=B7=DD=BB=D6=B8=B4=B5=C4=B7=BD=CA=BD=D3=D0=C1=BD=D6=D6=A3=BA=CA=B9=D3=
=C3 Recovery=20
      Manager =
=BD=F8=D0=D0=B1=B8=B7=DD=BB=D6=B8=B4=A3=AC=BB=F2=CA=D6=B9=A4=B9=DC=C0=ED=A3=
=A8user-managed=A3=A9=B5=C4=B1=B8=B7=DD=BB=D6=B8=B4=A1=A3<BR>=A1=A1</TD><=
/TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">008</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%"><A=20
      =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/a">Recovery=20
      Manager (RMAN)</A> is an Oracle utility that can back up, restore, =
and=20
      recover database files. It is a feature of the Oracle database =
server and=20
      does not require separate installation.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%"><A=20
      =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/a">Recovery=20
      Manager (RMAN)</A> =CA=C7=D3=C3=D3=DA=B1=B8=B7=DD=A3=A8back =
up=A3=A9=A3=AC=B8=B4=D4=AD=A3=A8restore=A3=A9=A3=AC=BC=B0=BB=D6=B8=B4=A3=A8=
recover=A3=A9=CA=FD=BE=DD=BF=E2=CE=C4=BC=FE=B5=C4 Oracle=20
      =B9=A4=BE=DF=A1=A3RMAN =CA=C7 Oracle =
=CA=FD=BE=DD=BF=E2=B5=C4=C4=DA=D6=C3=B9=A4=BE=DF=A3=AC=CE=DE=D0=EB=B5=A5=B6=
=C0=B0=B2=D7=B0=A1=A3<BR>=A1=A1</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">009</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">You =
can also use=20
      operating system commands for backups and SQL*Plus for recovery. =
This=20
      method, also called user-managed backup and recovery, is fully =
supported=20
      by Oracle, although use of RMAN is highly recommended because it =
is more=20
      robust and greatly simplifies administration.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft =
width=3D"48%">=D3=C3=BB=A7=D2=B2=BF=C9=D2=D4=CA=B9=D3=C3=B2=D9=D7=F7=CF=B5=
=CD=B3=C3=FC=C1=EE=BD=F8=D0=D0=B1=B8=B7=DD=A3=AC=B2=A2=CA=B9=D3=C3 =
SQL*Plus=20
      =
=BD=F8=D0=D0=BB=D6=B8=B4=A1=A3=D5=E2=D6=D6=B7=BD=CA=BD=B1=BB=B3=C6=CE=AA=CA=
=D6=B9=A4=B9=DC=C0=ED=B5=C4=B1=B8=B7=DD=BB=D6=B8=B4=A1=A3Oracle =
=CD=AC=CA=B1=D6=A7=B3=D6=C9=CF=CA=F6=C1=BD=D6=D6=B7=BD=CA=BD=A3=AC=B5=AB=C7=
=BF=C1=D2=BD=A8=D2=E9=B2=C9=D3=C3 RMAN=A3=AC=D2=F2=CE=AA=B2=C9=D3=C3 =
RMAN=20
      =
=B5=C4=B1=B8=B7=DD=BB=D6=B8=B4=B7=BD=CA=BD=B8=FC=CE=AA=BD=A1=D7=B3=A3=AC=C7=
=D2=C4=DC=B9=BB=BC=AB=B4=F3=B5=D8=BC=F2=BB=AF=B1=B8=B7=DD=BB=D6=B8=B4=B5=C4=
=B9=DC=C0=ED=B9=A4=D7=F7=A1=A3<BR>=A1=A1</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">010</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"48%">Whether you use RMAN=20
      or user-managed methods, you can supplement your physical backups =
with=20
      logical backups of schema objects made using the Export utility. =
The=20
      utility writes data from an Oracle database to binary operating =
system=20
      files. You can later use Import to restore this data into a=20
    database.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft =
width=3D"48%">=CE=DE=C2=DB=D3=C3=BB=A7=B2=C9=D3=C3 RMAN =
=BB=F2=CA=D6=B9=A4=B9=DC=C0=ED=B5=C4=B1=B8=B7=DD=BB=D6=B8=B4=A3=AC=B6=BC=BF=
=C9=D2=D4=CA=B9=D3=C3 Export=20
      =
utility=A3=A8=B5=BC=B3=F6=B9=A4=BE=DF=A3=A9=B6=D4=B7=BD=B0=B8=B6=D4=CF=F3=
=A3=A8schema =
object=A3=A9=BD=F8=D0=D0=C2=DF=BC=AD=B1=B8=B7=DD=A3=AC=D7=F7=CE=AA=CE=EF=C0=
=ED=B1=B8=B7=DD=B5=C4=B2=B9=B3=E4=A1=A3Export =C4=DC=B9=BB=BD=AB Oracle=20
      =
=CA=FD=BE=DD=BF=E2=C4=DA=B5=C4=CA=FD=BE=DD=D0=B4=C8=EB=B6=FE=BD=F8=D6=C6=B5=
=C4=B2=D9=D7=F7=CF=B5=CD=B3=CE=C4=BC=FE=A1=A3=D3=C3=BB=A7=BF=C9=D2=D4=CA=B9=
=D3=C3 Import =
utility=A3=A8=B5=BC=C8=EB=B9=A4=BE=DF=A3=A9=BD=AB=CA=FD=BE=DD=BB=D6=B8=B4=
=B5=BD=CA=FD=BE=DD=BF=E2=D6=D0=A1=A3<BR>=A1=A1</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">011</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">This =
section=20
      contains the following topics:
      <UL>
        <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
        =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#e.15.1.1"=20
        target=3D_self>Consistent and Inconsistent Backups</A>=20
        <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
        =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#e.15.1.2"=20
        target=3D_self><SPAN style=3D"BACKGROUND-COLOR: #ffff00">Whole =
Database and=20
        Partial Database Backups</SPAN></A>=20
        <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
        =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#e.15.1.3"=20
        target=3D_self>RMAN and User-Managed Backups</A> </LI></UL></TD>
    <TD vAlign=3Dtop align=3Dleft =
width=3D"48%">=B1=BE=BD=DA=B0=FC=BA=AC=D2=D4=CF=C2=D6=F7=CC=E2=A3=BA
      <UL>
        <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
        =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#c.15.1.1"=20
        =
target=3D_self>=D2=BB=D6=C2=D0=D4=B1=B8=B7=DD=D3=EB=B7=C7=D2=BB=D6=C2=D0=D4=
=B1=B8=B7=DD</A>=20
        <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
        =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#c.15.1.2"=20
        =
target=3D_self>=CA=FD=BE=DD=BF=E2=CD=EA=C8=AB=B1=B8=B7=DD=D3=EB=CA=FD=BE=DD=
=BF=E2=B2=BF=B7=D6=B1=B8=B7=DD</A>=20
        <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
        =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#c.15.1.3"=20
        target=3D_self>RMAN =
=B1=B8=B7=DD=D3=EB=CA=D6=B9=A4=B9=DC=C0=ED=B1=B8=B7=DD</A> =
</LI></UL></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">012</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">
      <BLOCKQUOTE><B>See Also:</B><BR><BR>"<A=20
        =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#e.15.3.4"=20
        target=3D_self>When to Use Import/Export Utilities Recovery</A>" =
for=20
        information on logical backups</BLOCKQUOTE></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">
      <BLOCKQUOTE><B>=C1=ED=BC=D3=A3=BA</B><BR><BR>=A1=B0<A=20
        =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/c.15.3.4">=BA=CE=CA=B1=B2=C9=D3=C3=20
        Import/Export =
=B9=A4=BE=DF=BB=D6=B8=B4</A>=A1=B1=C1=CB=BD=E2=B9=D8=D3=DA=C2=DF=BC=AD=B1=
=B8=B7=DD=B5=C4=D0=C5=CF=A2</BLOCKQUOTE></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">013</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">
      <H2><A name=3De.15.1.1></A>Consistent and Inconsistent =
Backups</H2></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">
      <H2><A name=3Dc.15.1.1></A>15.1.1 =
=D2=BB=D6=C2=D0=D4=B1=B8=B7=DD=D3=EB=B7=C7=D2=BB=D6=C2=D0=D4=B1=B8=B7=DD<=
/H2></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">014</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">A =
consistent backup=20
      is one in which the files being backed up contain all changes up =
to the=20
      same <A=20
      =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/a">system=20
      change number (SCN)</A>. This means that the files in the backup =
contain=20
      all the data taken from a same point in time. Unlike an =
inconsistent=20
      backup, a consistent whole database backup does not require =
recovery after=20
      it is restored.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft =
width=3D"48%">=D2=BB=D6=C2=D0=D4=B1=B8=B7=DD=A3=A8consistent=20
      =
backup=A3=A9=B5=C4=BA=AC=D2=E5=CA=C7=A3=AC=B1=B8=B7=DD=CB=F9=B0=FC=BA=AC=B5=
=C4=B8=F7=B8=F6=CE=C4=BC=FE=D6=D0=B5=C4=CB=F9=D3=D0=D0=DE=B8=C4=B6=BC=BE=DF=
=B1=B8=CF=E0=CD=AC=B5=C4<A=20
      =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/a">=CF=B5=CD=B3=B1=E4=BB=AF=B1=E0=BA=C5</A>=A3=A8system=20
      change =
number=A3=ACSCN=A3=A9=A1=A3=D2=B2=BE=CD=CA=C7=CB=B5=A3=AC=B1=B8=B7=DD=CB=F9=
=B0=FC=BA=AC=B5=C4=B8=F7=B8=F6=CE=C4=BC=FE=D6=D0=B5=C4=CB=F9=D3=D0=CA=FD=BE=
=DD=BE=F9=C0=B4=D7=D4=CD=AC=D2=BB=CA=B1=BC=E4=B5=E3=A1=A3=D3=EB=B7=C7=D2=BB=
=D6=C2=D0=D4=B1=B8=B7=DD=A3=A8inconsistent=20
      =
backup=A3=A9=B2=BB=CD=AC=A3=AC=CA=B9=D3=C3=D2=BB=D6=C2=D0=D4=CA=FD=BE=DD=BF=
=E2=CD=EA=C8=AB=B1=B8=B7=DD=A3=A8consistent whole database=20
      =
backup=A3=A9=BD=F8=D0=D0=B8=B4=D4=AD=A3=A8restore=A3=A9=BA=F3=A3=AC=B2=BB=
=D0=E8=D2=AA=D6=B4=D0=D0=BB=D6=B8=B4=B2=D9=D7=F7=A3=A8recovery=A3=A9=A1=A3=
<BR>=A1=A1</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">015</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">An =
inconsistent=20
      backup is a backup of one or more database files that you make =
while the=20
      database is open or after the database has shut down =
abnormally.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft=20
      =
width=3D"48%">=B7=C7=D2=BB=D6=C2=D0=D4=B1=B8=B7=DD=D6=B8=A3=AC=D4=DA=CA=FD=
=BE=DD=BF=E2=B4=A6=D3=DA=B4=F2=BF=AA=A3=A8open=A3=A9=D7=B4=CC=AC=CA=B1=A3=
=AC=BB=F2=CA=FD=BE=DD=BF=E2=D2=EC=B3=A3=B9=D8=B1=D5=A3=A8shut down=20
      =
abnormally=A3=A9=BA=F3=A3=AC=B6=D4=D2=BB=B8=F6=BB=F2=B6=E0=B8=F6=CA=FD=BE=
=DD=BF=E2=CE=C4=BC=FE=BD=F8=D0=D0=B5=C4=B1=B8=B7=DD=A1=A3<BR>=A1=A1</TD><=
/TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">016</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">
      <H3><A name=3De.15.1.1.1></A>Overview of Consistent =
Backups</H3></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">
      <H3><A name=3Dc.15.1.1.1></A>15.1.1.1 =
=D2=BB=D6=C2=D0=D4=B1=B8=B7=DD=B8=C5=CA=F6</H3></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">017</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">A =
consistent backup=20
      of a database or part of a database is a backup in which all =
read/write=20
      datafiles and control files are checkpointed with the same =
SCN.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft =
width=3D"48%">=B6=D4=CA=FD=BE=DD=BF=E2=D5=FB=CC=E5=BB=F2=B2=BF=B7=D6=BD=F8=
=D0=D0=B5=C4=D2=BB=D6=C2=D0=D4=B1=B8=B7=DD=A3=A8consistent=20
      =
backup=A3=A9=BA=F3=A3=AC=B1=B8=B7=DD=D6=D0=CB=F9=D3=D0=CA=FD=BE=DD=CE=C4=BC=
=FE=A3=A8datafile=A3=A9=BC=B0=BF=D8=D6=C6=CE=C4=BC=FE=A3=A8control =
file=A3=A9=B6=BC=BE=AD=C0=FA=B9=FD=BC=EC=B2=E9=B5=E3=A3=A8checkpoint=A3=A9=
=A3=AC=D3=B5=D3=D0=CF=E0=CD=AC=B5=C4=20
      SCN=A1=A3<BR>=A1=A1</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">018</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">The =
only way to make=20
      a consistent whole database backup is to shut down the database =
with the=20
      <FONT color=3D#0000ff>NORMAL</FONT>, <FONT =
color=3D#0000ff>IMMEDIATE</FONT>,=20
      or <FONT color=3D#0000ff>TRANSACTIONAL</FONT> options and make the =
backup=20
      while the database is closed. If a database is not shut down =
cleanly, for=20
      example, an instance fails or you issue a <FONT =
color=3D#0000ff>SHUTDOWN=20
      ABORT</FONT> statement, then the database's datafiles are always=20
      inconsistent=A1=AAunless the database is a <A=20
      =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/a">read-only=20
      database</A>.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft =
width=3D"48%">=BD=F8=D0=D0=D2=BB=D6=C2=D0=D4=CA=FD=BE=DD=BF=E2=CD=EA=C8=AB=
=B1=B8=B7=DD=A3=A8consistent whole=20
      database =
backup=A3=A9=B5=C4=CE=A8=D2=BB=B7=BD=B7=A8=CA=C7=A3=BA=CA=D7=CF=C8=CA=B9=D3=
=C3 <FONT color=3D#0000ff>NORMAL</FONT>=A3=AC<FONT=20
      color=3D#0000ff>IMMEDIATE</FONT>=A3=AC=BB=F2 <FONT =
color=3D#0000ff>TRANSACTIONAL=20
      =
</FONT>=D1=A1=CF=EE=B9=D8=B1=D5=CA=FD=BE=DD=BF=E2=A3=AC=B2=A2=D4=DA=CA=FD=
=BE=DD=BF=E2=B4=A6=D3=DA=B9=D8=B1=D5=D7=B4=CC=AC=CA=B1=BD=F8=D0=D0=B1=B8=B7=
=DD=A1=A3=C8=E7=B9=FB=CA=FD=BE=DD=BF=E2=C3=BB=D3=D0=CD=EA=C8=AB=B9=D8=B1=D5=
=A3=AC=C0=FD=C8=E7=B3=F6=CF=D6=CA=B5=C0=FD=B9=CA=D5=CF=A3=AC=BB=F2=D3=C3=BB=
=A7=CA=B9=D3=C3=C1=CB <FONT=20
      color=3D#0000ff>SHUTDOWN ABORT</FONT> =
=D3=EF=BE=E4=A3=AC=B4=CB=CA=B1=CA=FD=BE=DD=BF=E2=B5=C4=CA=FD=BE=DD=CE=C4=BC=
=FE=CA=C7=B7=C7=D2=BB=D6=C2=D0=D4=B5=C4=A3=AC=B3=FD=B7=C7=B4=CB=CA=FD=BE=DD=
=BF=E2=CE=AA<A=20
      =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/a">=D6=BB=B6=C1=CA=FD=BE=DD=BF=E2</A>=A3=A8read-only=20
      database=A3=A9=A1=A3<BR>=A1=A1</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">019</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">Oracle =
makes the=20
      control files and datafiles consistent to the same SCN during a =
database=20
      <A=20
      =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/a">checkpoint</A>.=20
      The only tablespaces in a consistent backup that are allowed to =
have older=20
      SCNs are read-only and offline normal tablespaces, which are still =

      consistent with the other datafiles in the backup because no =
changes have=20
      been made to them.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">Oracle =
=CD=A8=B9=FD=CA=FD=BE=DD=BF=E2<A=20
      =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/a">=BC=EC=B2=E9=B5=E3</A>=B2=D9=D7=F7=CA=B9=CA=FD=BE=DD=CE=C4=
=BC=FE=BA=CD=BF=D8=D6=C6=CE=C4=BC=FE=D3=B5=D3=D0=CF=E0=CD=AC=B5=C4=20
      =
SCN=A3=AC=BC=B4=BE=DF=B1=B8=D2=BB=D6=C2=D0=D4=A1=A3=D4=DA=D2=BB=D6=C2=D0=D4=
=B1=B8=B7=DD=D6=D0=A3=AC=D6=BB=D3=D0=D6=BB=B6=C1=B1=ED=BF=D5=BC=E4=A3=A8r=
ead-only =
tablespace=A3=A9=BC=B0=CD=D1=BB=FA=B1=ED=BF=D5=BC=E4=A3=A8offline=20
      tablespace=A3=A9=B5=C4 SCN =
=BF=C9=D2=D4=B1=C8=B1=B8=B7=DD=D6=D0=C6=E4=CB=FB=CE=C4=BC=FE=B5=C4 SCN=20
  =
=D6=CD=BA=F3=A1=A3=D5=E2=C1=BD=D6=D6=B1=ED=BF=D5=BC=E4=C4=DA=B5=C4=CA=FD=BE=
=DD=B2=BB=BB=E1=B1=BB=D0=DE=B8=C4=A3=AC=D2=F2=B4=CB=CB=FD=C3=C7=D2=B2=C4=DC=
=C2=FA=D7=E3=D2=BB=D6=C2=D0=D4=B5=C4=D2=AA=C7=F3=A1=A3<BR>=A1=A1</TD></TR=
>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">020</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">The =
important point=20
      is that you can open the database after restoring a consistent =
whole=20
      database backup without needing recovery because the data is =
already=20
      consistent: no action is required to make the data in the restored =

      datafiles correct. Hence, you can restore a year-old consistent =
backup of=20
      your database without performing media recovery and without Oracle =

      performing instance recovery. Of course, when you restore a =
consistent=20
      whole database backup without applying redo, you lose all =
transactions=20
      that were made since the backup was taken.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft=20
      =
width=3D"48%">=D2=BB=D6=C2=D0=D4=CA=FD=BE=DD=BF=E2=CD=EA=C8=AB=B1=B8=B7=DD=
=B5=C4=D6=D8=D2=AA=CC=D8=B5=E3=CA=C7=A3=AC=CA=B9=D3=C3=B4=CB=D6=D6=B1=B8=B7=
=DD=B8=B4=D4=AD=A3=A8restore=A3=A9=B5=C4=CA=FD=BE=DD=BF=E2=CE=DE=D0=EB=BB=
=D6=B8=B4=A3=A8recovery=A3=A9=BC=B4=BF=C9=B4=F2=BF=AA=A3=A8open=A3=A9=A3=AC=
=D5=E2=CA=C7=D2=F2=CE=AA=B8=B4=D4=AD=B5=C4=CA=FD=BE=DD=BF=E2=BE=DF=B1=B8=D2=
=BB=D6=C2=D0=D4=A3=BA=B8=B4=D4=AD=B5=C4=CA=FD=BE=DD=CE=C4=BC=FE=C4=DA=B5=C4=
=CA=FD=BE=DD=CA=C7=D5=FD=C8=B7=B5=C4=A3=AC=CE=DE=D0=EB=D3=C3=BB=A7=BD=F8=D0=
=D0=C8=CE=BA=CE=20
      =
=B4=A6=C0=ED=A1=A3=D3=C3=BB=A7=BF=C9=D2=D4=CA=B9=D3=C3=D2=BB=C4=EA=C7=B0=B5=
=C4=D2=BB=D6=C2=D0=D4=B1=B8=B7=DD=B8=B4=D4=AD=CA=FD=BE=DD=BF=E2=A3=AC=B6=F8=
=CE=DE=D0=EB=BD=F8=D0=D0=BD=E9=D6=CA=BB=D6=B8=B4=A3=A8media =
recovery=A3=A9=A3=ACOracle=20
      =
=D2=B2=B2=BB=B1=D8=D6=B4=D0=D0=CA=B5=C0=FD=BB=D6=B8=B4=A3=A8instance =
recovery=A3=A9=A1=A3=B5=AB=CA=C7=A3=AC=C8=E7=B9=FB=CA=B9=D3=C3=D2=BB=D6=C2=
=D0=D4=B1=B8=B7=DD=B8=B4=D4=AD=CA=FD=BE=DD=BF=E2=B6=F8=C3=BB=D3=D0=D3=A6=D3=
=C3=D6=D8=D7=F6=C8=D5=D6=BE=A3=A8applying=20
      =
redo=A3=A9=A3=AC=B1=B8=B7=DD=D6=AE=BA=F3=B2=FA=C9=FA=B5=C4=CA=C2=CE=F1=BD=
=AB=C8=AB=B2=BF=B6=AA=CA=A7=A1=A3<BR>=A1=A1</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">021</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">A =
consistent whole=20
      database backup is the only valid backup option for databases =
operating in=20
      <FONT color=3D#0000ff>NOARCHIVELOG</FONT> mode, because otherwise =
recovery=20
      is necessary for consistency. In <FONT =
color=3D#0000ff>NOARCHIVELOG</FONT>=20
      mode, Oracle does not archive the redo logs, and so the required =
redo logs=20
      might not exist on disk. A consistent whole backup is also a valid =
backup=20
      option for databases operating in <FONT =
color=3D#0000ff>ARCHIVELOG</FONT>=20
      mode. When this type of backup is restored and archived logs are=20
      available, you have the option of either opening the database =
immediately=20
      and losing transactions that were made since the backup was taken, =
or=20
      applying the archived logs to recover those =
transactions.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft =
width=3D"48%">=C8=E7=B9=FB=CA=FD=BE=DD=BF=E2=D4=CB=D0=D0=D4=DA<FONT =
color=3D#0000ff>=20
      =
NOARCHIVELOG</FONT>=A3=A8=B7=C7=B9=E9=B5=B5=A3=A9=C4=A3=CA=BD=CF=C2=A3=AC=
=D2=BB=D6=C2=D0=D4=CA=FD=BE=DD=BF=E2=CD=EA=C8=AB=B1=B8=B7=DD=CA=C7=CE=A8=D2=
=BB=D3=D0=D0=A7=B5=C4=B1=B8=B7=DD=B7=BD=B0=B8=A3=AC=D2=F2=CE=AA=CA=B9=D3=C3=
=B7=C7=D2=BB=D6=C2=D0=D4=B1=B8=B7=DD=A3=A8inconsistent=20
      =
backup=A3=A9=B8=B4=D4=AD=CA=FD=BE=DD=BF=E2=BA=F3=D0=E8=D2=AA=D6=B4=D0=D0=BB=
=D6=B8=B4=B2=D9=D7=F7=C0=B4=C8=B7=B1=A3=CA=FD=BE=DD=D2=BB=D6=C2=D0=D4=A1=A3=
=D4=DA <FONT color=3D#0000ff>NOARCHIVELOG=20
      </FONT>=C4=A3=CA=BD=CF=C2=A3=ACOracle =
=B2=BB=BB=E1=B6=D4=D6=D8=D7=F6=C8=D5=D6=BE=BD=F8=D0=D0=B9=E9=B5=B5=A3=AC=D2=
=F2=B4=CB=BB=D6=B8=B4=CB=F9=D0=E8=B5=C4=D6=D8=D7=F6=C8=D5=D6=BE=BF=C9=C4=DC=
=D2=D1=BE=AD=B2=BB=B4=E6=D4=DA=C1=CB=A1=A3=B6=F8=D4=CB=D0=D0=D4=DA<FONT =
color=3D#0000ff>=20
      =
ARCHIVELOG</FONT>=A3=A8=B9=E9=B5=B5=A3=A9=C4=A3=CA=BD=CF=C2=B5=C4=CA=FD=BE=
=DD=BF=E2=A3=AC=BF=C9=D2=D4=B2=C9=D3=C3=D2=BB=D6=C2=D0=D4=CA=FD=BE=DD=BF=E2=
=CD=EA=C8=AB=B1=B8=B7=DD=A1=A3=B5=B1=CA=B9=D3=C3=B4=CB=D6=D6=B1=B8=B7=DD=B8=
=B4=D4=AD=CA=FD=BE=DD=BF=E2=BA=F3=A3=AC=D3=C3=BB=A7=BF=C9=D2=D4=C1=A2=BC=B4=
=B4=F2=BF=AA=CA=FD=BE=DD=BF=E2=A3=AC=CA=B9=B1=B8=B7=DD=BA=F3=B7=A2=C9=FA=B5=
=C4=CA=C2=CE=F1=C8=AB=B2=BF=B6=AA=CA=A7=A3=BB=C8=E7=B9=FB=B9=E9=B5=B5=B5=C4=
=D6=D8=D7=F6=C8=D5=D6=BE=B4=E6=D4=DA=A3=AC=D3=C3=BB=A7=D2=B2=BF=C9=D2=D4=D3=
=A6=D3=C3=D5=E2=D0=A9=C8=D5=D6=BE=B4=D3=B6=F8=BB=D6=B8=B4=B1=B8=B7=DD=BA=F3=
=B7=A2=C9=FA=B5=C4=CA=C2=CE=F1=A1=A3<BR>=A1=A1</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">022</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">
      <H3><A name=3De.15.1.1.2></A>Overview of Inconsistent =
Backups</H3></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">
      <H3><A name=3Dc.15.1.1.2></A>15.1.1.2 =
=B7=C7=D2=BB=D6=C2=D0=D4=B1=B8=B7=DD=B8=C5=CA=F6</H3></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">023</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">An =
inconsistent=20
      backup is a backup in which the files being backed up do not =
contain all=20
      the changes made at all the SCNs. In other words, some changes are =

      missing. This means that the files in the backup contain data =
taken from=20
      different points in time. This can occur because the datafiles are =
being=20
      modified as backups are being taken. Oracle recovery makes =
inconsistent=20
      backups consistent by reading all archived and online redo logs, =
starting=20
      with the earliest SCN in any of the datafile headers, and applying =
the=20
      changes from the logs back into the datafiles.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft =
width=3D"48%">=B7=C7=D2=BB=D6=C2=D0=D4=B1=B8=B7=DD=A3=A8inconsistent=20
      =
backup=A3=A9=B5=C4=BA=AC=D2=E5=CA=C7=A3=AC=B1=B8=B7=DD=CB=F9=B0=FC=BA=AC=B5=
=C4=B8=F7=B8=F6=CE=C4=BC=FE=D6=D0=B5=C4=CB=F9=D3=D0=D0=DE=B8=C4=B2=BB=BE=DF=
=B1=B8=CF=E0=CD=AC=B5=C4=CF=B5=CD=B3=B1=E4=BB=AF=B1=E0=BA=C5=A3=A8system =
change=20
      =
number=A3=ACSCN=A3=A9=A1=A3=BB=BB=BE=E4=BB=B0=CB=B5=A3=AC=D3=D0=D0=A9=D0=DE=
=B8=C4=D4=DA=B1=B8=B7=DD=D6=D0=B2=BB=B4=E6=D4=DA=A1=A3=D5=E2=D2=E2=CE=B6=D7=
=C5=B1=B8=B7=DD=CB=F9=B0=FC=BA=AC=B5=C4=B8=F7=B8=F6=CE=C4=BC=FE=D6=D0=B5=C4=
=CB=F9=D3=D0=CA=FD=BE=DD=C0=B4=D7=D4=B2=BB=CD=AC=B5=C4=CA=B1=BC=E4=B5=E3=A1=
=A3=C8=E7=B9=FB=CA=FD=BE=DD=CE=C4=BC=FE=D4=DA=B1=B8=B7=DD=B5=C4=CD=AC=CA=B1=
=D2=B2=D4=DA=B1=BB=D0=DE=B8=C4=BE=CD=BB=E1=B3=F6=CF=D6=C9=CF=CA=F6=C7=E9=BF=
=F6=A1=A3Oracle=20
      =
=B5=C4=BB=D6=B8=B4=A3=A8recovery=A3=A9=B2=D9=D7=F7=C4=DC=B9=BB=B1=C8=BD=CF=
=CB=F9=D3=D0=CA=FD=BE=DD=CE=C4=BC=FE=CD=B7=A3=A8datafile =
headers=A3=A9=D6=D0=B5=C4 SCN=A3=AC=D6=AE=BA=F3=D2=D4=D7=EE=D4=E7=B5=C4 =
SCN=20
      =
=CE=AA=C6=F0=B5=E3=B6=C1=C8=A1=B9=E9=B5=B5=BC=B0=C1=AA=BB=FA=D6=D8=D7=F6=C8=
=D5=D6=BE=CE=C4=BC=FE=A3=AC=B2=A2=BD=AB=C6=E4=D6=D0=B3=F6=B5=C4=CB=F9=D3=D0=
=D0=DE=B8=C4=D3=A6=D3=C3=B5=BD=B8=B4=D4=AD=B5=C4=CA=FD=BE=DD=CE=C4=BC=FE=D6=
=D0=A1=A3<BR>=A1=A1</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">024</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">If the =
database must=20
      be up and running 24 hours a day, seven days a week, then you have =
no=20
      choice but to perform inconsistent backups of the whole database. =
A backup=20
      of online datafiles is called an <A=20
      =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/a">online=20
      backup</A>. This requires that you run your database in <FONT=20
      color=3D#0000ff>ARCHIVELOG</FONT> mode.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft =
width=3D"48%">=C8=E7=B9=FB=CA=FD=BE=DD=BF=E2=B1=D8=D0=EB 24*7=20
      =
=B5=D8=B9=A4=D7=F7=A3=AC=B6=D4=D5=E2=D1=F9=B5=C4=CA=FD=BE=DD=BF=E2=D6=BB=C4=
=DC=BD=F8=D0=D0=B7=C7=D2=BB=D6=C2=D0=D4=CA=FD=BE=DD=BF=E2=CD=EA=C8=AB=B1=B8=
=B7=DD=A1=A3=C1=AA=BB=FA=CA=FD=BE=DD=CE=C4=BC=FE=B5=C4=B1=B8=B7=DD=B1=BB=B3=
=C6=CE=AA<A=20
      =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/a">=C1=AA=BB=FA=B1=B8=B7=DD</A>=A3=A8online=20
      =
backup=A3=A9=A1=A3=D0=E8=D2=AA=BD=F8=D0=D0=C1=AA=BB=FA=B1=B8=B7=DD=B5=C4=CA=
=FD=BE=DD=BF=E2=B1=D8=D0=EB=D4=CB=D0=D0=D4=DA<FONT color=3D#0000ff>=20
      =
ARCHIVELOG</FONT>=A3=A8=B9=E9=B5=B5=A3=A9=C4=A3=CA=BD=CF=C2=A1=A3<BR>=A1=A1=
</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">025</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">If you =
run the=20
      database in <FONT color=3D#0000ff>ARCHIVELOG</FONT> mode, then you =
do not=20
      have to back up the whole database at one time. For example, if =
your=20
      database contains seven tablespaces, and if you back up the =
control file=20
      as well as a different tablespace each night, then in a week you =
will back=20
      up all tablespaces in the database as well as the control file. =
You can=20
      consider this staggered backup as a whole database backup. =
However, if=20
      such a staggered backup must be restored, then you need to recover =
using=20
      all archived redo logs that were created since the earliest backup =
was=20
      taken.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft =
width=3D"48%">=C8=E7=B9=FB=CA=FD=BE=DD=BF=E2=D4=CB=D0=D0=D4=DA<FONT =
color=3D#0000ff>=20
      ARCHIVELOG=20
      =
</FONT>=C4=A3=CA=BD=CF=C2=A3=AC=D3=C3=BB=A7=B2=BB=B1=D8=C3=BF=B4=CE=B6=BC=
=BD=F8=D0=D0=CA=FD=BE=DD=BF=E2=CD=EA=C8=AB=B1=B8=B7=DD=A1=A3=C0=FD=C8=E7=A3=
=AC=C8=E7=B9=FB=CA=FD=BE=DD=BF=E2=B0=FC=BA=AC=C6=DF=B8=F6=B1=ED=BF=D5=BC=E4=
=A3=AC=D3=C3=BB=A7=C3=BF=CD=ED=B6=BC=B1=B8=B7=DD=BF=D8=D6=C6=CE=C4=BC=FE=BC=
=B0=D2=BB=B8=F6=B2=BB=CD=AC=B5=C4=B1=ED=BF=D5=BC=E4=A3=AC=C4=C7=C3=B4=D2=BB=
=D6=DC=BA=F3=D3=C3=BB=A7=BE=CD=D2=D1=BE=AD=B1=B8=B7=DD=C1=CB=CA=FD=BE=DD=BF=
=E2=B5=C4=C8=AB=B2=BF=B1=ED=BF=D5=BC=E4=BC=B0=BF=D8=D6=C6=CE=C4=BC=FE=A1=A3=
=D3=C3=BB=A7=BF=C9=D2=D4=B0=D1=D5=E2=B8=F6=BD=BB=B4=ED=B5=C4=B1=B8=B7=DD=D7=
=F7=CE=AA=CA=FD=BE=DD=BF=E2=CD=EA=C8=AB=B1=B8=B7=DD=A1=A3=C8=E7=B9=FB=D0=E8=
=D2=AA=CA=B9=D3=C3=D5=E2=B8=F6=BD=BB=B4=ED=B5=C4=B1=B8=B7=DD=20
      =
=BB=D6=B8=B4=CA=FD=BE=DD=BF=E2=A3=AC=B3=FD=C1=CB=B8=B4=D4=AD=CA=FD=BE=DD=D6=
=AE=CD=E2=A3=AC=D3=C3=BB=A7=BB=B9=D0=E8=D3=A6=D3=C3=D7=EE=D4=E7=B1=B8=B7=DD=
=CA=B1=BC=E4=D6=AE=BA=F3=B5=C4=B2=FA=C9=FA=CB=F9=D3=D0=B9=E9=B5=B5=D6=D8=D7=
=F6=C8=D5=D6=BE=A1=A3<BR>=A1=A1</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">026</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">
      <BLOCKQUOTE><B>Caution:</B><BR><BR>Oracle strongly recommends that =
you=20
        do not make inconsistent, closed database backups in <FONT=20
        color=3D#0000ff>NOARCHIVELOG</FONT> mode. If such a backup is =
used to=20
        restore the database, then data corruption might result. =
</BLOCKQUOTE></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">
      <BLOCKQUOTE><B>=BE=AF=B8=E6=A3=BA</B><BR><BR>Oracle =
=C7=BF=C1=D2=BD=A8=D2=E9=A3=AC=D4=CB=D0=D0=D4=DA <FONT=20
        color=3D#0000ff>NOARCHIVELOG=20
        =
</FONT>=C4=A3=CA=BD=CF=C2=B5=C4=CA=FD=BE=DD=BF=E2=B9=D8=B1=D5=BA=F3=B2=BB=
=D2=AA=BD=F8=D0=D0=B7=C7=D2=BB=D6=C2=D0=D4=B1=B8=B7=DD=A1=A3=C8=E7=B9=FB=D3=
=C3=D5=E2=D1=F9=B5=C4=B1=B8=B7=DD=B8=B4=D4=AD=CA=FD=BE=DD=BF=E2=D3=D0=BF=C9=
=C4=DC=D4=EC=B3=C9=CA=FD=BE=DD=CB=F0=BB=B5=A1=A3 </BLOCKQUOTE></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">027</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">
      <BLOCKQUOTE><B>See Also:</B><BR><BR><A=20
        =
href=3D"http://download-west.oracle.com/docs/cd/B19306_01/backup.102/b141=
91/toc.htm">Oracle=20
        Database Backup and Recovery Advanced User's Guide =
</A></BLOCKQUOTE></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">
      <BLOCKQUOTE><B>=C1=ED=BC=FB=A3=BA</B><BR><BR><A=20
        =
href=3D"http://download-west.oracle.com/docs/cd/B19306_01/backup.102/b141=
91/toc.htm">Oracle=20
        Database Backup and Recovery Advanced User's =
Guide</A></BLOCKQUOTE></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">028</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">
      <H4><A name=3De.15.1.1.2.1></A>Archiving Unarchived Redo Log =
Files</H4></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">
      <H4><A name=3Dc.15.1.1.2.1></A>15.1.1.2.1 =
=B6=D4=CE=B4=B9=E9=B5=B5=B5=C4=D6=D8=D7=F6=C8=D5=D6=BE=CE=C4=BC=FE=BD=F8=D0=
=D0=B9=E9=B5=B5</H4></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">029</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">After =
an <A=20
      =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/a">online=20
      backup</A> or inconsistent closed backup, always ensure that you =
have the=20
      redo necessary to recover the backup by archiving the unarchived =
redo=20
      logs.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">=D4=DA=BD=F8=D0=D0<A=20
      =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/a">=C1=AA=BB=FA=B1=B8=B7=DD</A>=A3=A8online=20
      =
backup=A3=A9=BA=F3=BB=F2=B9=D8=B1=D5=A3=A8close=A3=A9=CA=FD=BE=DD=BF=E2=BA=
=F3=BD=F8=D0=D0=B7=C7=D2=BB=D6=C2=D0=D4=B1=B8=B7=DD=A3=A8inconsistent=20
      =
backup=A3=A9=BA=F3=A3=AC=D2=BB=B6=A8=D2=AA=B9=E9=B5=B5=CE=B4=B9=E9=B5=B5=B5=
=C4=D6=D8=D7=F6=C8=D5=D6=BE=A3=AC=D2=D4=B1=A3=B4=E6=BB=D6=B8=B4=A3=A8reco=
ver=A3=A9=CB=F9=D0=E8=B5=C4=D6=D8=D7=F6=CA=FD=BE=DD=A1=A3<BR>=A1=A1</TD><=
/TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">030</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">
      <H4><A name=3De.15.1.1.2.2></A>Backing Up the Archived Logs and =
the Control=20
      File</H4></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">
      <H4><A name=3Dc.15.1.1.2.2></A>15.1.1.2.2 =
=B1=B8=B7=DD=B9=E9=B5=B5=C8=D5=D6=BE=CE=C4=BC=FE=BC=B0=BF=D8=D6=C6=CE=C4=BC=
=FE</H4></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">031</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%"><SPAN=20
      style=3D"BACKGROUND-COLOR: #ffff00">After open or inconsistent =
closed=20
      backups, Oracle recommends backing up all archived logs produced =
during=20
      the backup, and then backing up the control file after the backup=20
      completes. If you do not have all archived redo logs produced =
during the=20
      backup, then you cannot recover the backup because you do not have =
all the=20
      redo records necessary to make it =
consistent.<BR>=A1=A1</SPAN></TD>
    <TD vAlign=3Dtop align=3Dleft=20
      =
width=3D"48%">=D4=DA=BD=F8=D0=D0=C1=CB=B7=C7=D2=BB=D6=C2=D0=D4=B1=B8=B7=DD=
=BA=F3=A3=A8=CE=DE=C2=DB=B1=B8=B7=DD=CA=B1=CA=FD=BE=DD=BF=E2=CA=C7=B4=F2=BF=
=AA=A3=A8open=A3=A9=BB=F2=B9=D8=B1=D5=A3=A8close=A3=A9=D7=B4=CC=AC=A3=A9=A3=
=ACOracle=20
      =
=BD=A8=D2=E9=CA=D7=CF=C8=B6=D4=B7=C7=D2=BB=D6=C2=D0=D4=B1=B8=B7=DD=C6=DA=BC=
=E4=B2=FA=C9=FA=B5=C4=B9=E9=B5=B5=D6=D8=D7=F6=C8=D5=D6=BE=BD=F8=D0=D0=B1=B8=
=B7=DD=A3=AC=D4=D9=B6=D4=B7=C7=D2=BB=D6=C2=D0=D4=B1=B8=B7=DD=CD=EA=B3=C9=BA=
=F3=B5=C4=BF=D8=D6=C6=CE=C4=BC=FE=BD=F8=D0=D0=B1=B8=B7=DD=A1=A3=C8=E7=B9=FB=
=D3=C3=BB=A7=C3=BB=D3=D0=B1=B8=B7=DD=B7=C7=D2=BB=D6=C2=D0=D4=B1=B8=B7=DD=C6=
=DA=BC=E4=B2=FA=C9=FA=B5=C4=B9=E9=B5=B5=D6=D8=D7=F6=C8=D5=D6=BE=A3=AC=BD=AB=
=CE=DE=B7=A8=BB=D6=B8=B4=CA=B9=D3=C3=B7=C7=D2=BB=D6=C2=D0=D4=B1=B8=B7=DD=BB=
=B9=D4=AD=B5=C4=CA=FD=BE=DD=BF=E2=A3=AC=D2=F2=CE=AA=B4=CB=D6=D6=C7=E9=BF=F6=
=CF=C2=BF=C9=C4=DC=C8=B1=C9=D9=D7=E3=B9=BB=B5=C4=D6=D8=D7=F6=C8=D5=D6=BE=C0=
=B4=CA=B9=CA=FD=BE=DD=B1=A3=B3=D6=D2=BB=D6=C2=D0=D4=A1=A3<BR>=A1=A1</TD><=
/TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">032</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">
      <H2><A name=3De.15.1.2></A>Whole Database and Partial Database=20
    Backups</H2></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">
      <H2><A name=3Dc.15.1.2></A>15.1.2 =
=CA=FD=BE=DD=BF=E2=CD=EA=C8=AB=B1=B8=B7=DD=D3=EB=CA=FD=BE=DD=BF=E2=B2=BF=B7=
=D6=B1=B8=B7=DD</H2></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">033</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">This =
section=20
      contains the following topics:
      <UL>
        <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
        =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#e.15.1.2.1"=20
        target=3D_self>Whole Database Backups</A>=20
        <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
        =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#e.15.1.2.2"=20
        target=3D_self>Tablespace Backups</A>=20
        <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
        =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#e.15.1.2.3"=20
        target=3D_self>Datafile Backups</A>=20
        <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
        =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#e.15.1.2.4"=20
        target=3D_self>Control File Backups</A>=20
        <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
        =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#e.15.1.2.5"=20
        target=3D_self>Archived Redo Log Backups</A> </LI></UL></TD>
    <TD vAlign=3Dtop align=3Dleft =
width=3D"48%">=B1=BE=BD=DA=CC=D6=C2=DB=D2=D4=CF=C2=D6=F7=CC=E2=A3=BA
      <UL>
        <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
        =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#c.15.1.2.1"=20
        target=3D_self>=CA=FD=BE=DD=BF=E2=CD=EA=C8=AB=B1=B8=B7=DD</A>=20
        <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
        =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#c.15.1.2.2"=20
        target=3D_self>=B1=ED=BF=D5=BC=E4=B1=B8=B7=DD</A>=20
        <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
        =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#c.15.1.2.3"=20
        target=3D_self>=CA=FD=BE=DD=CE=C4=BC=FE=B1=B8=B7=DD</A>=20
        <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
        =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#c.15.1.2.4"=20
        target=3D_self>=BF=D8=D6=C6=CE=C4=BC=FE=B1=B8=B7=DD</A>=20
        <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
        =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#c.15.1.2.5"=20
        =
target=3D_self>=B9=E9=B5=B5=D6=D8=D7=F6=C8=D5=D6=BE=B1=B8=B7=DD</A> =
</LI></UL></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">034</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">
      <BLOCKQUOTE><B>See Also:</B><BR><BR><A=20
        =
href=3D"http://download-west.oracle.com/docs/cd/B19306_01/server.102/b142=
15/exp_imp.htm#SUTIL001">Oracle=20
        Database Utilities</A> for information about logical=20
    backups</BLOCKQUOTE></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">
      <BLOCKQUOTE><B>=C1=ED=BC=FB=A3=BA</B><BR><BR><A=20
        =
href=3D"http://download-west.oracle.com/docs/cd/B19306_01/server.102/b142=
15/exp_imp.htm#SUTIL001">Oracle=20
        Database Utilities</A> =
=C1=CB=BD=E2=B9=D8=D3=DA=C2=DF=BC=AD=B1=B8=B7=DD=B5=C4=D0=C5=CF=A2</BLOCK=
QUOTE></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">035</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">
      <H3><A name=3De.15.1.2.1></A>Whole Database Backups</H3></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">
      <H3><A name=3Dc.15.1.2.1></A>15.1.2.1 =
=CA=FD=BE=DD=BF=E2=CD=EA=C8=AB=B1=B8=B7=DD</H3></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">036</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">A <A=20
      =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/a">whole=20
      database backup</A> is a backup of every datafile in the database, =
plus=20
      the control file. Whole database backups are the most common type =
of=20
      backup.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%"><A=20
      =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/a">=CA=FD=BE=DD=BF=E2=CD=EA=C8=AB=B1=B8=B7=DD</A>=A3=A8whole=
=20
      database =
backup=A3=A9=CA=C7=CA=FD=BE=DD=BF=E2=C4=DA=CB=F9=D3=D0=CA=FD=BE=DD=CE=C4=BC=
=FE=A3=A8datafile=A3=A9=BC=B0=BF=D8=D6=C6=CE=C4=BC=FE=A3=A8control=20
      =
file=A3=A9=B5=C4=B1=B8=B7=DD=A1=A3=CA=FD=BE=DD=BF=E2=CD=EA=C8=AB=B1=B8=B7=
=DD=CA=C7=D7=EE=B3=A3=D3=C3=B5=C4=D2=BB=D6=D6=B1=B8=B7=DD=A1=A3<BR>=A1=A1=
</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">037</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">Whole =
database=20
      backups can be taken in either <FONT =
color=3D#0000ff>ARCHIVELOG</FONT> or=20
      <FONT color=3D#0000ff>NOARCHIVELOG</FONT> mode. <SPAN=20
      style=3D"BACKGROUND-COLOR: #ffff00">Before performing whole =
database=20
      backups, however, be aware of the implications of backing up in=20
      </SPAN><FONT color=3D#0000ff><SPAN=20
      style=3D"BACKGROUND-COLOR: #ffff00">ARCHIVELOG</SPAN></FONT><SPAN=20
      style=3D"BACKGROUND-COLOR: #ffff00"> and </SPAN><FONT =
color=3D#0000ff><SPAN=20
      style=3D"BACKGROUND-COLOR: =
#ffff00">NOARCHIVELOG</SPAN></FONT><SPAN=20
      style=3D"BACKGROUND-COLOR: #ffff00"> modes.</SPAN><BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">=D4=CB=D0=D0=D4=DA <FONT =

      color=3D#0000ff>ARCHIVELOG</FONT>=A3=A8=B9=E9=B5=B5=A3=A9=BC=B0 =
<FONT=20
      =
color=3D#0000ff>NOARCHIVELOG</FONT>=A3=A8=B7=C7=B9=E9=B5=B5=A3=A9=C4=A3=CA=
=BD=CF=C2=B5=C4=CA=FD=BE=DD=BF=E2=B6=BC=BF=C9=D2=D4=BD=F8=D0=D0=CA=FD=BE=DD=
=BF=E2=CD=EA=C8=AB=B1=B8=B7=DD=A1=A3=D4=DA=20
      =
=BD=F8=D0=D0=CA=FD=BE=DD=BF=E2=CD=EA=C8=AB=B1=B8=B7=DD=C7=B0=A3=AC=D3=A6=C1=
=CB=BD=E2=D4=DA <FONT color=3D#0000ff>ARCHIVELOG</FONT> =BC=B0 <FONT=20
      color=3D#0000ff>NOARCHIVELOG</FONT> =
=C4=A3=CA=BD=CF=C2=B8=F7=D6=D6=B1=B8=B7=DD=B7=BD=B0=B8=BC=E4=B5=C4=B9=D8=CF=
=B5=A1=A3<BR>=A1=A1</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">038</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%"><A=20
      =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#e.f.15.1"=20
      target=3D_self>Figure 15-1</A> illustrates the <SPAN=20
      style=3D"BACKGROUND-COLOR: #ffff00">valid configuration =
options</SPAN> given=20
      the type of backup that is performed.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%"><A=20
      =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#e.f.15.1">=CD=BC</A><A=20
      =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#e.f.15.1"=20
      target=3D_self> 15-1</A> =
=CF=D4=CA=BE=C1=CB=BD=F8=D0=D0=CA=FD=BE=DD=BF=E2=CD=EA=C8=AB=B1=B8=B7=DD=CA=
=B1=CB=F9=D3=D0=BF=C9=C4=DC=B5=C4=B1=B8=B7=DD=B7=BD=B0=B8=A1=A3<BR>=A1=A1=
</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">039</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"48%"><I><B><FONT=20
      size=3D2><A name=3De.f.15.1></A>Figure 15-1 Whole Database Backup=20
      Options<BR>=A1=A1</FONT></B></I></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%"><A =
name=3Dc.f.15.1></A><I><B><FONT=20
      size=3D2>=CD=BC 15-1 =
=CA=FD=BE=DD=BF=E2=CD=EA=C8=AB=B1=B8=B7=DD=B7=BD=B0=B8<BR>=A1=A1</FONT></=
B></I></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">040</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">
      <P align=3Dcenter><A=20
      =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/img=
/e.cncpt195.gif"><IMG=20
      height=3D170=20
      =
src=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/img/=
e.cncpt195.gif"=20
      width=3D470 border=3D0></A><BR>=A1=A1</P></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">
      <P align=3Dcenter><A=20
      =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/img=
/c.cncpt195.gif"><IMG=20
      height=3D170=20
      =
src=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/img/=
c.cncpt195.gif"=20
      width=3D470 border=3D0></A><BR>=A1=A1</P></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">041</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">A =
whole database=20
      backup is either a <A=20
      =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/a">consistent=20
      backup</A> or an <A=20
      =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/a">inconsistent=20
      backup</A>. Whether a backup is consistent determines whether you =
need to=20
      apply redo logs after restoring the backup.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft =
width=3D"48%">=CA=FD=BE=DD=BF=E2=CD=EA=C8=AB=B1=B8=B7=DD=BC=C8=BF=C9=D2=D4=
=CA=C7<A=20
      =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/a">=D2=BB=D6=C2=D0=D4=B1=B8=B7=DD</A>=A3=A8consistent=20
      backup=A3=A9=BB=F2<A=20
      =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/a">=B7=C7=D2=BB=D6=C2=D0=D4=B1=B8=B7=DD</A>=A3=A8inconsisten=
t=20
      =
backup=A3=A9=A1=A3=B1=B8=B7=DD=B5=C4=C0=E0=D0=CD=BE=F6=B6=A8=C1=CB=CA=B9=D3=
=C3=B1=B8=B7=DD=B8=B4=D4=AD=A3=A8restore=A3=A9=CA=FD=BE=DD=BF=E2=BA=F3=CA=
=C7=B7=F1=D0=E8=D2=AA=D3=A6=D3=C3=D6=D8=D7=F6=C8=D5=D6=BE=A3=A8redo =
log=A3=A9=A1=A3<BR>=A1=A1</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">042</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">
      <H3><A name=3De.15.1.2.2></A>Tablespace Backups</H3></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">
      <H3><A name=3Dc.15.1.2.2></A>15.1.2.2 =
=B1=ED=BF=D5=BC=E4=B1=B8=B7=DD</H3></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">043</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">A =
tablespace backup=20
      is a backup of the datafiles that constitute the tablespace. For =
example,=20
      if tablespace <FONT color=3D#0000ff>users</FONT> contains =
datafiles 2, 3,=20
      and 4, then a backup of tablespace <FONT =
color=3D#0000ff>users</FONT> backs=20
      up these three datafiles.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft =
width=3D"48%">=B1=ED=BF=D5=BC=E4=B1=B8=B7=DD=A3=A8tablespace=20
      =
backup=A3=A9=CA=C7=B9=B9=B3=C9=B1=ED=BF=D5=BC=E4=B5=C4=CA=FD=BE=DD=CE=C4=BC=
=FE=A3=A8datafile=A3=A9=B5=C4=B1=B8=B7=DD=A1=A3=C0=FD=C8=E7=A3=AC=C8=E7=B9=
=FB <FONT color=3D#0000ff>users</FONT>=20
      =B1=ED=BF=D5=BC=E4=B0=FC=BA=AC=CA=FD=BE=DD=CE=C4=BC=FE =
2=A3=AC3=A3=AC=BC=B0 4=A3=AC=C4=C7=C3=B4=B6=D4 <FONT =
color=3D#0000ff>users=20
      =
</FONT>=B1=ED=BF=D5=BC=E4=BD=F8=D0=D0=B1=B8=B7=DD=CA=B1=BE=CD=D3=A6=B1=B8=
=B7=DD=D5=E2=C8=FD=B8=F6=CA=FD=BE=DD=CE=C4=BC=FE=A1=A3<BR>=A1=A1</TD></TR=
>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">044</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"48%">Tablespace backups,=20
      whether online or offline, are valid only if the database is =
operating in=20
      <FONT color=3D#0000ff>ARCHIVELOG</FONT> mode. The reason is that =
redo is=20
      required to make the restored tablespace consistent with the other =

      tablespaces in the database.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft=20
      =
width=3D"48%">=B1=ED=BF=D5=BC=E4=B1=B8=B7=DD=BF=C9=D2=D4=CA=C7=C1=AA=BB=FA=
=B5=C4=A3=A8online=A3=A9=BB=F2=CD=D1=BB=FA=B5=C4=A3=A8offline=A3=A9=A3=AC=
=B5=AB=CA=FD=BE=DD=BF=E2=B1=D8=D0=EB=D4=CB=D0=D0=D4=DA <FONT=20
      =
color=3D#0000ff>ARCHIVELOG</FONT>=A3=A8=B9=E9=B5=B5=A3=A9=C4=A3=CA=BD=CF=C2=
=B1=ED=BF=D5=BC=E4=B1=B8=B7=DD=B2=C5=CA=C7=D3=D0=D0=A7=B5=C4=A1=A3=D2=F2=CE=
=AA=D4=DA=CA=B9=D3=C3=B1=ED=BF=D5=BC=E4=B1=B8=B7=DD=B8=B4=D4=AD=A3=A8rest=
ore=A3=A9=D2=BB=B8=F6=B1=ED=BF=D5=BC=E4=BA=F3=A3=AC=B1=D8=D0=EB=D3=A6=D3=C3=
=D6=D8=D7=F6=C8=D5=D6=BE=A3=A8redo=A3=A9=B2=C5=C4=DC=CA=B9=C6=E4=D3=EB=C6=
=E4=CB=FB=B1=ED=BF=D5=BC=E4=B1=A3=B3=D6=D2=BB=D6=C2=D0=D4=A1=A3<BR>=A1=A1=
</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">045</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">
      <H3><A name=3De.15.1.2.3></A>Datafile Backups</H3></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">
      <H3><A name=3Dc.15.1.2.3></A>15.1.2.3 =
=CA=FD=BE=DD=CE=C4=BC=FE=B1=B8=B7=DD</H3></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">046</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">A =
datafile backup is=20
      a backup of a single datafile. Datafile backups, which are not as =
common=20
      as tablespace backups, are valid in <FONT =
color=3D#0000ff>ARCHIVELOG</FONT>=20
      databases. The only time a datafile backup is valid for a database =
in=20
      <FONT color=3D#0000ff>NOARCHIVELOG</FONT> mode is if:
      <UL>
        <LI style=3D"MARGIN-BOTTOM: 10px">Every datafile in a tablespace =
is backed=20
        up. You cannot restore the database unless all datafiles are =
backed up.=20
        <LI style=3D"MARGIN-BOTTOM: 10px">The datafiles are read only or =
<SPAN=20
        style=3D"BACKGROUND-COLOR: #ffff00">offline-normal</SPAN>. =
</LI></UL></TD>
    <TD vAlign=3Dtop align=3Dleft =
width=3D"48%">=CA=FD=BE=DD=CE=C4=BC=FE=B1=B8=B7=DD=A3=A8datafile=20
      =
backup=A3=A9=CA=C7=B6=D4=B5=A5=B8=F6=CA=FD=BE=DD=CE=C4=BC=FE=A3=A8datafil=
e=A3=A9=B5=C4=B1=B8=B7=DD=A1=A3=D3=EB=B1=ED=BF=D5=BC=E4=B1=B8=B7=DD=A3=A8=
tablespace=20
      =
backup=A3=A9=CF=E0=B1=C8=A3=AC=CA=FD=BE=DD=CE=C4=BC=FE=B1=B8=B7=DD=BD=CF=C9=
=D9=B1=BB=CA=B9=D3=C3=A1=A3=CA=FD=BE=DD=BF=E2=D4=CB=D0=D0=D4=DA <FONT=20
      =
color=3D#0000ff>ARCHIVELOG</FONT>=A3=A8=B9=E9=B5=B5=A3=A9=C4=A3=CA=BD=CF=C2=
=CA=B1=CA=FD=BE=DD=CE=C4=BC=FE=B1=B8=B7=DD=B2=C5=D3=D0=D0=A7=A1=A3=B5=AB=D3=
=D0=C1=BD=D6=D6=C0=FD=CD=E2=C7=E9=BF=F6=A3=AC=CA=FD=BE=DD=BF=E2=D4=CB=D0=D0=
=D4=DA <FONT=20
      color=3D#0000ff>NOARCHIVELOG</FONT> =
=A3=A8=B7=C7=B9=E9=B5=B5=A3=A9=C4=A3=CA=BD=CF=C2=CA=FD=BE=DD=CE=C4=BC=FE=B1=
=B8=B7=DD=D2=B2=D3=D0=D0=A7=A3=BA
      <UL>
        <LI style=3D"MARGIN-BOTTOM: =
10px">=B9=B9=B3=C9=B1=ED=BF=D5=BC=E4=B5=C4=CB=F9=D3=D0=CA=FD=BE=DD=CE=C4=BC=
=FE=B6=BC=BD=F8=D0=D0=C1=CB=B1=B8=B7=DD=A1=A3=D3=C3=BB=A7=B1=D8=D0=EB=CA=B9=
=D3=C3=CB=F9=D3=D0=CA=FD=BE=DD=CE=C4=BC=FE=C0=B4=B8=B4=D4=AD=CA=FD=BE=DD=BF=
=E2=A1=A3=20
        <LI style=3D"MARGIN-BOTTOM: =
10px">=CA=FD=BE=DD=CE=C4=BC=FE=CA=C7=D6=BB=B6=C1=B5=C4=BB=F2=CD=D1=BB=FA=A3=
=A8offline-normal=A3=A9=B5=C4=A1=A3=20
  </LI></UL></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">047</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">
      <BLOCKQUOTE><B>See Also:</B><BR><BR><A=20
        =
href=3D"http://download-west.oracle.com/docs/cd/B19306_01/backup.102/b141=
94/rcmsynta009.htm#RCMRF107">Oracle=20
        Database Backup and Recovery Reference</A></BLOCKQUOTE></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">
      <BLOCKQUOTE><B>=C1=ED=BC=FB=A3=BA</B><BR><BR><A=20
        =
href=3D"http://download-west.oracle.com/docs/cd/B19306_01/backup.102/b141=
94/rcmsynta009.htm#RCMRF107">Oracle=20
        Database Backup and Recovery =
Reference</A></BLOCKQUOTE></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">048</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">
      <H3><A name=3De.15.1.2.4></A>Control File Backups</H3></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">
      <H3><A name=3Dc.15.1.2.4></A>15.1.2.4 =
=BF=D8=D6=C6=CE=C4=BC=FE=B1=B8=B7=DD</H3></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">049</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"48%">Backing up the=20
      control file is a crucial aspect of backup and recovery. Without a =
control=20
      file, you cannot mount or open the database.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft =
width=3D"48%">=B1=B8=B7=DD=BF=D8=D6=C6=CE=C4=BC=FE=A3=A8control=20
      =
file=A3=A9=CA=C7=B1=B8=B7=DD=D3=EB=BB=D6=B8=B4=A3=A8recovery=A3=A9=B9=FD=B3=
=CC=D6=D0=B5=C4=D6=D8=D2=AA=B9=A4=D7=F7=A1=A3=C3=BB=D3=D0=BF=D8=D6=C6=CE=C4=
=BC=FE=A3=AC=CA=FD=BE=DD=BF=E2=BD=AB=CE=DE=B7=A8=B9=D2=D4=D8=A3=A8mount=A3=
=A9=BB=F2=B4=F2=BF=AA=A3=A8open=A3=A9=A1=A3<BR>=A1=A1</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">050</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">You =
can instruct=20
      RMAN to automatically backup the control file whenever you run =
backup=20
      jobs. The command is <FONT color=3D#0000ff>CONFIGURE CONTROLFILE=20
      AUTOBACKUP</FONT>. Because the autobackup uses a default filename, =
RMAN=20
      can restore this backup even if the RMAN repository is =
unavailable. Hence,=20
      this feature is extremely useful in a disaster recovery =
scenario.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft =
width=3D"48%">=D3=C3=BB=A7=BF=C9=D2=D4=C0=FB=D3=C3 RMAN =C3=FC=C1=EE =
<FONT=20
      color=3D#0000ff>CONFIGURE CONTROLFILE AUTOBACKUP</FONT>=20
      =
=C0=B4=CA=B5=CF=D6=D4=DA=D4=CB=D0=D0=B1=B8=B7=DD=D7=F7=D2=B5=CA=B1=D7=D4=B6=
=AF=B5=D8=B1=B8=B7=DD=BF=D8=D6=C6=CE=C4=BC=FE=A1=A3=D3=C9=D3=DA=D7=D4=B6=AF=
=B1=B8=B7=DD=B9=A6=C4=DC=A3=A8autobackup=A3=A9=CA=B9=D3=C3=C4=AC=C8=CF=B5=
=C4=CE=C4=BC=FE=C3=FB=A3=AC=BC=B4=CA=B9 RMAN =
=D7=CA=C1=CF=BF=E2=B2=BB=BF=C9=D3=C3 RMAN=20
      =
=D2=B2=C4=DC=CA=B9=D3=C3=B1=B8=B7=DD=B8=B4=D4=AD=A3=A8restore=A3=A9=CA=FD=
=BE=DD=BF=E2=A1=A3=D2=F2=B4=CB=A3=AC=D5=E2=B8=F6=B9=A6=C4=DC=D4=DA=D4=D6=C4=
=D1=BB=D6=B8=B4=A3=A8disaster=20
recovery=A3=A9=B9=A4=D7=F7=D6=D0=BF=C9=D2=D4=B7=A2=BB=D3=D6=D8=D2=AA=D7=F7=
=D3=C3=A1=A3<BR>=A1=A1</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">051</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">You =
can make manual=20
      backups of the control file by using the following methods:
      <UL>
        <LI style=3D"MARGIN-BOTTOM: 10px"><SPAN=20
        style=3D"BACKGROUND-COLOR: #ffff00">The RMAN </SPAN><FONT=20
        color=3D#0000ff><SPAN style=3D"BACKGROUND-COLOR: #ffff00">BACKUP =
CURRENT=20
        CONTROLFILE</SPAN></FONT><SPAN style=3D"BACKGROUND-COLOR: =
#ffff00">=20
        command makes a binary backup of the control file, as either a =
backup=20
        set or an image copy.</SPAN>=20
        <LI style=3D"MARGIN-BOTTOM: 10px">The SQL statement <FONT=20
        color=3D#0000ff>ALTER DATABASE BACKUP CONTROLFILE</FONT> makes a =
binary=20
        backup of the control file.=20
        <LI style=3D"MARGIN-BOTTOM: 10px">The SQL statement <FONT=20
        color=3D#0000ff>ALTER DATABASE BACKUP CONTROLFILE TO =
TRACE</FONT> exports=20
        the control file contents to a SQL script file. You can use the =
script=20
        to create a new control file. <SPAN=20
        style=3D"BACKGROUND-COLOR: #ffff00">Trace file backups have one =
major=20
        disadvantage: they contain no records of archived redo logs, and =
RMAN=20
        backups and copies. For this reason, binary backups are=20
        preferable.</SPAN> </LI></UL></TD>
    <TD vAlign=3Dtop align=3Dleft =
width=3D"48%">=D3=C3=BB=A7=D2=B2=BF=C9=D2=D4=B2=C9=D3=C3=D2=D4=CF=C2=B7=BD=
=CA=BD=CA=D6=B9=A4=B1=B8=B7=DD=BF=D8=D6=C6=CE=C4=BC=FE=A3=BA
      <UL>
        <LI style=3D"MARGIN-BOTTOM: 10px">RMAN =B5=C4 <FONT =
color=3D#0000ff>BACKUP=20
        CURRENT CONTROLFILE</FONT> =
=C3=FC=C1=EE=C4=DC=B9=BB=D2=D4=B6=FE=BD=F8=D6=C6=B5=C4=B8=F1=CA=BD=B1=B8=B7=
=DD=BF=D8=D6=C6=CE=C4=BC=FE=A1=A3=B1=B8=B7=DD=BF=C9=D2=D4=B4=E6=D4=DA=D3=DA=
=B1=B8=B7=DD=BC=AF=A3=A8backup=20
        set=A3=A9=BB=F2=BE=B5=CF=F1=B8=B1=B1=BE=A3=A8image =
copy=A3=A9=D6=D0=A1=A3=20
        <LI style=3D"MARGIN-BOTTOM: 10px">SQL =D3=EF=BE=E4 <FONT =
color=3D#0000ff>ALTER=20
        DATABASE BACKUP CONTROLFILE</FONT> =
=C4=DC=B9=BB=D2=D4=B6=FE=BD=F8=D6=C6=B5=C4=B8=F1=CA=BD=B1=B8=B7=DD=BF=D8=D6=
=C6=CE=C4=BC=FE=A1=A3=20
        <LI style=3D"MARGIN-BOTTOM: 10px">SQL =D3=EF=BE=E4 <FONT =
color=3D#0000ff>ALTER=20
        DATABASE BACKUP CONTROLFILE TO TRACE</FONT> =
=C4=DC=B9=BB=BD=AB=BF=D8=D6=C6=CE=C4=BC=FE=B5=C4=C4=DA=C8=DD=B5=BC=B3=F6=CE=
=AA SQL=20
        =
=BD=C5=B1=BE=CE=C4=BC=FE=A1=A3=D3=C3=BB=A7=BF=C9=D2=D4=CA=B9=D3=C3=B4=CB=BD=
=C5=B1=BE=B4=B4=BD=A8=D0=C2=B5=C4=BF=D8=D6=C6=CE=C4=BC=FE=A1=A3=B5=AB=B8=FA=
=D7=D9=CE=C4=BC=FE=B1=B8=B7=DD=A3=A8trace file=20
        =
backup=A3=A9=D3=D0=D2=BB=B8=F6=D6=D8=B4=F3=C8=B1=B5=E3=A1=A3=B8=FA=D7=D9=CE=
=C4=BC=FE=CE=DE=B7=A8=B1=B8=B7=DD=B9=E9=B5=B5=D6=D8=D7=F6=C8=D5=D6=BE=A3=A8=
archived redo log=A3=A9=BC=B0 RMAN=20
        =
=B1=B8=B7=DD=D3=EB=B1=B8=B7=DD=B8=B1=B1=BE=A1=A3=D2=F2=B4=CB=B2=C9=D3=C3=B6=
=FE=BD=F8=D6=C6=B8=F1=CA=BD=B5=C4=B1=B8=B7=DD=B8=FC=CE=AA=CA=CA=D2=CB=A1=A3=
 </LI></UL></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">052</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">
      <BLOCKQUOTE>
        <P><B>See Also:</B></P>
        <UL>
          <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
          =
href=3D"http://download-west.oracle.com/docs/cd/B19306_01/backup.102/b141=
91/toc.htm">Oracle=20
          Database Backup and Recovery Advanced User's Guide</A>=20
          <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
          =
href=3D"http://download-west.oracle.com/docs/cd/B19306_01/backup.102/b141=
94/toc.htm">Oracle=20
          Database Backup and Recovery Reference</A> =
</LI></UL></BLOCKQUOTE></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">
      <BLOCKQUOTE>
        <P><B>=C1=ED=BC=FB=A3=BA</B></P>
        <UL>
          <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
          =
href=3D"http://download-west.oracle.com/docs/cd/B19306_01/backup.102/b141=
91/toc.htm">Oracle=20
          Database Backup and Recovery Advanced User's Guide</A>=20
          <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
          =
href=3D"http://download-west.oracle.com/docs/cd/B19306_01/backup.102/b141=
94/toc.htm">Oracle=20
          Database Backup and Recovery Reference</A> =
</LI></UL></BLOCKQUOTE></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">053</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">
      <H3><A name=3De.15.1.2.5></A>Archived Redo Log Backups</H3></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">
      <H3><A name=3Dc.15.1.2.5></A>15.1.2.5 =
=B9=E9=B5=B5=D6=D8=D7=F6=C8=D5=D6=BE=B1=B8=B7=DD</H3></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">054</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"48%">Archived redo logs=20
      are essential for recovering an inconsistent backup. The only way =
to=20
      recover an inconsistent backup without archived logs is to use =
RMAN=20
      incremental backups. To be able to recover a backup through the =
most=20
      recent log, every log generated between these two points must be=20
      available. In other words, you cannot recover from log 100 to log =
200 if=20
      log 173 is missing. If log 173 is missing, then you must halt =
recovery at=20
      log 172 and open the database with the <FONT=20
      color=3D#0000ff>RESETLOGS</FONT> option.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft =
width=3D"48%">=D4=DA=BB=D6=B8=B4=A3=A8recover=A3=A9=CA=B9=D3=C3=B7=C7=D2=BB=
=D6=C2=D0=D4=B1=B8=B7=DD=A3=A8inconsistent=20
      =
backup=A3=A9=B8=B4=D4=AD=A3=A8restore=A3=A9=B5=C4=CA=FD=BE=DD=BF=E2=CA=B1=
=A3=AC=B9=E9=B5=B5=D6=D8=D7=F6=C8=D5=D6=BE=A3=A8archived redo =
log=A3=A9=B1=D8=B2=BB=BF=C9=C9=D9=A1=A3=B3=FD=B7=C7=CA=B9=D3=C3=C1=CB =
RMAN=20
      =B5=C4=D4=F6=C1=BF=B1=B8=B7=DD=A3=A8incremental =
backup=A3=A9=B9=A6=C4=DC=A3=AC=B7=F1=D4=F2=B1=D8=D0=EB=C0=FB=D3=C3=B9=E9=B5=
=B5=D6=D8=D7=F6=C8=D5=D6=BE=B6=D4=B7=C7=D2=BB=D6=C2=D0=D4=B1=B8=B7=DD=BD=F8=
=D0=D0=BB=D6=B8=B4=A1=A3=C8=E7=D0=E8=BD=AB=D2=BB=B8=F6=B1=B8=B7=DD=BB=D6=B8=
=B4=B5=BD=D7=EE=D0=C2=C8=D5=D6=BE=B5=E3=A3=A8recent=20
      =
log=A3=A9=A3=AC=D4=F2=B1=D8=D0=EB=CA=B9=D3=C3=B4=D3=B8=B4=D4=AD=B5=E3=B5=BD=
=D7=EE=D0=C2=C8=D5=D6=BE=B5=E3=BC=E4=B5=C4=CB=F9=D3=D0=D6=D8=D7=F6=C8=D5=D6=
=BE=A1=A3=BE=D9=C0=FD=C0=B4=CB=B5=A3=AC=C8=E7=B9=FB 173 =
=BA=C5=D6=D8=D7=F6=C8=D5=D6=BE=B6=AA=CA=A7=A3=AC=D3=C3=BB=A7=BE=CD=CE=DE=B7=
=A8=BD=AB=CA=FD=BE=DD=BF=E2=B4=D3 100 =
=BA=C5=C8=D5=D6=BE=B5=E3=BB=D6=B8=B4=B5=BD=20
      200 =
=BA=C5=C8=D5=D6=BE=B5=E3=A1=A3=B4=CB=CA=B1=D3=C3=BB=A7=D6=BB=C4=DC=D4=DA =
172 =
=BA=C5=C8=D5=D6=BE=B5=E3=B4=A6=CD=A3=D6=B9=BB=D6=B8=B4=A3=AC=B2=A2=CA=B9=D3=
=C3 <FONT color=3D#0000ff>RESETLOGS</FONT>=20
      =
=D1=A1=CF=EE=B4=F2=BF=AA=A3=A8open=A3=A9=CA=FD=BE=DD=BF=E2=A1=A3<BR>=A1=A1=
</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">055</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"48%">Because archived=20
      redo logs are essential to recovery, you should back them up =
regularly. If=20
      possible, then back them up regularly to tape.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft=20
      =
width=3D"48%">=D3=C9=D3=DA=B9=E9=B5=B5=D6=D8=D7=F6=C8=D5=D6=BE=D4=DA=BB=D6=
=B8=B4=D6=D0=B1=D8=B2=BB=BF=C9=C9=D9=A3=AC=D3=C3=BB=A7=D3=A6=B8=C3=D6=DC=C6=
=DA=D0=D4=B5=D8=B6=D4=C6=E4=BD=F8=D0=D0=B1=B8=B7=DD=A1=A3=C8=E7=CC=F5=BC=FE=
=D4=CA=D0=ED=A3=AC=BB=B9=D3=A6=BD=AB=B1=B8=B7=DD=B8=B4=D6=C6=B5=BD=B4=C5=B4=
=F8=C9=CF=A1=A3<BR>=A1=A1</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">056</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">You =
can make backups=20
      of archived logs by using the following methods:
      <UL>
        <LI style=3D"MARGIN-BOTTOM: 10px">The RMAN <FONT =
color=3D#0000ff>BACKUP=20
        ARCHIVELOG</FONT> command=20
        <LI style=3D"MARGIN-BOTTOM: 10px">The RMAN <FONT =
color=3D#0000ff>BACKUP ...=20
        PLUS ARCHIVELOG</FONT> command=20
        <LI style=3D"MARGIN-BOTTOM: 10px">An operating system utility =
</LI></UL></TD>
    <TD vAlign=3Dtop align=3Dleft =
width=3D"48%">=D3=C3=BB=A7=BF=C9=D2=D4=B2=C9=D3=C3=D2=D4=CF=C2=B7=BD=B7=A8=
=B6=D4=B9=E9=B5=B5=D6=D8=D7=F6=C8=D5=D6=BE=BD=F8=D0=D0=B1=B8=B7=DD=A3=BA
      <UL>
        <LI style=3D"MARGIN-BOTTOM: 10px">RMAN <FONT =
color=3D#0000ff>BACKUP=20
        ARCHIVELOG</FONT> =C3=FC=C1=EE=20
        <LI style=3D"MARGIN-BOTTOM: 10px">RMAN <FONT =
color=3D#0000ff>BACKUP ... PLUS=20
        ARCHIVELOG</FONT> =C3=FC=C1=EE=20
        <LI style=3D"MARGIN-BOTTOM: =
10px">=B2=D9=D7=F7=CF=B5=CD=B3=B9=A4=BE=DF </LI></UL></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">057</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">
      <BLOCKQUOTE>
        <P><B>See Also:</B></P>
        <UL>
          <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
          =
href=3D"http://download-west.oracle.com/docs/cd/B19306_01/backup.102/b141=
91/toc.htm">Oracle=20
          Database Backup and Recovery Advanced User's Guide</A>=20
          <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
          =
href=3D"http://download-west.oracle.com/docs/cd/B19306_01/backup.102/b141=
94/toc.htm">Oracle=20
          Database Backup and Recovery Reference</A> =
</LI></UL></BLOCKQUOTE></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">
      <BLOCKQUOTE>
        <P><B>=C1=ED=BC=FB=A3=BA</B></P>
        <UL>
          <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
          =
href=3D"http://download-west.oracle.com/docs/cd/B19306_01/backup.102/b141=
91/toc.htm">Oracle=20
          Database Backup and Recovery Advanced User's Guide</A>=20
          <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
          =
href=3D"http://download-west.oracle.com/docs/cd/B19306_01/backup.102/b141=
94/toc.htm">Oracle=20
          Database Backup and Recovery Reference</A> =
</LI></UL></BLOCKQUOTE></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">058</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">
      <H2><A name=3De.15.1.3></A>RMAN and User-Managed Backups</H2></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">
      <H2><A name=3Dc.15.1.3></A>15.1.3 RMAN =
=B1=B8=B7=DD=D3=EB=CA=D6=B9=A4=B9=DC=C0=ED=B1=B8=B7=DD</H2></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">059</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">There =
are two types=20
      of backups: image copies and <SPAN=20
      style=3D"BACKGROUND-COLOR: #ffff00">backup set</SPAN>s. An image =
copy is an=20
      exact duplicate of a datafile, control file, or archived log. You =
can=20
      create image copies of physical files with operating system =
utilities or=20
      RMAN, and you can restore them as-is without performing additional =

      processing by using either operating system utilities or =
RMAN.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft =
width=3D"48%">=B1=B8=B7=DD=D3=D0=C1=BD=D6=D6=C0=E0=D0=CD=A3=A8type=A3=A9=A3=
=BA=BE=B5=CF=F1=B8=B1=B1=BE=A3=A8image=20
      copy=A3=A9=BC=B0=B1=B8=B7=DD=BC=AF=A3=A8backup =
set=A3=A9=A1=A3=BE=B5=CF=F1=B8=B1=B1=BE=CA=C7=D3=EB=CA=FD=BE=DD=CE=C4=BC=FE=
=A3=A8datafile=A3=A9=A3=AC=BF=D8=D6=C6=CE=C4=BC=FE=A3=A8control=20
      =
file=A3=A9=BB=F2=B9=E9=B5=B5=D6=D8=D7=F6=C8=D5=D6=BE=CE=C4=BC=FE=A3=A8arc=
hived =
log=A3=A9=CD=EA=C8=AB=D2=BB=D6=C2=B5=C4=B8=B1=B1=BE=A1=A3=D3=C3=BB=A7=BF=C9=
=D2=D4=CA=B9=D3=C3=B2=D9=D7=F7=CF=B5=CD=B3=B9=A4=BE=DF=BB=F2 RMAN =
=B4=B4=BD=A8=BE=B5=CF=F1=B8=B1=B1=BE=A3=AC=D2=B2=C4=DC=B9=BB=CA=B9=D3=C3=B2=
=D9=D7=F7=CF=B5=CD=B3=B9=A4=BE=DF=BB=F2=20
      RMAN =
=D6=B1=BD=D3=C0=FB=D3=C3=BE=B5=CF=F1=B8=B1=B1=BE=BB=D6=B8=B4=CA=FD=BE=DD=BF=
=E2=A3=AC=B6=F8=CE=DE=D0=EB=C8=CE=BA=CE=B6=EE=CD=E2=B4=A6=C0=ED=A1=A3<BR>=
=A1=A1</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">060</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">
      <BLOCKQUOTE><B>Note:</B><BR><BR>Unlike operating system copies, =
RMAN=20
        validates the blocks in the file and records the copy in the=20
      repository.</BLOCKQUOTE></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">
      <BLOCKQUOTE><B>=CC=E1=CA=BE=A3=BA</B><BR><BR>RMAN =D3=EB =
=B2=D9=D7=F7=CF=B5=CD=B3=B8=B4=D6=C6=B5=C4=C7=F8=B1=F0=D4=DA=D3=DA=A3=ACR=
MAN=20
        =
=C4=DC=B9=BB=D1=E9=D6=A4=B1=B8=B7=DD=CE=C4=BC=FE=C4=DA=CA=FD=BE=DD=BF=E9=B5=
=C4=D3=D0=D0=A7=D0=D4=A3=AC=B2=A2=D4=DA=D7=CA=C1=CF=BF=E2=D6=D0=BC=C7=C2=BC=
=B8=B4=D6=C6=B5=C4=C7=E9=BF=F6=A1=A3</BLOCKQUOTE></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">061</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">A =
backup set is a=20
      backup in a proprietary format that consists of one or more =
physical files=20
      called <SPAN style=3D"BACKGROUND-COLOR: #ffff00">backup =
piece</SPAN>s. It=20
      differs from an image copy in that it can contain more than one =
database=20
      file, and it can also be backed up using special processing, such =
as=20
      compression or incremental backup. You must use RMAN to restore a =
backup=20
      set.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft =
width=3D"48%">=B1=B8=B7=DD=BC=AF=A3=A8backup =
set=A3=A9=CA=C7=D3=C9=B1=BB=B3=C6=CE=AA=B1=B8=B7=DD=B3=C9=D4=B1=A3=A8back=
up=20
      =
piece=A3=A9=B5=C4=D2=BB=B8=F6=BB=F2=B6=E0=B8=F6=CE=EF=C0=ED=CE=C4=BC=FE=B9=
=B9=B3=C9=B5=C4=A3=AC=C6=E4=B8=F1=CA=BD=CE=AA RMAN=20
      =
=D7=D4=D3=D0=B8=F1=CA=BD=A1=A3=B1=B8=B7=DD=BC=AF=D3=EB=BE=B5=CF=F1=B8=B1=B1=
=BE=B5=C4=C7=F8=B1=F0=D4=DA=D3=DA=A3=AC=B1=B8=B7=DD=BC=AF=C4=DA=BF=C9=D2=D4=
=B0=FC=BA=AC=B6=E0=B8=F6=CA=FD=BE=DD=CE=C4=BC=FE=A3=AC=C7=D2=B1=B8=B7=DD=B9=
=FD=B3=CC=D6=D0=BF=C9=D2=D4=BD=F8=D0=D0=CC=D8=CA=E2=B4=A6=C0=ED=A3=AC=C0=FD=
=C8=E7=D1=B9=CB=F5=BB=F2=D4=F6=C1=BF=B1=B8=B7=DD=A3=A8incremental=20
      backup=A3=A9=B5=C8=A1=A3=B1=B8=B7=DD=BC=AF=B1=D8=D0=EB=CA=B9=D3=C3 =
RMAN =C0=B4=BB=D6=B8=B4=A1=A3<BR>=A1=A1</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">062</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">
      <H3><A name=3De.15.1.3.1></A>RMAN with Online Backups</H3></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">
      <H3><A name=3Dc.15.1.3.1></A>15.1.3.1 =CA=B9=D3=C3 RMAN =
=BD=F8=D0=D0=C1=AA=BB=FA=B1=B8=B7=DD</H3></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">063</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"48%">Because the database=20
      continues writing to the file during an online backup, there is =
the=20
      possibility of backing up inconsistent data within a block. For =
example,=20
      assume that either RMAN or an operating system utility reads the =
block=20
      while database writer is in the middle of updating the block. In =
this=20
      case, RMAN or the copy utility could read the old data in the top =
half of=20
      the block and the new data in the bottom top half of the block. =
The block=20
      is a <SPAN style=3D"BACKGROUND-COLOR: #ffff00">fractured =
block</SPAN>,=20
      meaning that the data in this block is not =
consistent.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft =
width=3D"48%">=D4=DA=C1=AA=BB=FA=B1=B8=B7=DD=A3=A8online=20
      =
backup=A3=A9=C6=DA=BC=E4=CA=FD=BE=DD=BF=E2=C8=D4=BB=E1=CF=F2=CA=FD=BE=DD=CE=
=C4=BC=FE=D6=D0=D0=B4=C8=EB=CA=FD=BE=DD=A3=AC=D2=F2=B4=CB=B1=B8=B7=DD=D6=D0=
=BF=C9=C4=DC=B4=E6=D4=DA=BA=AC=D3=D0=B7=C7=D2=BB=D6=C2=D0=D4=A3=A8inconsi=
stent=A3=A9=CA=FD=BE=DD=B5=C4=CA=FD=BE=DD=BF=E9=A3=A8data=20
      block=A3=A9=A1=A3=C0=FD=C8=E7=A3=ACRMAN =
=BB=F2=B2=D9=D7=F7=CF=B5=CD=B3=B9=A4=BE=DF=D4=DA=B6=C1=C8=A1=CA=FD=BE=DD=BF=
=E9=B5=C4=CD=AC=CA=B1=A3=AC=CA=FD=BE=DD=BF=E2=D0=B4=BD=F8=B3=CC=BF=C9=C4=DC=
=BB=E1=B8=FC=D0=C2=CF=E0=CD=AC=B5=C4=CA=FD=BE=DD=BF=E9=A1=A3=B4=CB=CA=B1=A3=
=ACRMAN=20
      =
=BB=F2=B8=B4=D6=C6=B9=A4=BE=DF=B6=C1=C8=A1=B5=C4=CA=FD=BE=DD=BF=E9=D6=D0=BC=
=C8=B0=FC=BA=AC=D0=C2=CA=FD=BE=DD=A3=AC=D3=D6=B0=FC=BA=AC=BE=C9=CA=FD=BE=DD=
=A1=A3=D5=E2=D1=F9=B5=C4=CA=FD=BE=DD=BF=E9=CA=C7=CE=DE=D0=A7=BF=E9=A3=A8f=
ractured=20
  =
block=A3=A9=A3=AC=BC=B4=BF=E9=C4=DA=B5=C4=CA=FD=BE=DD=B2=BB=BE=DF=B1=B8=D2=
=BB=D6=C2=D0=D4=A1=A3<BR>=A1=A1</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">064</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">During =
an RMAN=20
      backup, the Oracle database server reads the datafiles, not an =
operating=20
      system utility. The server reads each block and determines whether =
the=20
      block is fractured. If the block is fractured, then Oracle =
re-reads the=20
      block until it gets a consistent picture of the =
data.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">=D4=DA=CA=B9=D3=C3 RMAN =
=BD=F8=D0=D0=B1=B8=B7=DD=CA=B1=A3=AC=CA=C7 Oracle=20
      =
=CA=FD=BE=DD=BF=E2=B7=FE=CE=F1=C6=F7=B6=F8=B7=C7=B2=D9=D7=F7=CF=B5=CD=B3=B9=
=A4=BE=DF=B8=BA=D4=F0=B6=C1=C8=A1=CA=FD=BE=DD=CE=C4=BC=FE=A3=A8datafile=A3=
=A9=A1=A3=CA=FD=BE=DD=BF=E2=B7=FE=CE=F1=C6=F7=D6=F0=D2=BB=B6=C1=C8=A1=CA=FD=
=BE=DD=BF=E9=B2=A2=C5=D0=B6=CF=C6=E4=CA=C7=B7=F1=D3=D0=D0=A7=A1=A3=C8=E7=B9=
=FB=CA=FD=BE=DD=BF=E9=CA=C7=CE=DE=D0=A7=B5=C4=A3=ACOracle=20
      =
=BB=E1=D4=D9=B4=CE=B6=C1=C8=A1=D6=B1=B5=C0=BB=F1=B5=C3=C1=CB=BE=DF=B1=B8=D2=
=BB=D6=C2=D0=D4=B5=C4=CA=FD=BE=DD=BF=E9=CE=AA=D6=B9=A1=A3<BR>=A1=A1</TD><=
/TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">065</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">When =
you back up an=20
      online datafile with an operating system utility (rather than with =
RMAN),=20
      you must use a different method to handle fractured blocks. You =
must first=20
      place the files in backup mode with the <FONT =
color=3D#0000ff>ALTER=20
      TABLESPACE BEGIN BACKUP</FONT> statement (to back up an individual =

      tablespace), or the <FONT color=3D#0000ff>ALTER DATABASE BEGIN =
BACKUP</FONT>=20
      statement (to back up the entire database). After an online backup =
is=20
      completed, you must run the <FONT color=3D#0000ff>ALTER TABLESPACE =
... END=20
      BACKUP</FONT> or <FONT color=3D#0000ff>ALTER DATABASE END =
BACKUP</FONT>=20
      statement to take the tablespace out of backup =
mode.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft =
width=3D"48%">=C8=E7=B9=FB=D3=C3=BB=A7=CA=B9=D3=C3=B2=D9=D7=F7=CF=B5=CD=B3=
=B9=A4=BE=DF=A3=A8=B6=F8=B7=C7=20
      =
RMAN=A3=A9=B1=B8=B7=DD=C1=AA=BB=FA=CA=FD=BE=DD=A3=AC=D4=F2=D0=E8=B2=C9=D3=
=C3=C1=ED=D2=BB=D6=D6=B7=BD=CA=BD=BD=E2=BE=F6=CE=DE=D0=A7=BF=E9=B5=C4=CE=CA=
=CC=E2=A1=A3=D3=C3=BB=A7=D0=E8=D2=AA=CA=D7=CF=C8=CA=B9=D3=C3 <FONT =
color=3D#0000ff>ALTER=20
      TABLESPACE BEGIN BACKUP</FONT> =
=D3=EF=BE=E4=A3=A8=B1=B8=B7=DD=B5=A5=B6=C0=B5=C4=B1=ED=BF=D5=BC=E4=A3=A9=BB=
=F2 <FONT color=3D#0000ff>ALTER=20
      DATABASE BEGIN BACKUP</FONT> =
=D3=EF=BE=E4=A3=A8=B1=B8=B7=DD=D5=FB=B8=F6=CA=FD=BE=DD=BF=E2=A3=A9=BD=AB=CA=
=FD=BE=DD=CE=C4=BC=FE=D6=C3=CE=AA=B1=B8=B7=DD=C4=A3=CA=BD=A3=A8backup=20
      =
mode=A3=A9=A1=A3=D4=DA=C1=AA=BB=FA=B1=B8=B7=DD=BD=E1=CA=F8=BA=F3=A3=AC=D4=
=D9=CA=B9=D3=C3 <FONT color=3D#0000ff>ALTER TABLESPACE ... END=20
      BACKUP</FONT> =BB=F2 <FONT color=3D#0000ff>ALTER DATABASE END =
BACKUP</FONT>=20
      =
=BD=AB=CF=E0=B9=D8=B5=C4=CA=FD=BE=DD=CE=C4=BC=FE=BB=D6=B8=B4=D4=AD=D7=B4=CC=
=AC=A1=A3<BR>=A1=A1</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">066</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">When =
updates are=20
      made to files in backup mode, additional redo data is logged. This =

      additional data is needed to repair fractured blocks that might be =
backed=20
      up by the operating system utility.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft=20
      =
width=3D"48%">=B5=B1=CA=FD=BE=DD=BF=E2=B6=D4=B4=A6=D3=DA=B1=B8=B7=DD=C4=A3=
=CA=BD=B5=C4=CE=C4=BC=FE=BD=F8=D0=D0=D0=DE=B8=C4=B2=D9=D7=F7=CA=B1=A3=AC=CF=
=B5=CD=B3=BB=E1=BC=C7=C2=BC=B6=EE=CD=E2=B5=C4=D6=D8=D7=F6=CA=FD=BE=DD=A3=A8=
redo=20
      =
data=A3=A9=A1=A3=D5=E2=D0=A9=CA=FD=BE=DD=D3=C3=D3=DA=D0=DE=B8=B4=B2=D9=D7=
=F7=CF=B5=CD=B3=B9=A4=BE=DF=B1=B8=B7=DD=D6=D0=BF=C9=C4=DC=B0=FC=BA=AC=B5=C4=
=CE=DE=D0=A7=BF=E9=A1=A3<BR>=A1=A1</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">067</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">
      <H1><A name=3De.15.2></A><SPAN style=3D"FONT-SIZE: =
20pt">Introduction to=20
      Recovery</SPAN></H1></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">
      <H1><A name=3Dc.15.2></A><SPAN style=3D"FONT-SIZE: 20pt">15.2=20
    =BB=D6=B8=B4=BC=F2=BD=E9</SPAN></H1></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">068</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">To =
restore a=20
      physical backup of a datafile or control file is to reconstruct it =
and=20
      make it available to the Oracle database server. To recover a =
restored=20
      datafile is to update it by applying archived redo logs and online =
redo=20
      logs, that is, records of changes made to the database after the =
backup=20
      was taken. If you use RMAN, then you can also recover datafiles =
with=20
      incremental backups, which are backups of a datafile that contain =
only=20
      blocks that changed after a previous incremental =
backup.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft=20
      =
width=3D"48%">=B8=B4=D4=AD=A3=A8restore=A3=A9=CA=FD=BE=DD=CE=C4=BC=FE=A3=A8=
datafile=A3=A9=BB=F2=BF=D8=D6=C6=CE=C4=BC=FE=A3=A8control=20
      =
file=A3=A9=B5=C4=CE=EF=C0=ED=B1=B8=B7=DD=CA=C7=D6=B8=C0=FB=D3=C3=B1=B8=B7=
=DD=D6=D8=BD=A8=D5=E2=D0=A9=CE=C4=BC=FE=B2=A2=CA=B9=C6=E4=D4=DA Oracle=20
      =
=CA=FD=BE=DD=BF=E2=B7=FE=CE=F1=C6=F7=D6=D0=D5=FD=B3=A3=B9=A4=D7=F7=A1=A3=B6=
=F8=B6=D4=B8=B4=D4=AD=B5=C4=CA=FD=BE=DD=CE=C4=BC=FE=BD=F8=D0=D0=BB=D6=B8=B4=
=A3=A8recover=A3=A9=CA=C7=D6=B8=C0=FB=D3=C3=B9=E9=B5=B5=D6=D8=D7=F6=C8=D5=
=D6=BE=A3=A8archived redo=20
      log=A3=A9=BC=B0=C1=AA=BB=FA=D6=D8=D7=F6=C8=D5=D6=BE=A3=A8online =
redo =
log=A3=A9=B6=D4=C6=E4=BD=F8=D0=D0=B8=FC=D0=C2=A3=AC=BC=B4=D6=D8=D7=F6=D4=DA=
=CA=FD=BE=DD=BF=E2=B1=B8=B7=DD=BA=F3=B7=A2=C9=FA=B5=C4=B2=D9=D7=F7=A1=A3=C8=
=E7=B9=FB=CA=B9=D3=C3=C1=CB=20
      =
RMAN=A3=AC=D3=C3=BB=A7=D2=B2=BF=C9=D2=D4=CA=B9=D3=C3=D4=F6=C1=BF=B1=B8=B7=
=DD=A3=A8incremental=20
      =
backup=A3=A9=C0=B4=BB=D6=B8=B4=CA=FD=BE=DD=CE=C4=BC=FE=A3=AC=CA=FD=BE=DD=CE=
=C4=BC=FE=B5=C4=D4=F6=C1=BF=B1=B8=B7=DD=D6=D0=D6=BB=B0=FC=BA=AC=C6=E4=C7=B0=
=D2=BB=B4=CE=D4=F6=C1=BF=B1=B8=B7=DD=BA=F3=D0=DE=B8=C4=B9=FD=B5=C4=CA=FD=BE=
=DD=BF=E9=A1=A3<BR>=A1=A1</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">069</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%"><SPAN=20
      style=3D"BACKGROUND-COLOR: #ffff00">After the necessary files are =
restored,=20
      media recovery must be initiated by the user. Media recovery =
involves=20
      various operations to restore, roll forward, and roll back a =
backup of=20
      database files.</SPAN><BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft =
width=3D"48%">=B5=B1=CB=F9=D3=D0=CE=C4=BC=FE=B1=BB=B8=B4=D4=AD=BA=F3=A3=AC=
=D3=C3=BB=A7=BB=B9=D0=E8=D6=B4=D0=D0=BD=E9=D6=CA=BB=D6=B8=B4=A3=A8media=20
      =
recovery=A3=A9=B5=C4=CA=A3=D3=E0=B2=BD=D6=E8=A1=A3=BD=E9=D6=CA=BB=D6=B8=B4=
=B9=FD=B3=CC=B0=FC=C0=A8=C1=CB=B6=D4=B1=B8=B7=DD=CA=FD=BE=DD=BF=E2=CE=C4=BC=
=FE=B5=C4=B8=B4=D4=AD=A3=AC=C7=B0=B9=F6=A3=A8roll =
forward=A3=A9=BC=B0=BB=D8=B9=F6=A3=A8roll=20
    back=A3=A9=B5=C8=B2=D9=D7=F7=A1=A3<BR>=A1=A1</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">070</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">Media =
recovery=20
      applies archived redo logs and online redo logs to recover the =
datafiles.=20
      Whenever a change is made to a datafile, the change is first =
recorded in=20
      the online redo logs. Media recovery selectively applies the =
changes=20
      recorded in the online and archived redo logs to the restored =
datafile to=20
      roll it forward.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft=20
      =
width=3D"48%">=D4=DA=BD=E9=D6=CA=BB=D6=B8=B4=B9=FD=B3=CC=D6=D0=BD=AB=D3=A6=
=D3=C3=B9=E9=B5=B5=D6=D8=D7=F6=C8=D5=D6=BE=BC=B0=C1=AA=BB=FA=D6=D8=D7=F6=C8=
=D5=D6=BE=BB=D6=B8=B4=CA=FD=BE=DD=CE=C4=BC=FE=A1=A3Oracle=20
      =
=C3=BF=B4=CE=D0=DE=B8=C4=CA=FD=BE=DD=CE=C4=BC=FE=D6=AE=C7=B0=A3=AC=B6=BC=BB=
=E1=CA=D7=CF=C8=BD=AB=D5=E2=D0=A9=D0=DE=B8=C4=BC=C7=C2=BC=D4=DA=C1=AA=BB=FA=
=D6=D8=D7=F6=C8=D5=D6=BE=D6=D0=A1=A3=BD=E9=D6=CA=BB=D6=B8=B4=B9=FD=B3=CC =

      =
=BE=CD=CA=C7=BD=AB=B9=E9=B5=B5=D6=D8=D7=F6=C8=D5=D6=BE=BC=B0=C1=AA=BB=FA=D6=
=D8=D7=F6=C8=D5=D6=BE=D6=D0=B5=C4=CF=E0=B9=D8=D0=DE=B8=C4=B2=D9=D7=F7=BC=C7=
=C2=BC=D3=A6=D3=C3=B5=BD=B8=B4=D4=AD=B5=C4=CA=FD=BE=DD=CE=C4=BC=FE=D6=D0=D2=
=D4=CA=B5=CF=D6=C7=B0=B9=F6=A1=A3<BR>=A1=A1</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">071</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">To =
correct problems=20
      caused by logical data corruptions or user errors, you can use =
<SPAN=20
      style=3D"BACKGROUND-COLOR: #ffff00">Oracle Flashback</SPAN>. =
Oracle=20
      Flashback Database and Oracle Flashback Table let you quickly =
recover to a=20
      previous time.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft =
width=3D"48%">=C8=E7=B9=FB=D3=C3=BB=A7=D0=E8=D2=AA=D0=DE=D5=FD=C2=DF=BC=AD=
=CA=FD=BE=DD=B4=ED=CE=F3=A3=A8logical data=20
      =
corruption=A3=A9=BB=F2=D3=C3=BB=A7=B2=D9=D7=F7=CA=A7=CE=F3=A3=A8user =
error=A3=A9=A3=AC=BF=C9=D2=D4=CA=B9=D3=C3 Oracle =
Flashback=A3=A8=BB=D8=C9=C1=A3=A9=BC=BC=CA=F5=A1=A3=D3=C3=BB=A7=C0=FB=D3=C3=
 Oracle=20
      Flashback Database=A3=A8=BB=D8=C9=C1=CA=FD=BE=DD=BF=E2=A3=A9=BC=B0 =
Oracle Flashback=20
      =
Table=A3=A8=BB=D8=C9=C1=B1=ED=A3=A9=C4=DC=B9=BB=BD=AB=CA=FD=BE=DD=D1=B8=CB=
=D9=BB=D6=B8=B4=B5=BD=D6=AE=C7=B0=C4=B3=B8=F6=CA=B1=BC=E4=B5=E3=B5=C4=D7=B4=
=CC=AC=A1=A3<BR>=A1=A1</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">072</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%"><A=20
      =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#e.f.15.2"=20
      target=3D_self>Figure 15-2</A> illustrates the basic principle of =
backing=20
      up, restoring, and performing media recovery on a =
database.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%"><A=20
      =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#e.f.15.2">=CD=BC</A><A=20
      =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#e.f.15.2"=20
      target=3D_self> 15-2</A> =
=CF=D4=CA=BE=C1=CB=CA=FD=BE=DD=BF=E2=B1=B8=B7=DD=A3=AC=B8=B4=D4=AD=A3=AC=BC=
=B0=BD=E9=D6=CA=BB=D6=B8=B4=B5=C4=BB=F9=B1=BE=D4=AD=C0=ED=A1=A3<BR>=A1=A1=
</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">073</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"48%"><I><B><FONT=20
      size=3D2><A name=3De.f.15.2></A>Figure 15-2 Media=20
    Recovery<BR>=A1=A1</FONT></B></I></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%"><A =
name=3Dc.f.15.2></A><I><B><FONT=20
      size=3D2>=CD=BC 15-2 =
=BD=E9=D6=CA=BB=D6=B8=B4<BR>=A1=A1</FONT></B></I></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">074</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">
      <P align=3Dcenter><A=20
      =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/img=
/e.cncpt207.gif"><IMG=20
      height=3D318=20
      =
src=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/img/=
e.cncpt207.gif"=20
      width=3D470 border=3D0></A><BR>=A1=A1</P></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">
      <P align=3Dcenter><A=20
      =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/img=
/c.cncpt207.gif"><IMG=20
      height=3D318=20
      =
src=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/img/=
c.cncpt207.gif"=20
      width=3D470 border=3D0></A><BR>=A1=A1</P></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">075</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">
      <BLOCKQUOTE><FONT size=3D2>Figure 15-2 illustrates the concept of=20
        restoring and recovering a database from a backup, following a =
media=20
        failure. A backup of the database is taken at SCN 100. Media =
failure=20
        occurs at SCN 600. Redo logs spanning the period from SCN 100 to =
SCN 600=20
        have been archived for use in recovery. The backup from SCN 100 =
is=20
        restored, or copied onto new media. The redo logs are used to =
recover=20
        the database, performing again each database change that =
occurred=20
        between the backup and the point of media =
failure.</FONT></BLOCKQUOTE></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">
      <BLOCKQUOTE><FONT size=3D2>=CD=BC 15-2 =
=CF=D4=CA=BE=C1=CB=CA=FD=BE=DD=BF=E2=BD=E9=D6=CA=B9=CA=D5=CF=BA=F3=BD=F8=D0=
=D0=B8=B4=D4=AD=BC=B0=BB=D6=B8=B4=B5=C4=BB=F9=B1=BE=B8=C5=C4=EE=A1=A3=CA=FD=
=BE=DD=BF=E2=D4=DA SCN =CE=AA 100=20
        =CA=B1=BD=F8=D0=D0=C1=CB=B1=B8=B7=DD=A3=AC=D4=DA SCN =CE=AA 600 =
=CA=B1=B7=A2=C9=FA=C1=CB=BD=E9=D6=CA=B9=CA=D5=CF=A1=A3SCN =D4=DA 100 =
=D6=C1 600 =
=D6=AE=BC=E4=B5=C4=D6=D8=D7=F6=C8=D5=D6=BE=D2=D1=BE=AD=B1=BB=B9=E9=B5=B5=D2=
=D4=B9=A9=BB=D6=B8=B4=D6=BB=D3=C3=A1=A3=D3=C3=BB=A7=CA=D7=CF=C8=CA=B9=D3=C3=
=20
        SCN =CE=AA 100=20
        =
=CA=B1=D6=C6=D7=F7=B5=C4=B1=B8=B7=DD=B8=B4=D4=AD=CA=FD=BE=DD=BF=E2=A3=A8=B8=
=B4=D4=AD=D2=B2=BF=C9=D2=D4=D4=DA=D0=C2=BD=E9=D6=CA=C9=CF=BD=F8=D0=D0=A3=A9=
=A1=A3=D6=AE=BA=F3=D4=D9=CA=B9=D3=C3=D6=D8=D7=F6=C8=D5=D6=BE=BB=D6=B8=B4=CA=
=FD=BE=DD=BF=E2=A3=AC=BC=B4=D6=D8=D0=C2=D6=B4=D0=D0=B4=D3=B1=B8=B7=DD=B5=E3=
=B5=BD=BD=E9=D6=CA=B9=CA=D5=CF=B5=E3=D6=AE=BC=E4=B5=C4=CB=F9=D3=D0=CA=FD=BE=
=DD=D0=DE=B8=C4=B2=D9=D7=F7=A1=A3</FONT></BLOCKQUOTE></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">076</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">Unlike =
media=20
      recovery, Oracle performs <SPAN style=3D"BACKGROUND-COLOR: =
#ffff00">crash=20
      recovery</SPAN> and instance recovery automatically after an =
instance=20
      failure. Crash and instance recovery recover a database to its=20
      transaction-consistent state just before instance failure. By =
definition,=20
      crash recovery is the recovery of a database in a single-instance=20
      configuration or an Oracle Real Application Clusters configuration =
in=20
      which all instances have crashed. In contrast, instance recovery =
is the=20
      recovery of one failed instance by a live instance in an Oracle =
Real=20
      Application Clusters configuration.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft =
width=3D"48%">=D3=EB=BD=E9=D6=CA=BB=D6=B8=B4=B2=BB=CD=AC=A3=ACOracle =
=D4=DA=CA=B5=C0=FD=B9=CA=D5=CF=A3=A8instance=20
      =
failure=A3=A9=D6=AE=BA=F3=C4=DC=D7=D4=B6=AF=B5=D8=D6=B4=D0=D0=B1=C0=C0=A3=
=BB=D6=B8=B4=A3=A8crash =
recovery=A3=A9=BC=B0=CA=B5=C0=FD=BB=D6=B8=B4=A3=A8instance=20
      =
recovery=A3=A9=A1=A3=B1=C0=C0=A3=BB=D6=B8=B4=BC=B0=CA=B5=C0=FD=BB=D6=B8=B4=
=C4=DC=B9=BB=D4=DA=CA=B5=C0=FD=B9=CA=D5=CF=B7=A2=C9=FA=BA=F3=BD=AB=CA=FD=BE=
=DD=BF=E2=BB=D6=B8=B4=B5=BD=C2=FA=D7=E3=CA=C2=CE=F1=D2=BB=D6=C2=D0=D4=A3=A8=
transaction-consistent=A3=A9=B5=C4=D7=B4=CC=AC=A1=A3=B1=C0=C0=A3=BB=D6=B8=
=B4=B5=C4=B6=A8=D2=E5=CA=C7=A3=BA=B5=A5=CA=B5=C0=FD=CF=B5=CD=B3=B7=A2=C9=FA=
=B1=C0=C0=A3=BB=F2=20
      Oracle RAC =
=CF=B5=CD=B3=D6=D0=CB=F9=D3=D0=CA=B5=C0=FD=B7=A2=C9=FA=B1=C0=C0=A3=BA=F3=B6=
=D4=CA=FD=BE=DD=BF=E2=BD=F8=D0=D0=B5=C4=BB=D6=B8=B4=A1=A3=D3=EB=D6=AE=CF=E0=
=B6=D4=A3=AC=CA=B5=C0=FD=BB=D6=B8=B4=B5=C4=B6=A8=D2=E5=CA=C7=A3=BAOracle =
RAC=20
      =
=CF=B5=CD=B3=D6=D0=D5=FD=B3=A3=CA=B5=C0=FD=B6=D4=B9=CA=D5=CF=CA=B5=C0=FD=BD=
=F8=D0=D0=B5=C4=BB=D6=B8=B4=A1=A3<BR>=A1=A1</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">077</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">This =
section=20
      contains the following topics:
      <UL>
        <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
        =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#e.15.2.1"=20
        target=3D_self>Overview of Media Recovery</A>=20
        <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
        =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#e.15.2.2"=20
        target=3D_self>Overview of RMAN and User-Managed Restore and =
Recovery</A>=20
        <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
        =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#e.15.2.3"=20
        target=3D_self>Recovery Using Oracle Flashback Technology</A>=20
        <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
        =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#e.15.2.4"=20
        target=3D_self>Other Types of Oracle Recovery</A> =
</LI></UL></TD>
    <TD vAlign=3Dtop align=3Dleft =
width=3D"48%">=B1=BE=BD=DA=B0=FC=BA=AC=D2=D4=CF=C2=D6=F7=CC=E2=A3=BA
      <UL>
        <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
        =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#c.15.2.1"=20
        target=3D_self>=BD=E9=D6=CA=BB=D6=B8=B4=B8=C5=CA=F6</A>=20
        <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
        =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#c.15.2.2"=20
        target=3D_self>RMAN =
=D3=EB=CA=D6=B9=A4=B9=DC=C0=ED=B5=C4=B8=B4=D4=AD=BC=B0=BB=D6=B8=B4=B8=C5=CA=
=F6</A>=20
        <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
        =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#c.15.2.3"=20
        target=3D_self>=C0=FB=D3=C3 Oracle Flashback =
=BC=BC=CA=F5=CA=B5=CF=D6=BB=D6=B8=B4</A>=20
        <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
        =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#c.15.2.4"=20
        target=3D_self>=C6=E4=CB=FB=C0=E0=D0=CD=B5=C4 Oracle =
=BB=D6=B8=B4</A> </LI></UL></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">078</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">
      <BLOCKQUOTE>
        <P><B>See Also:</B></P>
        <UL>
          <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
          =
href=3D"http://download-west.oracle.com/docs/cd/B19306_01/backup.102/b141=
91/toc.htm">Oracle=20
          Database Backup and Recovery Advanced User's Guide</A>=20
          <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
          =
href=3D"http://download-west.oracle.com/docs/cd/B19306_01/backup.102/b141=
94/toc.htm">Oracle=20
          Database Backup and Recovery Reference</A> =
</LI></UL></BLOCKQUOTE></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">
      <BLOCKQUOTE>
        <P><B>=C1=ED=BC=FB=A3=BA</B></P>
        <UL>
          <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
          =
href=3D"http://download-west.oracle.com/docs/cd/B19306_01/backup.102/b141=
91/toc.htm">Oracle=20
          Database Backup and Recovery Advanced User's Guide</A>=20
          <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
          =
href=3D"http://download-west.oracle.com/docs/cd/B19306_01/backup.102/b141=
94/toc.htm">Oracle=20
          Database Backup and Recovery Reference</A> =
</LI></UL></BLOCKQUOTE></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">079</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">
      <H2><A name=3De.15.2.1></A>Overview of Media Recovery</H2></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">
      <H2><A name=3Dc.15.2.1></A>15.2.1 =
=BD=E9=D6=CA=BB=D6=B8=B4=B8=C5=CA=F6</H2></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">080</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">The =
type of recovery=20
      that takes a backup and applies redo is called media recovery. =
Media=20
      recovery updates a backup to either to the current or to a =
specified prior=20
      time. Typically, the term "media recovery" refers to recovery of=20
      datafiles. <SPAN style=3D"BACKGROUND-COLOR: #ffff00">Block media =
recovery is=20
      a more specialized operation that you use when just a few blocks =
in one or=20
      more files have been corrupted.</SPAN> In any case, you always use =
a=20
      restored backup to perform the recovery.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft =
width=3D"48%">=CF=C8=C0=FB=D3=C3=B1=B8=B7=DD=B8=B4=D4=AD=A3=A8restore=A3=A9=
=CA=FD=BE=DD=D4=D9=D3=A6=D3=C3=D6=D8=D7=F6=C8=D5=D6=BE=A3=A8redo=20
      =
log=A3=A9=B5=C4=BB=D6=B8=B4=A3=A8recovery=A3=A9=B7=BD=CA=BD=B1=BB=B3=C6=CE=
=AA=BD=E9=D6=CA=BB=D6=B8=B4=A3=A8media=20
      =
recovery=A3=A9=A1=A3=BD=E9=D6=CA=BB=D6=B8=B4=C4=DC=BD=AB=D2=BB=B8=F6=B8=B4=
=D4=AD=B5=C4=B1=B8=B7=DD=B8=FC=D0=C2=B5=BD=B5=B1=C7=B0=CA=B1=BC=E4=B5=E3=BB=
=F2=D6=AE=C7=B0=C4=B3=B8=F6=D6=B8=B6=A8=B5=C4=CA=B1=BC=E4=B5=E3=A1=A3=CD=A8=
=B3=A3=A1=B0=BD=E9=D6=CA=BB=D6=B8=B4=A1=B1=D5=E2=B8=F6=CA=F5=D3=EF=D7=A8=D6=
=B8=B6=D4=CA=FD=BE=DD=CE=C4=BC=FE=BD=F8=D0=D0=BB=D6=B8=B4=B5=C4=B9=FD=B3=CC=
=A1=A3=B6=F8=CA=FD=BE=DD=BF=E9=BD=E9=D6=CA=BB=D6=B8=B4=A3=A8block=20
      media=20
  =
recovery=A3=A9=D6=B8=CA=FD=BE=DD=CE=C4=BC=FE=D6=D0=B5=C4=B8=F6=B1=F0=CA=FD=
=BE=DD=BF=E9=B3=F6=CF=D6=B4=ED=CE=F3=CA=B1=BD=F8=D0=D0=B5=C4=CC=D8=CA=E2=BB=
=D6=B8=B4=B2=D9=D7=F7=A1=A3=CE=DE=C2=DB=BD=F8=D0=D0=C4=C4=D6=D6=BB=D6=B8=B4=
=A3=AC=CA=D7=CF=C8=B6=BC=D0=E8=D2=AA=CA=B9=D3=C3=B1=B8=B7=DD=B8=B4=D4=AD=CA=
=FD=BE=DD=A1=A3<BR>=A1=A1</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">081</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">This =
section=20
      contains the following topics:
      <UL>
        <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
        =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#e.15.2.1.1"=20
        target=3D_self>Complete Recovery</A>=20
        <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
        =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#e.15.2.1.2"=20
        target=3D_self>Incomplete Recovery</A>=20
        <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
        =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#e.15.2.1.3"=20
        target=3D_self>Datafile Media Recovery</A>=20
        <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
        =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#e.15.2.1.4"=20
        target=3D_self>Block Media Recovery</A> </LI></UL></TD>
    <TD vAlign=3Dtop align=3Dleft =
width=3D"48%">=B1=BE=BD=DA=B0=FC=BA=AC=D2=D4=CF=C2=D6=F7=CC=E2=A3=BA
      <UL>
        <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
        =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#c.15.2.1.1"=20
        target=3D_self>=CD=EA=C8=AB=BB=D6=B8=B4</A>=20
        <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
        =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#c.15.2.1.2"=20
        target=3D_self>=B2=BB=CD=EA=C8=AB=BB=D6=B8=B4</A>=20
        <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
        =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#c.15.2.1.3"=20
        =
target=3D_self>=CA=FD=BE=DD=CE=C4=BC=FE=BD=E9=D6=CA=BB=D6=B8=B4</A>=20
        <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
        =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#c.15.2.1.4"=20
        target=3D_self>=CA=FD=BE=DD=BF=E9=BD=E9=D6=CA=BB=D6=B8=B4</A> =
</LI></UL></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">082</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">
      <H3><A name=3De.15.2.1.1></A>Complete Recovery</H3></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">
      <H3><A name=3Dc.15.2.1.1></A>15.2.1.1 =
=CD=EA=C8=AB=BB=D6=B8=B4</H3></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">083</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"48%">Complete recovery=20
      involves using redo data or incremental backups combined with a =
backup of=20
      a database, tablespace, or datafile to update it to the most =
current point=20
      in time. It is called complete because Oracle applies all of the =
redo=20
      changes contained in the archived and online logs to the backup.=20
      Typically, you perform complete media recovery after a media =
failure=20
      damages datafiles or the control file.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft =
width=3D"48%">=CD=EA=C8=AB=BB=D6=B8=B4=A3=A8complete=20
      =
recovery=A3=A9=B0=FC=C0=A8=C1=BD=B8=F6=B2=BD=D6=E8=A3=BA=CA=D7=CF=C8=CA=B9=
=D3=C3=CA=FD=BE=DD=BF=E2=A3=AC=B1=ED=BF=D5=BC=E4=BB=F2=CA=FD=BE=DD=CE=C4=BC=
=FE=A3=A8datafile=A3=A9=B5=C4=B1=B8=B7=DD=BD=F8=D0=D0=B8=B4=D4=AD=A3=AC=D4=
=D9=CA=B9=D3=C3=D6=D8=D7=F6=CA=FD=BE=DD=A3=A8redo=20
      data=A3=A9=BB=F2=D4=F6=C1=BF=B1=B8=B7=DD=A3=A8incremental =
backup=A3=A9=BD=AB=CA=FD=BE=DD=B8=FC=D0=C2=B5=BD=B5=B1=C7=B0=CA=B1=BC=E4=B5=
=E3=A1=A3=D6=AE=CB=F9=D2=D4=B3=C6=D5=E2=D1=F9=B5=C4=BB=D6=B8=B4=CE=AA=CD=EA=
=C8=AB=BB=D6=B8=B4=A3=AC=CA=C7=D2=F2=CE=AA Oracle=20
      =
=BD=AB=CA=B9=D3=C3=B9=E9=B5=B5=BC=B0=C1=AA=BB=FA=D6=D8=D7=F6=C8=D5=D6=BE=A3=
=A8archived and online=20
      =
log=A3=A9=D6=D0=B5=C4=CB=F9=D3=D0=D6=D8=D7=F6=D0=C5=CF=A2=BD=F8=D0=D0=BB=D6=
=B8=B4=A3=AC=BC=B4=BB=D6=B8=B4=B5=BD=B5=B1=C7=B0=CA=B1=BC=E4=B5=E3=A1=A3=CD=
=A8=B3=A3=A3=AC=B5=B1=B3=F6=CF=D6=BD=E9=D6=CA=B9=CA=D5=CF=A3=A8media =
failure=A3=A9=B5=BC=D6=C2=CA=FD=BE=DD=CE=C4=BC=FE=BB=F2=BF=D8=D6=C6=CE=C4=
=BC=FE=A3=A8control=20
      =
file=A3=A9=CB=F0=BB=B5=CA=B1=A3=AC=D0=E8=D2=AA=D3=C3=BB=A7=BD=F8=D0=D0=BD=
=E9=D6=CA=BB=D6=B8=B4=A1=A3<BR>=A1=A1</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">084</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">You =
can perform=20
      complete recovery on a database, tablespace, or datafile. If you =
are=20
      performing complete recovery on the whole database, then you must:
      <UL>
        <LI style=3D"MARGIN-BOTTOM: 10px">Mount the database=20
        <LI style=3D"MARGIN-BOTTOM: 10px">Ensure that all datafiles you =
want to=20
        recover are online=20
        <LI style=3D"MARGIN-BOTTOM: 10px">Restore a backup of the whole =
database=20
        or the files you want to recover=20
        <LI style=3D"MARGIN-BOTTOM: 10px">Apply online or archived redo =
logs, or a=20
        combination of the two </LI></UL></TD>
    <TD vAlign=3Dtop align=3Dleft=20
      =
width=3D"48%">=D3=C3=BB=A7=BF=C9=D2=D4=B6=D4=CA=FD=BE=DD=BF=E2=A3=AC=B1=ED=
=BF=D5=BC=E4=A3=AC=CA=FD=BE=DD=CE=C4=BC=FE=D6=B4=D0=D0=CD=EA=C8=AB=BB=D6=B8=
=B4=A1=A3=D3=C3=BB=A7=B6=D4=D5=FB=B8=F6=CA=FD=BE=DD=BF=E2=BD=F8=D0=D0=CD=EA=
=C8=AB=BB=D6=B8=B4=CA=B1=B1=D8=D0=EB=C2=FA=D7=E3=D2=D4=CF=C2=CC=F5=BC=FE=A3=
=BA
      <UL>
        <LI style=3D"MARGIN-BOTTOM: =
10px">=B9=D2=D4=D8=A3=A8mount=A3=A9=CA=FD=BE=DD=BF=E2=20
        <LI style=3D"MARGIN-BOTTOM: =
10px">=C8=B7=B1=A3=CB=F9=D3=D0=D0=E8=D2=AA=B1=BB=BB=D6=B8=B4=B5=C4=CA=FD=BE=
=DD=CE=C4=BC=FE=B4=A6=D3=DA=C1=AA=BB=FA=A3=A8online=A3=A9=D7=B4=CC=AC=20
        <LI style=3D"MARGIN-BOTTOM: =
10px">=B8=B4=D4=AD=CA=FD=BE=DD=BF=E2=BB=F2=D0=E8=D2=AA=BB=D6=B8=B4=B5=C4=CA=
=FD=BE=DD=CE=C4=BC=FE=20
        <LI style=3D"MARGIN-BOTTOM: =
10px">=D3=A6=D3=C3=C1=AA=BB=FA=D6=D8=D7=F6=C8=D5=D6=BE=BB=F2/=D3=EB=B9=E9=
=B5=B5=D6=D8=D7=F6=C8=D5=D6=BE </LI></UL></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">085</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">If you =
are=20
      performing complete recovery on a tablespace or datafile, then you =
must:
      <UL>
        <LI style=3D"MARGIN-BOTTOM: 10px">Take the tablespace or =
datafile to be=20
        recovered offline if the database is open=20
        <LI style=3D"MARGIN-BOTTOM: 10px">Restore a backup of the =
datafiles you=20
        want to recover=20
        <LI style=3D"MARGIN-BOTTOM: 10px">Apply online or archived redo =
logs, or a=20
        combination of the two </LI></UL></TD>
    <TD vAlign=3Dtop align=3Dleft =
width=3D"48%">=D3=C3=BB=A7=B6=D4=B1=ED=BF=D5=BC=E4=BC=B0=CA=FD=BE=DD=CE=C4=
=BC=FE=BD=F8=D0=D0=CD=EA=C8=AB=BB=D6=B8=B4=CA=B1=B1=D8=D0=EB=C2=FA=D7=E3=D2=
=D4=CF=C2=CC=F5=BC=FE=A3=BA
      <UL>
        <LI=20
        style=3D"MARGIN-BOTTOM: =
10px">=C8=E7=B9=FB=CA=FD=BE=DD=BF=E2=B4=A6=D3=DA=B4=F2=BF=AA=D7=B4=CC=AC=A3=
=AC=D3=A6=BD=AB=D0=E8=D2=AA=BB=D6=B8=B4=B5=C4=B1=ED=BF=D5=BC=E4=BB=F2=CA=FD=
=BE=DD=CE=C4=BC=FE=D6=C3=CE=AA=CD=D1=BB=FA=A3=A8offline=A3=A9=D7=B4=CC=AC=
=20
        <LI style=3D"MARGIN-BOTTOM: =
10px">=B8=B4=D4=AD=D0=E8=D2=AA=BB=D6=B8=B4=B5=C4=CA=FD=BE=DD=CE=C4=BC=FE =

        <LI style=3D"MARGIN-BOTTOM: =
10px">=D3=A6=D3=C3=C1=AA=BB=FA=D6=D8=D7=F6=C8=D5=D6=BE=BB=F2/=D3=EB=B9=E9=
=B5=B5=D6=D8=D7=F6=C8=D5=D6=BE </LI></UL></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">086</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">
      <H3><A name=3De.15.2.1.2></A>Incomplete Recovery</H3></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">
      <H3><A name=3Dc.15.2.1.2></A>15.2.1.2 =
=B2=BB=CD=EA=C8=AB=BB=D6=B8=B4</H3></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">087</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"48%">Incomplete recovery,=20
      or <SPAN style=3D"BACKGROUND-COLOR: #ffff00">point-in-time =
recovery</SPAN>,=20
      uses a backup to produce a noncurrent version of the database. In =
other=20
      words, you do not apply all of the redo records generated after =
the most=20
      recent backup. You usually perform incomplete recovery of the =
whole=20
      database in the following situations:
      <UL>
        <LI style=3D"MARGIN-BOTTOM: 10px">Media failure destroys some or =
all of=20
        the online redo logs.=20
        <LI style=3D"MARGIN-BOTTOM: 10px">A user error causes data loss, =
for=20
        example, a user inadvertently drops a table.=20
        <LI style=3D"MARGIN-BOTTOM: 10px">You cannot perform complete =
recovery=20
        because an archived redo log is missing.=20
        <LI style=3D"MARGIN-BOTTOM: 10px">You lose your current control =
file and=20
        must use a backup control file to open the database. =
</LI></UL></TD>
    <TD vAlign=3Dtop align=3Dleft =
width=3D"48%">=B2=BB=CD=EA=C8=AB=BB=D6=B8=B4=A3=A8incomplete=20
      =
recovery=A3=A9=A3=AC=D2=B2=B1=BB=B3=C6=CE=AA=B0=B4=CA=B1=BC=E4=B5=E3=BB=D6=
=B8=B4=A3=A8point-in-time=20
      =
recovery=A3=A9=A3=AC=D6=B8=C3=BB=D3=D0=BD=AB=CA=FD=BE=DD=BF=E2=BB=D6=B8=B4=
=B5=BD=B5=B1=C7=B0=CA=B1=BC=E4=B5=E3=B5=C4=BB=D6=B8=B4=A1=A3=BB=BB=BE=E4=BB=
=B0=CB=B5=A3=AC=D3=C3=BB=A7=C3=BB=D3=D0=BD=AB=D7=EE=BD=FC=D2=BB=B4=CE=B1=B8=
=B7=DD=D6=AE=BA=F3=B2=FA=C9=FA=B5=C4=CB=F9=D3=D0=D6=D8=D7=F6=C8=D5=D6=BE=D3=
=A6=D3=C3=B5=BD=B8=B4=D4=AD=B5=C4=CA=FD=BE=DD=BF=E2=C9=CF=A1=A3=D3=C3=BB=A7=
=CD=A8=B3=A3=D4=DA=CF=C2=C1=D0=C7=E9=BF=F6=B3=F6=CF=D6=CA=B1=B6=D4=CA=FD=BE=
=DD=BF=E2=BD=F8=D0=D0=B2=BB=CD=EA=C8=AB=BB=D6=B8=B4=A3=BA
      <UL>
        <LI style=3D"MARGIN-BOTTOM: =
10px">=BD=E9=D6=CA=B9=CA=D5=CF=A3=A8media =
failure=A3=A9=B5=BC=D6=C2=B2=BF=B7=D6=BB=F2=C8=AB=B2=BF=C1=AA=BB=FA=D6=D8=
=D7=F6=C8=D5=D6=BE=A3=A8online=20
        redo log=A3=A9=CB=F0=BB=B5=A1=A3=20
        <LI style=3D"MARGIN-BOTTOM: =
10px">=D3=C3=BB=A7=B2=D9=D7=F7=CA=A7=CE=F3=A3=A8user =
error=A3=A9=B5=BC=D6=C2=CA=FD=BE=DD=B6=AA=CA=A7=A3=AC=C0=FD=C8=E7=A3=AC=D3=
=C3=BB=A7=D3=C9=D3=DA=CA=E8=BA=F6=B6=F8=D2=C6=B3=FD=C1=CB=B1=ED=A1=A3=20

        <LI style=3D"MARGIN-BOTTOM: =
10px">=D3=C9=D3=DA=B9=E9=B5=B5=D6=D8=D7=F6=C8=D5=D6=BE=A3=A8archived =
redo=20
        =
log=A3=A9=B6=AA=CA=A7=B6=F8=CE=DE=B7=A8=BD=F8=D0=D0=CD=EA=C8=AB=BB=D6=B8=B4=
=A3=A8complete recovery=A3=A9=A1=A3=20
        <LI style=3D"MARGIN-BOTTOM: =
10px">=B5=B1=C7=B0=BF=D8=D6=C6=CE=C4=BC=FE=A3=A8control=20
        =
file=A3=A9=B6=AA=CA=A7=A3=AC=B1=D8=D0=EB=CA=B9=D3=C3=B1=B8=B7=DD=B5=C4=BF=
=D8=D6=C6=CE=C4=BC=FE=B4=F2=BF=AA=A3=A8open=A3=A9=CA=FD=BE=DD=BF=E2=A1=A3=
 </LI></UL></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">088</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">To =
perform=20
      incomplete media recovery, you must restore all datafiles from =
backups=20
      created prior to the time to which you want to recover and then =
open the=20
      database with the <FONT color=3D#0000ff>RESETLOGS</FONT> option =
when=20
      recovery completes. <SPAN style=3D"BACKGROUND-COLOR: #ffff00">The=20
      </SPAN><FONT color=3D#0000ff><SPAN=20
      style=3D"BACKGROUND-COLOR: #ffff00">RESETLOGS</SPAN></FONT><SPAN=20
      style=3D"BACKGROUND-COLOR: #ffff00"> operation creates a new =
incarnation of=20
      the database=A1=AAin other words, a database with a new stream of =
log sequence=20
      numbers starting with log sequence 1.</SPAN><BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft =
width=3D"48%">=D6=B4=D0=D0=B2=BB=CD=EA=C8=AB=BD=E9=D6=CA=BB=D6=B8=B4=A3=A8=
incomplete media=20
      =
recovery=A3=A9=CA=B1=A3=AC=D3=C3=BB=A7=D0=E8=D2=AA=CA=B9=D3=C3=D6=B8=B6=A8=
=BB=D6=B8=B4=CA=B1=BC=E4=B5=E3=D6=AE=C7=B0=B5=C4=B1=B8=B7=DD=B8=B4=D4=AD=A3=
=A8restore=A3=A9=CA=FD=BE=DD=CE=C4=BC=FE=A3=AC=B2=A2=D4=DA=BB=D6=B8=B4=A3=
=A8recovery=A3=A9=BD=E1=CA=F8=B4=F2=BF=AA=A3=A8open=A3=A9=CA=FD=BE=DD=BF=E2=
=CA=B1=CA=B9=D3=C3=20
      <FONT color=3D#0000ff>RESETLOGS</FONT> =D1=A1=CF=EE=A1=A3<FONT=20
      color=3D#0000ff>RESETLOGS</FONT> =
=D1=A1=CF=EE=B5=C4=BA=AC=D2=E5=CA=C7=CA=B9=B5=B1=C7=B0=B5=C4=CA=FD=BE=DD=BF=
=E2=BC=B0=D6=D8=D7=F6=C8=D5=D6=BE=D3=D0=D0=A7=A3=AC=BC=B4=C1=EE=CA=FD=BE=DD=
=BF=E2=CA=B9=D3=C3=D2=BB=CC=D7=D0=C2=B5=C4=C8=D5=D6=BE=D0=F2=C1=D0=BA=C5=A3=
=A8=B4=D3 1=20
      =BF=AA=CA=BC=A3=A9=A1=A3<BR>=A1=A1</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">089</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">Before =
using the=20
      <FONT color=3D#0000ff>OPEN RESETLOGS</FONT> command to open the =
database in=20
      read/write mode after an incomplete recovery, it is a good idea to =
first=20
      open the database in read-only mode, and inspect the data to make =
sure=20
      that the database was recovered to the correct point. If the =
recovery was=20
      done to the wrong point, then it is easier to re-run the recovery =
if no=20
      <FONT color=3D#0000ff>OPEN RESETLOGS</FONT> has been done. If you =
open the=20
      database read-only and discover that not enough recovery was done, =
then=20
      just run the recovery again to the desired time. If you discover =
that too=20
      much recovery was done, then you must restore the database again =
and=20
      re-run the recovery.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft =
width=3D"48%">=D4=DA=CD=EA=B3=C9=C1=CB=B2=BB=CD=EA=C8=AB=BB=D6=B8=B4=BA=F3=
=A3=AC=BD=A8=D2=E9=B2=BB=D2=AA=D6=B1=BD=D3=CA=B9=D3=C3 <FONT=20
      color=3D#0000ff>OPEN RESETLOGS</FONT>=20
      =
=C3=FC=C1=EE=D2=D4=B6=C1/=D0=B4=C4=A3=CA=BD=B4=F2=BF=AA=A3=A8open=A3=A9=CA=
=FD=BE=DD=BF=E2=A3=AC=B6=F8=D3=A6=CF=C8=D2=D4=D6=BB=B6=C1=C4=A3=CA=BD=B4=F2=
=BF=AA=CA=FD=BE=DD=BF=E2=A3=AC=B2=A2=BC=EC=B2=E9=CA=C7=B7=F1=D2=D1=BD=AB=CA=
=FD=BE=DD=BF=E2=BB=D6=B8=B4=B5=BD=D5=FD=C8=B7=B5=C4=CA=B1=BC=E4=B5=E3=A1=A3=
=C8=E7=B9=FB=BB=D6=B8=B4=B5=C4=CA=B1=BC=E4=B5=E3=D3=D0=CE=F3=A3=AC=D4=DA=C3=
=BB=D3=D0=CA=B9=D3=C3=20
      <FONT color=3D#0000ff>OPEN RESETLOGS</FONT>=20
      =
=C3=FC=C1=EE=B5=C4=C7=E9=BF=F6=CF=C2=A3=AC=D6=D8=D0=C2=D6=B4=D0=D0=BB=D6=B8=
=B4=B2=D9=D7=F7=CF=E0=B6=D4=BC=F2=B5=A5=A1=A3=C8=E7=B9=FB=BB=D6=B8=B4=BD=E1=
=B9=FB=D4=E7=D3=DA=D6=B8=B6=A8=B5=C4=CA=B1=BC=E4=B5=E3=A3=AC=D6=BB=D0=E8=D6=
=D8=D0=C2=D6=B4=D0=D0=BB=D6=B8=B4=B2=D9=D7=F7=A1=A3=C8=E7=B9=FB=BB=D6=B8=B4=
=BD=E1=B9=FB=B3=AC=B9=FD=C1=CB=D6=B8=B6=A8=B5=C4=CA=B1=BC=E4=B5=E3=A3=AC=D4=
=F2=D3=A6=D4=D9=B4=CE=B8=B4=D4=AD=CA=FD=BE=DD=BF=E2=B2=A2=D6=D8=D0=C2=BD=F8=
=D0=D0=BB=D6=B8=B4=A1=A3<BR>=A1=A1</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">090</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">
      <BLOCKQUOTE><B>Note:</B><BR><BR><SPAN=20
        style=3D"BACKGROUND-COLOR: #ffff00">Flashback Database</SPAN> is =
another=20
        way to perform incomplete recovery.</BLOCKQUOTE></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">
      <BLOCKQUOTE><B>=CC=E1=CA=BE=A3=BA</B><BR><BR>Flashback=20
      =
Database=A3=A8=BB=D8=C9=C1=CA=FD=BE=DD=BF=E2=A3=A9=D2=B2=CA=C7=D2=BB=D6=D6=
=BD=F8=D0=D0=B2=BB=CD=EA=C8=AB=BB=D6=B8=B4=B5=C4=B7=BD=B7=A8=A1=A3</BLOCK=
QUOTE></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">091</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">
      <BLOCKQUOTE><B>See Also:</B><BR><BR>"<A=20
        =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#e.15.2.3.1"=20
        target=3D_self>Overview of Oracle Flashback =
Database</A>"</BLOCKQUOTE></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">
      <BLOCKQUOTE><B>=C1=ED=BC=FB=A3=BA</B><BR><BR>=A1=B0<A=20
        =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#c.15.2.3.1"=20
        target=3D_self>Oracle Flashback Database =
=B8=C5=CA=F6</A>=A1=B1</BLOCKQUOTE></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">092</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">
      <H4><A name=3De.15.2.1.2.1></A>Tablespace Point-in-Time =
Recovery</H4></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">
      <H4><A name=3Dc.15.2.1.2.1></A>15.2.1.2.1 =
=B1=ED=BF=D5=BC=E4=B0=B4=CA=B1=BC=E4=B5=E3=BB=D6=B8=B4</H4></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">093</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">The =
tablespace=20
      point-in-time recovery (TSPITR) feature lets you recover one or =
more=20
      tablespaces to a point in time that is different from the rest of =
the=20
      database. TSPITR is most useful when you want to:
      <UL>
        <LI style=3D"MARGIN-BOTTOM: 10px">Recover from an erroneous drop =
or=20
        truncate table operation=20
        <LI style=3D"MARGIN-BOTTOM: 10px">Recover a table that has =
become=20
        logically corrupted=20
        <LI style=3D"MARGIN-BOTTOM: 10px">Recover from an incorrect =
batch job or=20
        other DML statement that has affected only a subset of the =
database=20
        <LI style=3D"MARGIN-BOTTOM: 10px">Recover one independent schema =
to a=20
        point different from the rest of a physical database (<SPAN=20
        style=3D"BACKGROUND-COLOR: #ffff00">in cases where there are =
multiple=20
        independent schemas in separate tablespaces of one physical=20
        database</SPAN>)=20
        <LI style=3D"MARGIN-BOTTOM: 10px">Recover a tablespace on a very =
large=20
        database (VLDB) rather than restore the whole database from a =
backup and=20
        perform a complete database roll-forward </LI></UL></TD>
    <TD vAlign=3Dtop align=3Dleft =
width=3D"48%">=D3=C3=BB=A7=CA=B9=D3=C3=B1=ED=BF=D5=BC=E4=B0=B4=CA=B1=BC=E4=
=B5=E3=BB=D6=B8=B4=A3=A8tablespace=20
      point-in-time =
recovery=A3=ACTSPITR=A3=A9=B9=A6=C4=DC=BF=C9=D2=D4=BD=AB=D2=BB=B8=F6=BB=F2=
=B6=E0=B8=F6=B1=ED=BF=D5=BC=E4=BB=D6=B8=B4=B5=BD=D3=EB=CA=FD=BE=DD=BF=E2=D6=
=D0=C6=E4=CB=FB=B1=ED=BF=D5=BC=E4=B2=BB=CD=AC=B5=C4=CA=B1=BC=E4=B5=E3=A1=A3=
TSPITR=20
      =B6=D4=D2=D4=CF=C2=C7=E9=BF=F6=D7=EE=CE=AA=CA=CA=D3=C3=A3=BA
      <UL>
        <LI style=3D"MARGIN-BOTTOM: =
10px">=D2=F2=B4=ED=CE=F3=B5=D8=D2=C6=B3=FD=A3=A8drop=A3=A9=BC=B0=C7=E5=B3=
=FD=A3=A8truncate=A3=A9=B1=ED=B6=F8=BD=F8=D0=D0=B5=C4=BB=D6=B8=B4=20
        <LI style=3D"MARGIN-BOTTOM: =
10px">=BB=D6=B8=B4=B4=E6=D4=DA=C2=DF=BC=AD=B4=ED=CE=F3=B5=C4=B1=ED=20
        <LI style=3D"MARGIN-BOTTOM: =
10px">=D3=C9=D3=DA=B2=BB=D5=FD=C8=B7=B5=C4=C5=FA=B4=A6=C0=ED=D7=F7=D2=B5=BB=
=F2=C6=E4=CB=FB DML =
=D3=EF=BE=E4=B5=BC=D6=C2=CA=FD=BE=DD=BF=E2=D6=D0=B2=BF=B7=D6=CA=FD=BE=DD=D3=
=D0=CE=F3=A3=AC=D2=F2=B6=F8=D0=E8=D2=AA=BB=D6=B8=B4=20

        <LI=20
        style=3D"MARGIN-BOTTOM: =
10px">=B5=A5=B6=C0=BD=AB=C4=B3=B8=F6=B7=BD=B0=B8=A3=A8schema=A3=A9=BB=D6=B8=
=B4=B5=BD=D3=EB=CE=EF=C0=ED=CA=FD=BE=DD=BF=E2=D6=D0=C6=E4=CB=FB=B7=BD=B0=B8=
=B2=BB=CD=AC=B5=C4=CA=B1=BC=E4=B5=E3=A3=A8=BC=D9=C9=E8=CA=FD=BE=DD=BF=E2=D6=
=D0=B2=BB=CD=AC=B5=C4=B7=BD=B0=B8=CA=B9=D3=C3=B2=BB=CD=AC=B5=C4=B1=ED=BF=D5=
=BC=E4=A3=A9=20

        <LI style=3D"MARGIN-BOTTOM: =
10px">=BB=D6=B8=B4=B4=F3=D0=CD=CA=FD=BE=DD=BF=E2=A3=A8very large=20
        =
database=A3=ACVLDB=A3=A9=D6=D0=B5=C4=D2=BB=B8=F6=B1=ED=BF=D5=BC=E4=A3=AC=B6=
=F8=B2=BB=B1=D8=CF=C8=CA=B9=D3=C3=B1=B8=B7=DD=B8=B4=D4=AD=D5=FB=B8=F6=CA=FD=
=BE=DD=BF=E2=D4=D9=D6=B4=D0=D0=CB=F9=D3=D0=C7=B0=B9=F6=A3=A8roll-forward=A3=
=A9=B2=D9=D7=F7=20
  </LI></UL></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">094</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">TSPITR =
has the=20
      following limitations:
      <UL>
        <LI style=3D"MARGIN-BOTTOM: 10px">You cannot use it on the <FONT =

        color=3D#0000ff>SYSTEM</FONT> tablespace, an <FONT=20
        color=3D#0000ff>UNDO</FONT> tablespace, or any tablespace that =
contains=20
        rollback segments.=20
        <LI style=3D"MARGIN-BOTTOM: 10px">Tablespaces that contain =
interdependent=20
        data must be recovered together. For example, if two tables are =
in=20
        separate tablespaces and have a foreign key relationship, then =
both=20
        tablespaces must be recovered at the same time; you cannot =
recover just=20
        one of them. Oracle can enforce this limitation when it detects =
data=20
        relationships that have been explicitly declared with database=20
        constraints. There could be other data relationships that are =
not=20
        declared with database constraints. Oracle cannot detect these, =
and the=20
        DBA must be careful to always restore a consistent set of =
tablespaces.=20
        </LI></UL></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">TSPITR =
=B9=A6=C4=DC=B4=E6=D4=DA=D2=D4=CF=C2=CF=DE=D6=C6=A3=BA
      <UL>
        <LI style=3D"MARGIN-BOTTOM: 10px"><FONT =
color=3D#0000ff>SYSTEM</FONT>=20
        =B1=ED=BF=D5=BC=E4=A3=AC<FONT color=3D#0000ff>UNDO</FONT> =
=B1=ED=BF=D5=BC=E4=A3=AC=BB=F2=C8=CE=BA=CE=B0=FC=BA=AC=BB=D8=B9=F6=B6=CE=A3=
=A8rollback=20
        segment=A3=A9=B5=C4=B1=ED=BF=D5=BC=E4=CE=DE=B7=A8=CA=B9=D3=C3 =
TSPITR =B9=A6=C4=DC=A1=A3=20
        <LI=20
        style=3D"MARGIN-BOTTOM: =
10px">=C8=E7=B9=FB=BC=B8=B8=F6=B1=ED=BF=D5=BC=E4=D6=D0=B4=E6=D4=DA=CF=E0=BB=
=A5=D2=C0=C0=B5=B5=C4=CA=FD=BE=DD=A3=AC=D4=F2=CB=FD=C3=C7=B1=D8=D0=EB=CD=AC=
=CA=B1=BD=F8=D0=D0=BB=D6=B8=B4=B2=D9=D7=F7=A1=A3=C0=FD=C8=E7=A3=AC=C1=BD=B8=
=F6=B1=ED=CE=BB=D3=DA=B2=BB=CD=AC=B5=C4=B1=ED=BF=D5=BC=E4=D6=D0=C7=D2=B4=E6=
=D4=DA=CD=E2=BC=FC=B9=D8=CF=B5=A3=A8foreign=20
        key =
relationship=A3=A9=A3=AC=C4=C7=C3=B4=D5=E2=C1=BD=B8=F6=B1=ED=BF=D5=BC=E4=B1=
=D8=D0=EB=CD=AC=CA=B1=BB=D6=B8=B4=A1=A3=C8=E7=B9=FB Oracle =
=B7=A2=CF=D6=C1=CB=CD=A8=B9=FD=CA=FD=BE=DD=BF=E2=D4=BC=CA=F8=A3=A8databas=
e=20
        =
constraint=A3=A9=CF=D4=CA=BD=B5=D8=C9=F9=C3=F7=B5=C4=CA=FD=BE=DD=BC=E4=B9=
=D8=CF=B5=A3=AC=BE=CD=BD=AB=C7=BF=D6=C6=B1=A3=D6=A4=D5=E2=D6=D6=BB=D6=B8=B4=
=B5=C4=CD=AC=CA=B1=D0=D4=A1=A3=D4=DA=CA=FD=BE=DD=BF=E2=D6=D0=A3=AC=D3=D0=D0=
=A9=CA=FD=BE=DD=B9=D8=CF=B5=BF=C9=C4=DC=C3=BB=D3=D0=CD=A8=B9=FD=CA=FD=BE=DD=
=BF=E2=D4=BC=CA=F8=CF=D4=CA=BD=B5=D8=C9=F9=C3=F7=A1=A3Oracle=20
        =
=CE=DE=B7=A8=B7=A2=CF=D6=D5=E2=D1=F9=B5=C4=B9=D8=CF=B5=A3=AC=B4=CB=CA=B1 =
DBA =
=B1=D8=D0=EB=C8=B7=B1=A3=CF=E0=B9=D8=B1=ED=BF=D5=BC=E4=D4=DA=BB=D6=B8=B4=CA=
=B1=C2=FA=D7=E3=D2=BB=D6=C2=D0=D4=B5=C4=D2=AA=C7=F3=A1=A3 =
</LI></UL></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">095</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">
      <BLOCKQUOTE><B>See Also:</B><BR><BR><A=20
        =
href=3D"http://download-west.oracle.com/docs/cd/B19306_01/backup.102/b141=
91/toc.htm">Oracle=20
        Database Backup and Recovery Advanced User's Guide</A> and <A=20
        =
href=3D"http://download-west.oracle.com/docs/cd/B19306_01/backup.102/b141=
94/toc.htm">Oracle=20
        Database Backup and Recovery</A> Reference for more information =
on=20
        TSPITR </BLOCKQUOTE></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">
      <BLOCKQUOTE><B>=C1=ED=BC=FB=A3=BA</B><BR><BR><A=20
        =
href=3D"http://download-west.oracle.com/docs/cd/B19306_01/backup.102/b141=
91/toc.htm">Oracle=20
        Database Backup and Recovery Advanced User's Guide</A> =BC=B0 <A =

        =
href=3D"http://download-west.oracle.com/docs/cd/B19306_01/backup.102/b141=
94/toc.htm">Oracle=20
        Database Backup and Recovery Reference</A> =
=C1=CB=BD=E2=B9=D8=D3=DA TSPITR=20
    =B5=C4=CF=EA=CF=B8=D0=C5=CF=A2</BLOCKQUOTE></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">096</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">
      <H4><A name=3De.15.2.1.2.2></A>Incomplete Media Recovery =
Options</H4></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">
      <H4><A name=3Dc.15.2.1.2.2></A>15.2.1.2.2 =
=B2=BB=CD=EA=C8=AB=BD=E9=D6=CA=BB=D6=B8=B4=D1=A1=CF=EE</H4></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">097</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"48%">Because you are not=20
      completely recovering the database to the most current time, you =
must tell=20
      Oracle when to terminate recovery. You can perform the following =
types of=20
      media recovery.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft =
width=3D"48%">=D4=DA=B2=BB=CD=EA=C8=AB=BB=D6=B8=B4=A3=A8incomplete=20
      =
recovery=A3=A9=D6=D0=A3=AC=D3=C9=D3=DA=C3=BB=D3=D0=BD=AB=CA=FD=BE=DD=BF=E2=
=BB=D6=B8=B4=B5=BD=B5=B1=C7=B0=CA=B1=BC=E4=B5=E3=A3=AC=D3=C3=BB=A7=B1=D8=D0=
=EB=B8=E6=D6=AA Oracle=20
      =
=D4=DA=BA=CE=CA=B1=D6=D5=D6=B9=BB=D6=B8=B4=A3=A8recovery=A3=A9=A1=A3=BD=E9=
=D6=CA=BB=D6=B8=B4=D3=D0=D2=D4=CF=C2=BC=B8=D6=D6=C0=E0=D0=CD=A1=A3<BR>=A1=
=A1</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">098</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">
      <TABLE id=3Dtable20 width=3D"100%" border=3D0>
        <TBODY>
        <TR>
          <TD colSpan=3D2>
            <HR>
          </TD></TR>
        <TR>
          <TD vAlign=3Dtop><FONT color=3D#0000ff><B>Type of =
Recovery</B></FONT></TD>
          <TD vAlign=3Dtop><FONT =
color=3D#0000ff><B>Function</B></FONT></TD></TR>
        <TR>
          <TD colSpan=3D2>
            <HR>
          </TD></TR>
        <TR>
          <TD vAlign=3Dtop>Time-based recovery</TD>
          <TD vAlign=3Dtop>Recovers the data up to a specified point in=20
            time.<BR>=A1=A1</TD></TR>
        <TR>
          <TD vAlign=3Dtop>Cancel-based recovery</TD>
          <TD vAlign=3Dtop>Recovers until you issue the <FONT=20
            color=3D#0000ff>CANCEL</FONT> statement (not available when =
using=20
            <SPAN style=3D"BACKGROUND-COLOR: #ffff00">Recovery=20
            Manager</SPAN>).<BR>=A1=A1</TD></TR>
        <TR>
          <TD vAlign=3Dtop>Change-based recovery<BR>=A1=A1</TD>
          <TD vAlign=3Dtop>Recovers until the specified SCN.</TD></TR>
        <TR>
          <TD vAlign=3Dtop>Log sequence recovery</TD>
          <TD vAlign=3Dtop>Recovers until the specified log sequence =
number=20
            (only available when using Recovery=20
      Manager).<BR>=A1=A1</TD></TR></TBODY></TABLE>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">
      <TABLE id=3Dtable21 width=3D"100%" border=3D0>
        <TBODY>
        <TR>
          <TD colSpan=3D2>
            <HR>
          </TD></TR>
        <TR>
          <TD vAlign=3Dtop><FONT =
color=3D#0000ff><B>=BB=D6=B8=B4=B5=C4=C0=E0=D0=CD<BR>=A1=A1</B></FONT></T=
D>
          <TD vAlign=3Dtop><FONT =
color=3D#0000ff><B>=B9=A6=C4=DC<BR>=A1=A1</B></FONT></TD></TR>
        <TR>
          <TD colSpan=3D2>
            <HR>
          </TD></TR>
        <TR>
          <TD =
vAlign=3Dtop>=BB=F9=D3=DA=CA=B1=BC=E4=B5=C4=BB=D6=B8=B4=A3=A8Time-based =
recovery=A3=A9<BR>=A1=A1</TD>
          <TD =
vAlign=3Dtop>=BD=AB=CA=FD=BE=DD=BB=D6=B8=B4=B5=BD=D6=B8=B6=A8=B5=C4=CA=B1=
=BC=E4=B5=E3=A1=A3<BR>=A1=A1</TD></TR>
        <TR>
          <TD =
vAlign=3Dtop>=D3=C3=BB=A7=BF=D8=D6=C6=B5=C4=BB=D6=B8=B4=A3=A8Cancel-based=
 recovery=A3=A9</TD>
          <TD vAlign=3Dtop>=B5=B1=D3=C3=BB=A7=CC=E1=BD=BB <FONT =
color=3D#0000ff>CANCEL</FONT>=20
            =
=D3=EF=BE=E4=BA=F3=CD=A3=D6=B9=BB=D6=B8=B4=B2=D9=D7=F7(=B4=CB=D1=A1=CF=EE=
=D4=DA=CA=B9=D3=C3 Recovery =
Manager=A3=A8=BB=D6=B8=B4=B9=DC=C0=ED=C6=F7=A3=A9=CA=B1=CE=DE=D0=A7).<BR>=
=A1=A1</TD></TR>
        <TR>
          <TD vAlign=3Dtop>=BB=F9=D3=DA SCN =
=B5=C4=BB=D6=B8=B4=A3=A8Change-based recovery=A3=A9<BR>=A1=A1</TD>
          <TD =
vAlign=3Dtop>=BD=AB=CA=FD=BE=DD=BB=D6=B8=B4=B5=BD=D6=B8=B6=A8=B5=C4 =
SCN=A1=A3</TD></TR>
        <TR>
          <TD =
vAlign=3Dtop>=B0=B4=D6=D8=D7=F6=C8=D5=D6=BE=D0=F2=BA=C5=BB=D6=B8=B4=A3=A8=
Log sequence recovery=A3=A9<BR>=A1=A1</TD>
          <TD =
vAlign=3Dtop>=BD=AB=CA=FD=BE=DD=BB=D6=B8=B4=B5=BD=D6=B8=B6=A8=B5=C4=D6=D8=
=D7=F6=C8=D5=D6=BE=D0=F2=BA=C5 =
(=B4=CB=D1=A1=CF=EE=D6=BB=D4=DA=CA=B9=D3=C3 Recovery Manager=20
          =
=CA=B1=D3=D0=D0=A7)=A1=A3<BR>=A1=A1</TD></TR></TBODY></TABLE>=A1=A1</TD><=
/TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">099</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">
      <H3><A name=3De.15.2.1.3></A>Datafile Media Recovery</H3></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">
      <H3><A name=3Dc.15.2.1.3></A>15.2.1.3 =
=CA=FD=BE=DD=CE=C4=BC=FE=BD=E9=D6=CA=BB=D6=B8=B4</H3></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">100</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"48%">Datafile media=20
      recovery is used to recover from a lost or damaged current =
datafile or=20
      control file. It is also used to recover changes that were lost =
when a=20
      tablespace went offline without the <FONT color=3D#0000ff>OFFLINE=20
      NORMAL</FONT> option. Both datafile media recovery and instance =
recovery=20
      must repair database integrity. However, these types of recovery =
differ=20
      with respect to their additional features. Media recovery has the=20
      following characteristics:
      <UL>
        <LI style=3D"MARGIN-BOTTOM: 10px">Applies changes to restored =
backups of=20
        damaged datafiles.=20
        <LI style=3D"MARGIN-BOTTOM: 10px">Can use archived logs as well =
as online=20
        logs.=20
        <LI style=3D"MARGIN-BOTTOM: 10px">Requires explicit invocation =
by a user.=20
        <LI style=3D"MARGIN-BOTTOM: 10px">Does not detect media failure =
(that is,=20
        the need to restore a backup) automatically. After a backup has =
been=20
        restored, however, detection of the need to recover it through =
media=20
        recovery is automatic.=20
        <LI style=3D"MARGIN-BOTTOM: 10px">Has a recovery time governed =
solely by=20
        user policy (for example, frequency of backups, parallel =
recovery=20
        parameters, number of database transactions since the last =
backup)=20
        rather than by Oracle internal mechanisms. </LI></UL></TD>
    <TD vAlign=3Dtop align=3Dleft =
width=3D"48%">=CA=FD=BE=DD=CE=C4=BC=FE=BD=E9=D6=CA=BB=D6=B8=B4=A3=A8dataf=
ile media=20
      =
recovery=A3=A9=D3=C3=D3=DA=B6=D4=B6=AA=CA=A7=BB=F2=CB=F0=BB=B5=B5=C4=CA=FD=
=BE=DD=CE=C4=BC=FE=A3=A8datafile=A3=A9=BC=B0=BF=D8=D6=C6=CE=C4=BC=FE=A3=A8=
control=20
      =
file=A3=A9=BD=F8=D0=D0=BB=D6=B8=B4=A3=A8recover=A3=A9=A1=A3=CB=FD=D2=B2=BF=
=C9=BB=D6=B8=B4=D2=F2=C3=BB=D3=D0=CA=B9=D3=C3 <FONT =
color=3D#0000ff>OFFLINE NORMAL</FONT>=20
      =
=D1=A1=CF=EE=D6=B4=D0=D0=CD=D1=BB=FA=B2=D9=D7=F7=B6=F8=D4=EC=B3=C9=CA=FD=BE=
=DD=B6=AA=CA=A7=B5=C4=B1=ED=BF=D5=BC=E4=A1=A3=CA=FD=BE=DD=CE=C4=BC=FE=BD=E9=
=D6=CA=BB=D6=B8=B4=BC=B0=CA=B5=C0=FD=BB=D6=B8=B4=A3=A8instance =
recovery=A3=A9=B5=C4=D7=F7=D3=C3=B6=BC=CA=C7=D0=DE=B8=B4=CA=FD=BE=DD=BF=E2=
=CD=EA=D5=FB=D0=D4=A3=A8database=20
      =
integrity=A3=A9=A1=A3=B5=AB=CA=C7=D5=E2=C1=BD=D6=D6=BB=D6=B8=B4=B8=F7=D3=D0=
=CB=F9=B2=BB=CD=AC=A1=A3=CA=FD=BE=DD=CE=C4=BC=FE=BD=E9=D6=CA=BB=D6=B8=B4=BE=
=DF=D3=D0=D2=D4=CF=C2=CC=D8=B5=E3=A3=BA
      <UL>
        <LI style=3D"MARGIN-BOTTOM: =
10px">=C4=DC=B9=BB=BD=AB=CA=FD=BE=DD=D0=DE=B8=C4=D3=A6=D3=C3=B5=BD=B1=BB=B8=
=B4=D4=AD=A3=A8restore=A3=A9=B5=C4=CA=DC=CB=F0=CA=FD=BE=DD=CE=C4=BC=FE=D6=
=D0=A1=A3=20
        <LI style=3D"MARGIN-BOTTOM: =
10px">=C4=DC=B9=BB=CA=B9=D3=C3=B9=E9=B5=B5=D6=D8=D7=F6=C8=D5=D6=BE=A3=A8a=
rchived redo=20
        log=A3=A9=BC=B0=C1=AA=BB=FA=D6=D8=D7=F6=C8=D5=D6=BE=A3=A8online =
redo log=A3=A9=A1=A3=20
        <LI style=3D"MARGIN-BOTTOM: =
10px">=D0=E8=D2=AA=D3=C3=BB=A7=CF=D4=CA=BD=B5=C4=D6=B4=D0=D0=A1=A3=20
        <LI style=3D"MARGIN-BOTTOM: =
10px">=B2=BB=C4=DC=D7=D4=B6=AF=B5=D8=BC=EC=B2=E2=BD=E9=D6=CA=B9=CA=D5=CF=A3=
=A8media=20
        =
failure=A3=A9=A3=A8=BC=B4=B2=BB=C4=DC=D7=D4=B6=AF=B5=D8=D6=B4=D0=D0=B8=B4=
=D4=AD=B2=D9=D7=F7=A3=A9=A1=A3=B5=AB=D4=DA=CA=B9=D3=C3=B1=B8=B7=DD=BD=F8=D0=
=D0=B8=B4=D4=AD=BA=F3=A3=AC=C4=DC=B9=BB=D7=D4=B6=AF=B5=D8=BC=EC=B2=E2=CA=C7=
=B7=F1=D0=E8=D2=AA=CD=A8=B9=FD=BD=E9=D6=CA=BB=D6=B8=B4=A3=A8media=20
        recovery=A3=A9=C0=B4=BB=D6=B8=B4=CA=FD=BE=DD=A1=A3=20
        <LI=20
        style=3D"MARGIN-BOTTOM: =
10px">=BB=D6=B8=B4=CB=F9=D0=E8=CA=B1=BC=E4=CD=EA=C8=AB=D3=C9=D3=C3=BB=A7=B5=
=C4=B1=B8=B7=DD=BB=D6=B8=B4=B2=DF=C2=D4=A3=A8=C0=FD=C8=E7=A3=AC=B1=B8=B7=DD=
=B5=C4=C6=B5=C2=CA=A3=AC=B2=A2=D0=D0=BB=D6=B8=B4=B2=CE=CA=FD=A3=AC=C9=CF=B4=
=CE=B1=B8=B7=DD=BA=F3=CA=FD=BE=DD=BF=E2=C4=DA=B5=C4=CA=C2=CE=F1=C1=BF=A3=A9=
=BE=F6=B6=A8=A3=AC=B6=F8=D3=EB=20
        Oracle =C4=DA=B2=BF=BB=FA=D6=C6=CE=DE=B9=D8=A1=A3 =
</LI></UL></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">101</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">The =
database cannot=20
      be opened if any of the online datafiles needs media recovery, nor =
can a=20
      datafile that needs media recovery be brought online until media =
recovery=20
      is complete. The following scenarios necessitate media recovery:
      <UL>
        <LI style=3D"MARGIN-BOTTOM: 10px">You restore a backup of a =
datafile.=20
        <LI style=3D"MARGIN-BOTTOM: 10px">You restore a backup control =
file (even=20
        if all datafiles are current).=20
        <LI style=3D"MARGIN-BOTTOM: 10px">A datafile is taken offline =
(either by=20
        you or automatically by Oracle) without the <FONT =
color=3D#0000ff>OFFLINE=20
        NORMAL</FONT> option. </LI></UL></TD>
    <TD vAlign=3Dtop align=3Dleft =
width=3D"48%">=C8=E7=B9=FB=CA=FD=BE=DD=BF=E2=C4=DA=B4=E6=D4=DA=D0=E8=D2=AA=
=BD=E9=D6=CA=BB=D6=B8=B4=A3=A8media=20
      =
recovery=A3=A9=B5=C4=C1=AA=BB=FA=CA=FD=BE=DD=CE=C4=BC=FE=A3=A8online=20
      =
datafile=A3=A9=A3=AC=C4=C7=C3=B4=B4=CB=CA=FD=BE=DD=BF=E2=BD=AB=CE=DE=B7=A8=
=B4=F2=BF=AA=A3=A8open=A3=A9=A3=AC=C8=E7=B9=FB=D2=BB=B8=F6=CA=FD=BE=DD=CE=
=C4=BC=FE=D0=E8=D2=AA=BD=E9=D6=CA=BB=D6=B8=B4=A3=AC=C4=C7=C3=B4=B4=CB=CE=C4=
=BC=FE=BD=AB=CE=DE=B7=A8=C1=AA=BB=FA=A1=A3=D4=DA=B3=F6=CF=D6=D2=D4=CF=C2=C7=
=E9=BF=F6=CA=B1=D0=E8=D2=AA=BD=F8=D0=D0=BD=E9=D6=CA=BB=D6=B8=B4=A3=BA
      <UL>
        <LI style=3D"MARGIN-BOTTOM: =
10px">=CA=B9=D3=C3=B1=B8=B7=DD=B8=B4=D4=AD=C1=CB=D2=BB=B8=F6=CA=FD=BE=DD=CE=
=C4=BC=FE=A1=A3=20
        <LI style=3D"MARGIN-BOTTOM: =
10px">=CA=B9=D3=C3=B1=B8=B7=DD=B8=B4=D4=AD=C1=CB=D2=BB=B8=F6=BF=D8=D6=C6=CE=
=C4=BC=FE=A3=A8=BC=B4=CA=B9=B4=CB=CA=B1=CB=F9=D3=D0=CA=FD=BE=DD=CE=C4=BC=FE=
=B6=BC=CA=C7=D7=EE=D0=C2=B5=C4=A3=A9=A1=A3=20
        <LI style=3D"MARGIN-BOTTOM: =
10px">=BD=AB=CA=FD=BE=DD=CE=C4=BC=FE=CD=D1=BB=FA=A3=A8offline=A3=A9=CA=B1=
=A3=A8=CE=DE=C2=DB=CA=C7=D3=C3=BB=A7=CA=D6=B6=AF=D6=B4=D0=D0=B5=C4=A3=AC=BB=
=B9=CA=C7 Oracle=20
        =D7=D4=B6=AF=D6=B4=D0=D0=B5=C4=A3=A9=C3=BB=D3=D0=CA=B9=D3=C3 =
<FONT color=3D#0000ff>OFFLINE NORMAL</FONT> =D1=A1=CF=EE=A1=A3 =
</LI></UL></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">102</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">Unless =
the database=20
      is not open by any instance, datafile media recovery can only =
operate on=20
      offline datafiles. You can initiate datafile media recovery before =
opening=20
      a database even when crash recovery would have sufficed. If so, =
crash=20
      recovery still runs automatically at database open.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft=20
      =
width=3D"48%">=C8=E7=B9=FB=CA=FD=BE=DD=BF=E2=D2=D1=BE=AD=B1=BB=D2=BB=B8=F6=
=CA=B5=C0=FD=B4=F2=BF=AA=A3=AC=CA=FD=BE=DD=CE=C4=BC=FE=BD=E9=D6=CA=BB=D6=B8=
=B4=BD=AB=D6=BB=C4=DC=D5=EB=B6=D4=CD=D1=BB=FA=CA=FD=BE=DD=CE=C4=BC=FE=A1=A3=
=BC=B4=B1=E3=CA=FD=BE=DD=BF=E2=D6=BB=D0=E8=BD=F8=D0=D0=B1=C0=C0=A3=BB=D6=B8=
=B4=A3=A8crash=20
      =
recovery=A3=A9=A3=AC=D3=C3=BB=A7=D2=B2=BF=C9=D2=D4=D4=DA=CA=FD=BE=DD=BF=E2=
=B4=F2=BF=AA=C7=B0=D6=B4=D0=D0=BD=E9=D6=CA=BB=D6=B8=B4=A1=A3=B4=CB=CA=B1=A3=
=AC=B1=C0=C0=A3=BB=D6=B8=B4=C8=D4=BB=E1=D4=DA=CA=FD=BE=DD=BF=E2=B4=F2=BF=AA=
=CA=B1=D7=D4=B6=AF=D4=CB=D0=D0=A1=A3<BR>=A1=A1</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">103</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">Note =
that when a=20
      file requires media recovery, you must perform media recovery even =
if all=20
      necessary changes are contained in the online logs. In other =
words, you=20
      must still run recovery even though the archived logs are not =
needed.=20
      Media recovery could find nothing to do =A1=AA and signal the =
"<SPAN=20
      style=3D"BACKGROUND-COLOR: #ffff00">no recovery required</SPAN>" =
error =A1=AA if=20
      invoked for files that do not need recovery.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft=20
      =
width=3D"48%">=D0=E8=D2=AA=D7=A2=D2=E2=B5=C4=CA=C7=A3=AC=C8=E7=B9=FB=D2=BB=
=B8=F6=CE=C4=BC=FE=D0=E8=D2=AA=BD=E9=D6=CA=BB=D6=B8=B4=A3=AC=BC=B4=CA=B9=CB=
=F9=D3=D0=B6=D4=B4=CB=CE=C4=BC=FE=B5=C4=D0=DE=B8=C4=B6=BC=B0=FC=BA=AC=D4=DA=
=C1=AA=BB=FA=D6=D8=D7=F6=C8=D5=D6=BE=CE=C4=BC=FE=D6=D0=D2=B2=B1=D8=D0=EB=BD=
=F8=D0=D0=BD=E9=D6=CA=BB=D6=B8=B4=A1=A3=D2=B2=BE=CD=CA=C7=CB=B5=A3=AC=BC=B4=
=CA=B9=CE=DE=D0=E8=D3=A6=D3=C3=B9=E9=B5=B5=D6=D8=D7=F6=C8=D5=D6=BE=D2=B2=B1=
=D8=D0=EB=BD=F8=D0=D0=BD=E9=D6=CA=BB=D6=B8=B4=A1=A3=C8=E7=B9=FB=B6=D4=CE=DE=
=D0=E8=BB=D6=B8=B4=B5=C4=CA=FD=BE=DD=CE=C4=BC=FE=D6=B4=D0=D0=C1=CB=BD=E9=D6=
=CA=BB=D6=B8=B4=A3=AC=C4=C7=C3=B4=BD=E9=D6=CA=BB=D6=B8=B4=BD=AB=B7=A2=CF=D6=
=D7=D4=BC=BA=CE=DE=D0=E8=BD=F8=D0=D0=C8=CE=BA=CE=B4=A6=C0=ED=A3=AC=B2=A2=B7=
=A2=B3=F6=A1=B0no=20
      recovery =
required=A3=A8=CE=DE=D0=E8=BB=D6=B8=B4=A3=A9=A1=B1=B4=ED=CE=F3=A1=A3<BR>=A1=
=A1</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">104</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">
      <H3><A name=3De.15.2.1.4></A>Block Media Recovery</H3></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">
      <H3><A name=3Dc.15.2.1.4></A>15.2.1.4 =
=CA=FD=BE=DD=BF=E9=BD=E9=D6=CA=BB=D6=B8=B4</H3></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">105</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">Block =
media recovery=20
      is a technique for restoring and recovering individual data blocks =
while=20
      all database files remain online and available. If corruption is =
limited=20
      to only a few blocks among a subset of database files, then block =
media=20
      recovery might be preferable to datafile recovery.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft =
width=3D"48%">=CA=FD=BE=DD=BF=E9=BD=E9=D6=CA=BB=D6=B8=B4=A3=A8block =
media=20
      =
recovery=A3=A9=C4=DC=B9=BB=D4=DA=CB=F9=D3=D0=CA=FD=BE=DD=CE=C4=BC=FE=C1=AA=
=BB=FA=C7=D2=BF=C9=D3=C3=B5=C4=C7=E9=BF=F6=CF=C2=B6=D4=B8=F6=B1=F0=B5=C4=CA=
=FD=BE=DD=BF=E9=BD=F8=D0=D0=B8=B4=D4=AD=A3=A8restore=A3=A9=BC=B0=BB=D6=B8=
=B4=A3=A8recover=A3=A9=A1=A3=C8=E7=B9=FB=CA=FD=BE=DD=B4=ED=CE=F3=BE=D6=CF=
=DE=D4=DA=C4=B3=D0=A9=CA=FD=BE=DD=CE=C4=BC=FE=B5=C4=C9=D9=C1=BF=CA=FD=BE=DD=
=BF=E9=D6=D0=A3=AC=B4=CB=CA=B1=CA=CA=D2=CB=B2=C9=D3=C3=CA=FD=BE=DD=BF=E9=BD=
=E9=D6=CA=BB=D6=B8=B4=C0=B4=B6=D4=CA=FD=BE=DD=CE=C4=BC=FE=BD=F8=D0=D0=BB=D6=
=B8=B4=A1=A3<BR>=A1=A1</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">106</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">The =
interface to=20
      block media recovery is provided by RMAN. If you do not already =
use RMAN=20
      as your principal backup and recovery solution, then you can still =
perform=20
      block media recovery by cataloging into the RMAN repository the =
necessary=20
      user-managed datafile and archived redo log =
backups.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft =
width=3D"48%">=CA=FD=BE=DD=BF=E9=BD=E9=D6=CA=BB=D6=B8=B4=CA=C7=CD=A8=B9=FD=
 RMAN =
=C0=B4=D6=B4=D0=D0=B5=C4=A1=A3=C8=E7=B9=FB=D3=C3=BB=A7=C3=BB=D3=D0=CA=B9=D3=
=C3 RMAN=20
      =
=D7=F7=CE=AA=CA=FD=BE=DD=BF=E2=B5=C4=B1=B8=B7=DD=B7=BD=B0=B8=A3=AC=BF=C9=D2=
=D4=CF=F2 RMAN =
=D7=CA=C1=CF=BF=E2=A3=A8repository=A3=A9=D6=D0=CC=ED=BC=D3=CF=E0=B9=D8=B5=
=C4=D3=C3=BB=A7=B9=DC=C0=ED=B5=C4=CA=FD=BE=DD=CE=C4=BC=FE=A3=A8user-manag=
ed=20
      =
datafile=A3=A9=D0=C5=CF=A2=BC=B0=B9=E9=B5=B5=D6=D8=D7=F6=C8=D5=D6=BE=B1=B8=
=B7=DD=A3=A8archived redo log =
backup=A3=A9=D0=C5=CF=A2=A3=AC=D5=E2=D1=F9=D2=B2=C4=DC=CA=B9=D3=C3 RMAN=20
      =
=BD=F8=D0=D0=CA=FD=BE=DD=BF=E9=BD=E9=D6=CA=BB=D6=B8=B4=A1=A3<BR>=A1=A1</T=
D></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">107</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">
      <BLOCKQUOTE><B>See Also:</B><BR><BR><A=20
        =
href=3D"http://download-west.oracle.com/docs/cd/B19306_01/backup.102/b141=
94/toc.htm">Oracle=20
        Database Backup and Recovery Reference</A> for information on =
how to=20
        catalog user-managed datafile and archived log backups and to =
perform=20
        block media recovery</BLOCKQUOTE></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">
      <BLOCKQUOTE><B>=C1=ED=BC=FB=A3=BA</B><BR><BR><A=20
        =
href=3D"http://download-west.oracle.com/docs/cd/B19306_01/backup.102/b141=
94/toc.htm">Oracle=20
        Database Backup and Recovery Reference</A> =
=C1=CB=BD=E2=C8=E7=BA=CE=CF=F2 RMAN=20
        =
=D7=CA=C1=CF=BF=E2=D6=D0=CC=ED=BC=D3=CF=E0=B9=D8=B5=C4=D3=C3=BB=A7=B9=DC=C0=
=ED=B5=C4=CA=FD=BE=DD=CE=C4=BC=FE=D0=C5=CF=A2=BC=B0=B9=E9=B5=B5=D6=D8=D7=F6=
=C8=D5=D6=BE=B1=B8=B7=DD=D0=C5=CF=A2=A3=AC=B4=D3=B6=F8=D6=B4=D0=D0=CA=FD=BE=
=DD=BF=E9=BD=E9=D6=CA=BB=D6=B8=B4=A1=A3</BLOCKQUOTE></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">108</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">
      <H2><A name=3De.15.2.2></A>Overview of RMAN and User-Managed =
Restore and=20
      Recovery</H2></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">
      <H2><A name=3Dc.15.2.2></A>15.2.2 RMAN =
=D3=EB=CA=D6=B9=A4=B9=DC=C0=ED=B5=C4=B8=B4=D4=AD=BC=B0=BB=D6=B8=B4=B8=C5=CA=
=F6</H2></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">109</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">You =
have a choice=20
      between two basic methods for recovering physical files. You can:
      <UL>
        <LI style=3D"MARGIN-BOTTOM: 10px">Use the RMAN utility to =
restore and=20
        recover the database=20
        <LI style=3D"MARGIN-BOTTOM: 10px">Restore backups by means of =
operating=20
        system utilities, and then recover by running the SQL*Plus <FONT =

        color=3D#0000ff>RECOVER</FONT> command </LI></UL></TD>
    <TD vAlign=3Dtop align=3Dleft =
width=3D"48%">=D3=C3=BB=A7=D4=DA=BB=D6=B8=B4=A3=A8recover=A3=A9=CE=EF=C0=ED=
=CE=C4=BC=FE=CA=B1=D3=D0=C1=BD=D6=D6=D1=A1=D4=F1=A3=BA
      <UL>
        <LI style=3D"MARGIN-BOTTOM: 10px">=CA=B9=D3=C3 RMAN =
=C0=B4=B8=B4=D4=AD=A3=A8restore=A3=A9=BC=B0=BB=D6=B8=B4=CA=FD=BE=DD=BF=E2=
=20
        <LI style=3D"MARGIN-BOTTOM: =
10px">=CA=B9=D3=C3=B2=D9=D7=F7=CF=B5=CD=B3=B9=A4=BE=DF=B8=B4=D4=AD=B1=B8=B7=
=DD=A3=AC=B2=A2=CA=B9=D3=C3 SQL*Plus =B5=C4 <FONT=20
        color=3D#0000ff>RECOVER</FONT> =
=C3=FC=C1=EE=BD=F8=D0=D0=BB=D6=B8=B4 </LI></UL></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">110</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"48%">Whichever method you=20
      choose, you can recover a database, tablespace, or datafile. =
Before=20
      performing media recovery, you need to determine which datafiles =
to=20
      recover. Often you can use the <SPAN=20
      style=3D"BACKGROUND-COLOR: #ffff00">fixed view</SPAN> <FONT=20
      color=3D#0000ff>V$RECOVER_FILE</FONT>. This view lists all files =
that=20
      require recovery and explains the error that necessitates=20
recovery.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft=20
      =
width=3D"48%">=C9=CF=CA=F6=C1=BD=D6=D6=B7=BD=B7=A8=BE=F9=BF=C9=D2=D4=B6=D4=
=CA=FD=BE=DD=BF=E2=A3=AC=B1=ED=BF=D5=BC=E4=A3=AC=BB=F2=CA=FD=BE=DD=CE=C4=BC=
=FE=A3=A8datafile=A3=A9=BD=F8=D0=D0=BB=D6=B8=B4=A1=A3=D4=DA=BD=F8=D0=D0=BD=
=E9=D6=CA=BB=D6=B8=B4=A3=A8media=20
      =
recovery=A3=A9=D6=AE=C7=B0=A3=AC=D3=C3=BB=A7=D3=A6=CA=D7=CF=C8=C8=B7=B6=A8=
=C4=C4=D0=A9=CA=FD=BE=DD=CE=C4=BC=FE=D0=E8=D2=AA=B1=BB=BB=D6=B8=B4=A1=A3=CF=
=E0=B9=D8=D0=C5=CF=A2=BF=C9=D2=D4=B4=D3=B9=CC=B6=A8=CA=D3=CD=BC=A3=A8fixe=
d view=A3=A9<FONT=20
      color=3D#0000ff>V$RECOVER_FILE</FONT>=20
  =
=D6=D0=BB=F1=B5=C3=A1=A3=B4=CB=CA=D3=CD=BC=BC=C7=C2=BC=C1=CB=CB=F9=D3=D0=D0=
=E8=D2=AA=B1=BB=BB=D6=B8=B4=B5=C4=CE=C4=BC=FE=BC=B0=B5=BC=D6=C2=CE=CA=CC=E2=
=B5=C4=D4=AD=D2=F2=A1=A3<BR>=A1=A1</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">111</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">
      <BLOCKQUOTE><B>See Also:</B><BR><BR><A=20
        =
href=3D"http://download-west.oracle.com/docs/cd/B19306_01/backup.102/b141=
94/toc.htm">Oracle=20
        Database Backup and Recovery Reference</A> for more about using =
<FONT=20
        color=3D#0000ff>V$</FONT> views in a recovery =
scenario</BLOCKQUOTE></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">
      <BLOCKQUOTE><B>=C1=ED=BC=FB=A3=BA</B><BR><BR><A=20
        =
href=3D"http://download-west.oracle.com/docs/cd/B19306_01/backup.102/b141=
94/toc.htm">Oracle=20
        Database Backup and Recovery Reference</A> =
=C1=CB=BD=E2=D4=DA=D6=B4=D0=D0=BB=D6=B8=B4=B2=D9=D7=F7=CA=B1=C8=E7=BA=CE=CA=
=B9=D3=C3 <FONT=20
        color=3D#0000ff>V$</FONT> =CA=D3=CD=BC</BLOCKQUOTE></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">112</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">
      <H3><A name=3De.15.2.2.1></A>RMAN Restore and Recovery</H3></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">
      <H3><A name=3Dc.15.2.2.1></A>15.2.2.1 RMAN =
=B8=B4=D4=AD=BC=B0=BB=D6=B8=B4</H3></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">113</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">The =
basic RMAN=20
      recovery commands are <FONT color=3D#0000ff>RESTORE</FONT> and =
<FONT=20
      color=3D#0000ff>RECOVER</FONT>. Use <FONT =
color=3D#0000ff>RESTORE</FONT> to=20
      restore datafiles from backup sets or from image copies on disk, =
either to=20
      their current location or to a new location. You can also restore =
backup=20
      sets containing archived redo logs, but this is usually =
unnecessary,=20
      because RMAN automatically restores the archived logs that are =
needed for=20
      recovery and deletes them after the recovery is finished. Use the =
RMAN=20
      <FONT color=3D#0000ff>RECOVER</FONT> command to perform media =
recovery and=20
      apply archived logs or incremental backups.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">RMAN =
=BB=D6=B8=B4=D6=D0=D7=EE=BB=F9=B4=A1=B5=C4=C3=FC=C1=EE=CA=C7 <FONT=20
      color=3D#0000ff>RESTORE</FONT> =BA=CD <FONT =
color=3D#0000ff>RECOVER</FONT>=A1=A3<FONT=20
      color=3D#0000ff>RESTORE</FONT> =
=C3=FC=C1=EE=BF=C9=D2=D4=CA=B9=D3=C3=B1=B8=B7=DD=BC=AF=A3=A8backup =
set=A3=A9=BB=F2=BE=B5=CF=F1=B8=B1=B1=BE=A3=A8image=20
      =
copy=A3=A9=BD=AB=CA=FD=BE=DD=CE=C4=BC=FE=B8=B4=D4=AD=A3=A8restore=A3=A9=B5=
=BD=D4=AD=CA=BC=CE=BB=D6=C3=BB=F2=D0=C2=CE=BB=D6=C3=A1=A3=D3=C3=BB=A7=BF=C9=
=D2=D4=B8=B4=D4=AD=B1=B8=B7=DD=BC=AF=D6=D0=B5=C4=B9=E9=B5=B5=D6=D8=D7=F6=C8=
=D5=D6=BE=A3=A8archived redo=20
      =
log=A3=A9=A3=AC=B5=AB=CD=A8=B3=A3=CE=DE=D0=E8=CA=D6=B9=A4=D6=B4=D0=D0=B4=CB=
=C0=E0=B2=D9=D7=F7=A3=AC=D2=F2=CE=AA RMAN =
=C4=DC=B8=F9=BE=DD=BB=D6=B8=B4=A3=A8recovery=A3=A9=B5=C4=D0=E8=D2=AA=D7=D4=
=B6=AF=B5=D8=B8=B4=D4=AD=B9=E9=B5=B5=D6=D8=D7=F6=C8=D5=D6=BE=A3=AC=B2=A2=D4=
=DA=BB=D6=B8=B4=BD=E1=CA=F8=BA=F3=D7=D4=B6=AF=B5=D8=C9=BE=B3=FD=A1=A3RMAN=
=20
      =B5=C4 <FONT color=3D#0000ff>RECOVER =
</FONT>=C3=FC=C1=EE=D3=C3=D3=DA=D6=B4=D0=D0=BD=E9=D6=CA=BB=D6=B8=B4=A3=A8=
media=20
      =
recovery=A3=A9=A3=AC=BD=AB=B9=E9=B5=B5=D6=D8=D7=F6=C8=D5=D6=BE=BB=F2=D4=F6=
=C1=BF=B1=B8=B7=DD=A3=A8incremental =
backup=A3=A9=D3=A6=D3=C3=B5=BD=B8=B4=D4=AD=BA=F3=B5=C4=CA=FD=BE=DD=CE=C4=BC=
=FE=D6=D0=A1=A3<BR>=A1=A1</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">114</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">RMAN =
automates the=20
      procedure for recovering and restoring your backups and =
copies.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">RMAN =
=CA=B9=B8=B4=D4=AD=BC=B0=BB=D6=B8=B4=B9=A4=D7=F7=B8=FC=BC=D3=D7=D4=B6=AF=BB=
=AF=A1=A3<BR>=A1=A1</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">115</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">
      <BLOCKQUOTE><B>See Also:</B><BR><BR><A=20
        =
href=3D"http://download-west.oracle.com/docs/cd/B19306_01/backup.102/b141=
94/toc.htm">Oracle=20
        Database Backup and Recovery Reference</A> for details about how =
to=20
        restore and recover using RMAN</BLOCKQUOTE></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">
      <BLOCKQUOTE><B>=C1=ED=BC=FB=A3=BA</B><BR><BR><A=20
        =
href=3D"http://download-west.oracle.com/docs/cd/B19306_01/backup.102/b141=
94/toc.htm">Oracle=20
        Database Backup and Recovery Reference</A> =
=C1=CB=BD=E2=B9=D8=D3=DA=CA=B9=D3=C3 RMAN=20
      =
=BD=F8=D0=D0=B8=B4=D4=AD=BC=B0=BB=D6=B8=B4=B5=C4=CF=EA=CF=B8=D0=C5=CF=A2<=
/BLOCKQUOTE></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">116</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">
      <H3><A name=3De.15.2.2.2></A>User-Managed Restore and =
Recovery</H3></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">
      <H3><A name=3Dc.15.2.2.2></A>15.2.2.2 =
=CA=D6=B9=A4=B9=DC=C0=ED=B5=C4=B8=B4=D4=AD=BC=B0=BB=D6=B8=B4</H3></TD></T=
R>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">117</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">If you =
do not use=20
      RMAN, then you can restore backups with operating system utilities =
and=20
      then run the SQL*Plus <FONT color=3D#0000ff>RECOVER</FONT> command =
to=20
      recover the database. You should follow these basic steps:
      <OL>
        <LI style=3D"MARGIN-BOTTOM: 10px">After identifying which files =
are=20
        damaged, place the database in the appropriate state for restore =
and=20
        recovery. For example, if some but not all datafiles are =
damaged, then=20
        take the affected tablespaces offline while the database is =
open.=20
        <LI style=3D"MARGIN-BOTTOM: 10px">Restore the files with an =
operating=20
        system utility. If you do not have a backup, it is sometimes =
possible to=20
        perform recovery if you have the necessary redo logs dating from =
the=20
        time when the datafiles were first created and the control file =
contains=20
        the name of the damaged file.=20
        <LI style=3D"MARGIN-BOTTOM: 10px">If you cannot restore a =
datafile to its=20
        original location, then relocate the restored datafile and =
change the=20
        location in the control file.<BR><BR><SPAN=20
        style=3D"BACKGROUND-COLOR: #ffff00">Restore any necessary =
archived redo=20
        log files.</SPAN>=20
        <LI style=3D"MARGIN-BOTTOM: 10px">Use the SQL*Plus <FONT=20
        color=3D#0000ff>RECOVER</FONT> command to recover the datafile =
backups.=20
        </LI></OL></TD>
    <TD vAlign=3Dtop align=3Dleft =
width=3D"48%">=C8=E7=B9=FB=C3=BB=D3=D0=B2=C9=D3=C3=20
      =
RMAN=A3=AC=BF=C9=D2=D4=CA=B9=D3=C3=B2=D9=D7=F7=CF=B5=CD=B3=B9=A4=BE=DF=B8=
=B4=D4=AD=A3=A8restore=A3=A9=B1=B8=B7=DD=B2=A2=CA=B9=D3=C3 SQL*Plus =
=B5=C4 <FONT=20
      color=3D#0000ff>RECOVER</FONT> =
=C3=FC=C1=EE=BB=D6=B8=B4=A3=A8recover=A3=A9=CA=FD=BE=DD=BF=E2=A1=A3=C9=CF=
=CA=F6=B9=FD=B3=CC=B0=FC=BA=AC=D2=D4=CF=C2=BB=F9=B1=BE=B2=BD=D6=E8=A3=BA
      <OL>
        <LI=20
        style=3D"MARGIN-BOTTOM: =
10px">=CA=D7=CF=C8=C8=B7=B6=A8=C4=C4=D0=A9=CE=C4=BC=FE=D0=E8=D2=AA=B1=BB=BB=
=D6=B8=B4=A3=AC=D6=AE=BA=F3=BD=AB=CA=FD=BE=DD=BF=E2=D6=C3=D3=DA=CA=CA=B5=B1=
=B5=C4=D7=B4=CC=AC=A3=AC=D2=D4=B1=E3=BD=F8=D0=D0=B8=B4=D4=AD=BC=B0=BB=D6=B8=
=B4=B2=D9=D7=F7=A1=A3=C0=FD=C8=E7=A3=AC=CA=FD=BE=DD=BF=E2=D6=D0=D6=BB=D3=D0=
=B2=BF=B7=D6=CA=FD=BE=DD=CE=C4=BC=FE=CB=F0=BB=B5=CA=B1=A3=AC=BF=C9=D2=D4=D4=
=DA=B4=F2=BF=AA=A3=A8open=A3=A9=CA=FD=BE=DD=BF=E2=CA=B1=20
        =
=C1=EE=CA=DC=D3=B0=CF=EC=B5=C4=B1=ED=BF=D5=BC=E4=CD=D1=BB=FA=A3=A8offline=
=A3=A9=A1=A3=20
        <LI=20
        style=3D"MARGIN-BOTTOM: =
10px">=CA=B9=D3=C3=B2=D9=D7=F7=CF=B5=CD=B3=B9=A4=BE=DF=B4=D3=B1=B8=B7=DD=D6=
=D0=B8=B4=D4=AD=CA=FD=BE=DD=CE=C4=BC=FE=A1=A3=D4=DA=C3=BB=D3=D0=B1=B8=B7=DD=
=B5=C4=C7=E9=BF=F6=CF=C2=A3=AC=C8=E7=B9=FB=C4=DC=D5=D2=B5=BD=D7=D4=CA=FD=BE=
=DD=CE=C4=BC=FE=B4=B4=BD=A8=C6=F0=B5=C4=CB=F9=D3=D0=D6=D8=D7=F6=C8=D5=D6=BE=
=A3=A8redo=20
        =
log=A3=A9=A3=AC=D2=D4=BC=B0=B0=FC=BA=AC=CA=DC=CB=F0=CA=FD=BE=DD=CE=C4=BC=FE=
=C3=FB=B3=C6=B5=C4=BF=D8=D6=C6=CE=C4=BC=FE=A3=A8control =
file=A3=A9=A3=AC=D2=B2=D3=D0=BF=C9=C4=DC=BB=D6=B8=B4=CA=FD=BE=DD=A1=A3=20
        <LI=20
        style=3D"MARGIN-BOTTOM: =
10px">=C8=E7=B9=FB=CE=DE=B7=A8=BD=AB=CA=FD=BE=DD=CE=C4=BC=FE=B8=B4=D4=AD=B5=
=BD=C6=E4=D4=AD=CA=BC=CE=BB=D6=C3=A3=AC=C4=C7=C3=B4=BF=C9=D2=D4=D4=DA=D0=C2=
=CE=BB=D6=C3=B8=B4=D4=AD=CA=FD=BE=DD=CE=C4=BC=FE=A3=AC=B2=A2=D4=DA=BF=D8=D6=
=C6=CE=C4=BC=FE=D6=D0=D7=F6=B3=F6=CF=E0=D3=A6=B5=C4=D0=DE=B8=C4=A1=A3<BR>=
<BR>=D7=A2=D2=E2=A3=AC=BB=B9=D2=AA=B8=B4=D4=AD=CF=E0=B9=D8=B5=C4=B9=E9=B5=
=B5=D6=D8=D7=F6=C8=D5=D6=BE=A3=A8archived=20
        redo log=A3=A9=CE=C4=BC=FE=A1=A3=20
        <LI style=3D"MARGIN-BOTTOM: 10px">=CA=B9=D3=C3 SQL*Plus =B5=C4 =
<FONT=20
        color=3D#0000ff>RECOVER</FONT> =
=C3=FC=C1=EE=BB=D6=B8=B4=B8=B4=D4=AD=BA=F3=B5=C4=CA=FD=BE=DD=CE=C4=BC=FE=A1=
=A3 </LI></OL></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">118</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">
      <BLOCKQUOTE><B>See Also:</B><BR><BR><A=20
        =
href=3D"http://download-west.oracle.com/docs/cd/B19306_01/backup.102/b141=
91/toc.htm">Oracle=20
        Database Backup and Recovery Advanced User's Guide</A> for =
details about=20
        how to restore and recover with operating system utilities and=20
      SQL*Plus</BLOCKQUOTE></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">
      <BLOCKQUOTE><B>=C1=ED=BC=FB=A3=BA</B><BR><BR><A=20
        =
href=3D"http://download-west.oracle.com/docs/cd/B19306_01/backup.102/b141=
91/toc.htm">Oracle=20
        Database Backup and Recovery Advanced User's Guide</A> =
=C1=CB=BD=E2=C8=E7=BA=CE=CA=B9=D3=C3=B2=D9=D7=F7=CF=B5=CD=B3=B9=A4=BE=DF=BC=
=B0=20
        SQL*Plus =
=BD=F8=D0=D0=B8=B4=D4=AD=BC=B0=BB=D6=B8=B4</BLOCKQUOTE></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">119</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">
      <H2><A name=3De.15.2.3></A>Recovery Using Oracle Flashback=20
Technology</H2></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">
      <H2><A name=3Dc.15.2.3></A>15.2.3 =C0=FB=D3=C3 Oracle Flashback =
=BC=BC=CA=F5=CA=B5=CF=D6=BB=D6=B8=B4</H2></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">120</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">To =
correct problems=20
      caused by logical data corruptions or user errors, you can use =
Oracle=20
      <SPAN style=3D"BACKGROUND-COLOR: #ffff00">Flashback</SPAN>. =
Flashback=20
      Database and Flashback Table let you quickly recover to a previous =

      time.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft =
width=3D"48%">=D3=C3=BB=A7=D0=E8=D2=AA=D0=DE=D5=FD=C2=DF=BC=AD=CA=FD=BE=DD=
=B4=ED=CE=F3=A3=A8logical data=20
      =
corruption=A3=A9=BB=F2=D3=C3=BB=A7=B2=D9=D7=F7=CA=A7=CE=F3=A3=A8user =
error=A3=A9=CA=B1=BF=C9=D2=D4=CA=B9=D3=C3 Oracle =
Flashback=A3=A8=BB=D8=C9=C1=A3=A9=B9=A6=C4=DC=A1=A3</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">121</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">This =
section=20
      contains the following topics:
      <UL>
        <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
        =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#e.15.2.3.1"=20
        target=3D_self>Overview of Oracle Flashback Database</A>=20
        <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
        =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#e.15.2.3.2"=20
        target=3D_self>Overview of Oracle Flashback Table</A> =
</LI></UL></TD>
    <TD vAlign=3Dtop align=3Dleft =
width=3D"48%">=B1=BE=BD=DA=B0=FC=BA=AC=D2=D4=CF=C2=D6=F7=CC=E2=A3=BA
      <UL>
        <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
        =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#c.15.2.3.1"=20
        target=3D_self>Oracle Flashback Database =B8=C5=CA=F6</A>=20
        <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
        =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#c.15.2.3.2"=20
        target=3D_self>Oracle Flashback Table =B8=C5=CA=F6</A> =
</LI></UL></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">122</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">
      <BLOCKQUOTE><B>See Also:</B><BR><BR>"<A=20
        =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/a">Overview=20
        of Oracle Flashback Features</A>" for an overview of all Oracle=20
        Flashback features</BLOCKQUOTE></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">
      <BLOCKQUOTE><B>=C1=ED=BC=FB=A3=BA</B><BR><BR>=A1=B0<A=20
        =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/a">Oracle=20
        Flashback =
=CC=D8=D0=D4=B8=C5=CA=F6</A>=A1=B1=C1=CB=BD=E2=B9=D8=D3=DA Oracle =
Flashback =CC=D8=D0=D4=B5=C4=BD=E9=C9=DC</BLOCKQUOTE></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">123</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">
      <H3><A name=3De.15.2.3.1></A>Overview of Oracle Flashback =
Database</H3></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">
      <H3><A name=3Dc.15.2.3.1></A>15.2.3.1 Oracle Flashback Database=20
=B8=C5=CA=F6</H3></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">124</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%"><SPAN=20
      style=3D"BACKGROUND-COLOR: #ffff00">Oracle Flashback =
Database</SPAN> lets=20
      you quickly recover an Oracle database to a previous time to =
correct=20
      problems caused by logical data corruptions or user =
errors.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">Oracle Flashback=20
      =
Database=A3=A8=CA=FD=BE=DD=BF=E2=BB=D8=C9=C1=A3=A9=BC=BC=CA=F5=CA=B9=D3=C3=
=BB=A7=C4=DC=B9=BB=D1=B8=CB=D9=B5=D8=BD=AB=CA=FD=BE=DD=BF=E2=BB=D6=B8=B4=B5=
=BD=D6=AE=C7=B0=B5=C4=C4=B3=B8=F6=CA=B1=BC=E4=B5=E3=A3=AC=B4=D3=B6=F8=D0=DE=
=D5=FD=C2=DF=BC=AD=CA=FD=BE=DD=B4=ED=CE=F3=A3=A8logical data=20
      =
corruption=A3=A9=BB=F2=D3=C3=BB=A7=B2=D9=D7=F7=CA=A7=CE=F3=A3=A8user =
error=A3=A9=A1=A3<BR>=A1=A1</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">125</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">If an =
Oracle managed=20
      disk area, called a <SPAN style=3D"BACKGROUND-COLOR: =
#ffff00">flash recovery=20
      area</SPAN> is configured, and if you have enabled the Flashback=20
      functionality, then you can use the RMAN and SQL <FONT=20
      color=3D#0000ff>FLASHBACK DATABASE</FONT> commands to return the =
database to=20
      a prior time. Flashback Database is not true media recovery, =
because it=20
      does not involve restoring physical files. However, Flashback is=20
      preferable to using the <FONT color=3D#0000ff>RESTORE</FONT> and =
<FONT=20
      color=3D#0000ff>RECOVER</FONT> commands in some cases, because it =
is faster=20
      and easier, and does not require restoring the whole =
database.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft =
width=3D"48%">=D3=C3=BB=A7=BF=C9=D2=D4=C5=E4=D6=C3=D2=BB=B8=F6=D3=C9 =
Oracle =
=B9=DC=C0=ED=B5=C4=B4=C5=C5=CC=C7=F8=D3=F2=A3=A8=B4=CB=C7=F8=D3=F2=B1=BB=B3=
=C6=CE=AAFlash=20
      Recovery =
Area=A3=A8=BB=D8=C9=C1=BB=D6=B8=B4=C7=F8=A3=A9=A3=A9=A3=AC=B2=A2=BF=AA=C6=
=F4=CA=FD=BE=DD=BF=E2=B5=C4 =
Flashback=A3=A8=BB=D8=C9=C1=A3=A9=B9=A6=C4=DC=A3=AC=B4=CB=CA=B1=BE=CD=BF=C9=
=D2=D4=CD=A8=B9=FD RMAN =BB=F2 <FONT=20
      color=3D#0000ff>FLASHBACK DATABASE</FONT> =
=C3=FC=C1=EE=BD=AB=CA=FD=BE=DD=BF=E2=BB=D6=B8=B4=B5=BD=D6=AE=C7=B0=B5=C4=C4=
=B3=B8=F6=CA=B1=BC=E4=B5=E3=A1=A3Flashback=20
      Database =
=B2=A2=B2=BB=CA=C7=D5=E6=D5=FD=B5=C4=BD=E9=D6=CA=BB=D6=B8=B4=A3=A8media =
recovery=A3=A9=A3=AC=D2=F2=CE=AA=D4=DA=B4=CB=B9=FD=B3=CC=D6=D0=B2=A2=C3=BB=
=D3=D0=B8=B4=D4=AD=A3=A8restore=A3=A9=CE=EF=C0=ED=CA=FD=BE=DD=CE=C4=BC=FE=
=A1=A3=B5=AB=CA=C7=A3=AC=D4=DA=C4=B3=D0=A9=C7=E9=BF=F6=CF=C2=20
      Flashback Database =B1=C8 <FONT color=3D#0000ff>RESTORE</FONT> =
=D3=EB <FONT=20
      color=3D#0000ff>RECOVER</FONT>=20
=C3=FC=C1=EE=B8=FC=CA=CA=D3=C3=A3=AC=D2=F2=CE=AA=C7=B0=D5=DF=B8=FC=BC=D3=D1=
=B8=CB=D9=B8=FC=BC=D3=BC=F2=B5=A5=A3=AC=C7=D2=CE=DE=D0=EB=B6=D4=D5=FB=B8=F6=
=CA=FD=BE=DD=BF=E2=BD=F8=D0=D0=B8=B4=D4=AD=B2=D9=D7=F7=A1=A3<BR>=A1=A1</T=
D></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">126</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">
      <BLOCKQUOTE><B>See Also:</B><BR><BR>"<A=20
        =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#e.15.4"=20
        target=3D_self>Flash Recovery Area</A>"</BLOCKQUOTE></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">
      <BLOCKQUOTE><B>=C1=ED=BC=FB</B><BR><BR>=A1=B0<A=20
        =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#c.15.4"=20
        target=3D_self>Flash Recovery =
Area</A>=A1=B1</BLOCKQUOTE></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">127</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">To =
Flashback a=20
      database, Oracle uses past block images to back out changes to the =

      database. During normal database operation, Oracle occasionally =
logs these=20
      block images in <SPAN style=3D"BACKGROUND-COLOR: =
#ffff00">Flashback=20
      log</SPAN>s. Flashback logs are written sequentially, and they are =
not=20
      archived. Oracle automatically creates, deletes, and resizes =
Flashback=20
      logs in the flash recovery area. You only need to be aware of =
Flashback=20
      logs for monitoring performance and deciding how much disk space =
to=20
      allocate to the flash recovery area for Flashback =
logs.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft =
width=3D"48%">=D4=DA=B6=D4=CA=FD=BE=DD=BF=E2=BD=F8=D0=D0 =
Flashback=A3=A8=BB=D8=C9=C1=A3=A9=CA=B1=A3=ACOracle=20
      =
=CA=B9=D3=C3=CA=FD=BE=DD=BF=E9=D4=DA=B9=FD=C8=A5=CA=B1=BC=E4=B5=C4=BE=B5=CF=
=F1=C0=B4=B3=B7=CF=FA=B6=D4=CA=FD=BE=DD=BF=E2=B5=C4=D0=DE=B8=C4=A1=A3=D4=DA=
=CA=FD=BE=DD=BF=E2=D5=FD=B3=A3=B2=D9=D7=F7=C6=DA=BC=E4=A3=ACOralce =
=B2=BB=B6=A8=C6=DA=B5=D8=BD=AB=B1=BB=D0=DE=B8=C4=B5=C4=CA=FD=BE=DD=BF=E9=B5=
=C4=BE=B5=CF=F1=BC=C7=C2=BC=D4=DA Flashback=20
      log=A3=A8=BB=D8=C9=C1=C8=D5=D6=BE=A3=A9=D6=D0=A1=A3Flashback log =
=B5=C4=D0=B4=C8=EB=CA=C7=CB=B3=D0=F2=B5=C4=A3=AC=C7=D2=B2=BB=BB=E1=B1=BB=B9=
=E9=B5=B5=A1=A3Oracle =C4=DC=D7=D4=B6=AF=B5=D8=D4=DA Flash Recovery Area =

      =D6=D0=B4=B4=BD=A8=A3=AC=C9=BE=B3=FD Flashback =
log=A3=AC=B2=A2=D7=D4=B6=AF=B5=D8=B5=F7=D5=FB=C6=E4=C8=DD=C1=BF=A1=A3=B6=F8=
=D3=C3=BB=A7=D6=BB=D0=E8=B9=D8=D7=A2 Flashback log =
=B5=C4=D0=D4=C4=DC=A3=AC=D2=D4=BC=B0=CE=AA Flash=20
      Recovery Area =
=B7=D6=C5=E4=B6=E0=C9=D9=B4=C5=C5=CC=BF=D5=BC=E4=D2=D4=B4=E6=B4=A2 =
Flashback log=A1=A3<BR>=A1=A1</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">128</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">The =
amount of time=20
      it takes to Flashback a database is proportional to how far back =
you need=20
      to revert the database, rather than the time it would take to =
restore and=20
      recover the whole database, which could be much longer. <SPAN=20
      style=3D"BACKGROUND-COLOR: #ffff00">The before images in the =
Flashback logs=20
      are only used to restore the database to a point in the past, and =
forward=20
      recovery is used to bring the database to a consistent state at =
some time=20
      in the past.</SPAN> Oracle returns datafiles to the previous=20
      point-in-time, but not auxiliary files, such as initialization =
parameter=20
      files.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft =
width=3D"48%">=B6=D4=CA=FD=BE=DD=BF=E2=BD=F8=D0=D0 Flashback=20
      =
=CB=F9=D0=E8=B5=C4=CA=B1=BC=E4=D3=EB=B6=D4=CA=FD=BE=DD=BF=E2=BD=F8=D0=D0=BB=
=D8=CB=DD=B5=C4=CA=B1=B3=A4=CA=C7=B3=C9=B1=C8=C0=FD=B5=C4=A3=AC=B6=F8=B6=D4=
=D5=FB=B8=F6=CA=FD=BE=DD=BF=E2=BD=F8=D0=D0=B8=B4=D4=AD=D3=EB=BB=D6=B8=B4=A3=
=A8recover=A3=A9=CB=F9=D0=E8=B5=C4=CA=B1=BC=E4=CD=A8=B3=A3=D2=AA=B8=FC=B3=
=A4=A1=A3Flashback log=20
      =
=D6=D0=B5=C4=CA=FD=BE=DD=BF=E9=BE=B5=CF=F1=B5=C4=D7=F7=D3=C3=CA=C7=BD=AB=CA=
=FD=BE=DD=BF=E2=BB=B9=D4=AD=B5=BD=B9=FD=C8=A5=B5=C4=C4=B3=B8=F6=CA=B1=BC=E4=
=B5=E3=A3=AC=B6=F8=BB=D6=B8=B4=A3=A8recovery=A3=A9=B2=D9=D7=F7=CA=C7=CF=F2=
=C7=B0=B5=C4=A3=AC=CB=FD=C4=DC=C8=B7=B1=A3=CA=FD=BE=DD=BF=E2=B8=B4=D4=AD=B5=
=BD=B9=FD=C8=A5=B5=C4=C4=B3=B8=F6=CA=B1=BC=E4=B5=E3=BA=F3=A3=AC=D2=C0=C8=BB=
=B1=A3=B3=D6=D2=BB=D6=C2=D0=D4=B5=C4=D7=B4=CC=AC=A1=A3Oracle=20
      =
=D6=BB=C4=DC=BD=AB=CA=FD=BE=DD=CE=C4=BC=FE=BB=B9=D4=AD=B5=BD=B9=FD=C8=A5=B5=
=C4=C4=B3=D2=BB=CA=B1=BC=E4=B5=E3=A3=AC=B6=F8=B2=BB=C4=DC=BB=B9=D4=AD=C6=E4=
=CB=FB=CE=C4=BC=FE=A3=A8=C0=FD=C8=E7=B3=F5=CA=BC=BB=AF=B2=CE=CA=FD=CE=C4=BC=
=FE=A3=A8initialization parameter=20
      file=A3=A9=A3=A9=A1=A3<BR>=A1=A1</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">129</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">
      <BLOCKQUOTE>
        <P><B>See Also:</B></P>
        <UL>
          <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
          =
href=3D"http://download-west.oracle.com/docs/cd/B19306_01/backup.102/b141=
91/toc.htm">Oracle=20
          Database Backup and Recovery Advanced User's Guide</A> for =
details=20
          about using Oracle Flashback Database=20
          <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
          =
href=3D"http://download-west.oracle.com/docs/cd/B19306_01/server.102/b142=
00/toc.htm">Oracle=20
          Database SQL Reference</A> for information about the <FONT=20
          color=3D#0000ff>FLASHBACK DATABASE</FONT> statement=20
    </LI></UL></BLOCKQUOTE></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">
      <BLOCKQUOTE>
        <P><B>=C1=ED=BC=FB=A3=BA</B></P>
        <UL>
          <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
          =
href=3D"http://download-west.oracle.com/docs/cd/B19306_01/backup.102/b141=
91/toc.htm">Oracle=20
          Database Backup and Recovery Advanced User's Guide</A> =
=C1=CB=BD=E2=B9=D8=D3=DA=CA=B9=D3=C3 Oracle=20
          Flashback Database =B5=C4=CF=EA=CF=B8=D0=C5=CF=A2=20
          <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
          =
href=3D"http://download-west.oracle.com/docs/cd/B19306_01/server.102/b142=
00/toc.htm">Oracle=20
          Database SQL Reference</A> =C1=CB=BD=E2=B9=D8=D3=DA <FONT =
color=3D#0000ff>FLASHBACK=20
          DATABASE</FONT> =D3=EF=BE=E4=B5=C4=D0=C5=CF=A2 =
</LI></UL></BLOCKQUOTE></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">130</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">
      <H3><A name=3De.15.2.3.2></A>Overview of Oracle Flashback =
Table</H3></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">
      <H3><A name=3Dc.15.2.3.2></A>15.2.3.2 Oracle Flashback Table =
=B8=C5=CA=F6</H3></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">131</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%"><SPAN=20
      style=3D"BACKGROUND-COLOR: #ffff00">Oracle Flashback Table</SPAN> =
lets you=20
      recover tables to a specified point in time with a single =
statement. You=20
      can restore table data along with associated indexes, triggers, =
and=20
      constraints, while the database is online, undoing changes to only =
the=20
      specified tables. <SPAN style=3D"BACKGROUND-COLOR: =
#ffff00">Flashback Table=20
      does not address physical corruption; for example, bad disks or =
data=20
      segment and index inconsistencies.</SPAN><BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">Oracle Flashback=20
      =
Table=A3=A8=B1=ED=BB=D8=C9=C1=A3=A9=BC=BC=CA=F5=CA=B9=D3=C3=BB=A7=C4=DC=B9=
=BB=CD=A8=B9=FD=D2=BB=B8=F6 SQL=20
      =
=D3=EF=BE=E4=BD=AB=B1=ED=BB=D6=B8=B4=B5=BD=C4=B3=D2=BB=CC=D8=B6=A8=B5=C4=CA=
=B1=BC=E4=B5=E3=A1=A3=D3=C3=BB=A7=C4=DC=B9=BB=D4=DA=CA=FD=BE=DD=BF=E2=B4=A6=
=D3=DA=C1=AA=BB=FA=D7=B4=CC=AC=CA=B1=BB=D6=B8=B4=CC=D8=B6=A8=B1=ED=B5=C4=CA=
=FD=BE=DD=A3=AC=B2=A2=CD=AC=CA=B1=BB=D6=B8=B4=CF=E0=B9=D8=B5=C4=CB=F7=D2=FD=
=A3=AC=B4=A5=B7=A2=C6=F7=A3=AC=BC=B0=D4=BC=CA=F8=A1=A3Flashback Table=20
      =
=CE=DE=B7=A8=BD=E2=BE=F6=CE=EF=C0=ED=B9=CA=D5=CF=A1=A3=C0=FD=C8=E7=A3=AC=B4=
=C5=C5=CC=B9=CA=D5=CF=BB=F2=CA=FD=BE=DD=B6=CE=BC=B0=CB=F7=D2=FD=B7=C7=D2=BB=
=D6=C2=D0=D4=CE=CA=CC=E2=A1=A3<BR>=A1=A1</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">132</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"48%">Flashback Table=20
      works like a self-service repair tool. Suppose a user accidentally =
deletes=20
      some important rows from a table and wants to recover the deleted =
rows.=20
      You can restore the table to the time before the deletion and see =
the=20
      missing rows in the table with the <FONT color=3D#0000ff>FLASHBACK =

      TABLE</FONT> statement.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">Flashback Table=20
      =
=CF=F1=D2=BB=B8=F6=D7=D4=D6=FA=CA=BD=B5=C4=CA=FD=BE=DD=D0=DE=B8=B4=B9=A4=BE=
=DF=A1=A3=BC=D9=C9=E8=D3=C3=BB=A7=D2=E2=CD=E2=C9=BE=B3=FD=C1=CB=B1=ED=C4=DA=
=B5=C4=B2=BF=B7=D6=CA=FD=BE=DD=A3=AC=D0=E8=D2=AA=BD=F8=D0=D0=BB=D6=B8=B4=A1=
=A3=D3=C3=BB=A7=BF=C9=D2=D4=CA=B9=D3=C3 <FONT color=3D#0000ff>FLASHBACK=20
      TABLE</FONT> =
=D3=EF=BE=E4=BD=AB=B1=ED=BB=B9=D4=AD=B5=BD=C9=BE=B3=FD=B7=A2=C9=FA=D6=AE=C7=
=B0=B5=C4=C4=B3=B8=F6=CA=B1=BC=E4=B5=E3=A3=AC=B4=D3=B6=F8=BB=D6=B8=B4=CE=F3=
=C9=BE=B3=FD=B5=C4=CA=FD=BE=DD=A1=A3<BR>=A1=A1</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">133</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">You =
can revert the=20
      table and its contents to a certain wall clock time or =
user-specified=20
      system change number (SCN). Use Flashback Table with Oracle <SPAN=20
      style=3D"BACKGROUND-COLOR: #ffff00">Flashback Version query</SPAN> =
and <SPAN=20
      style=3D"BACKGROUND-COLOR: #ffff00">Flashback Transaction =
Query</SPAN> to=20
      find a time to which the table should be restored back =
to.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft =
width=3D"48%">=D3=C3=BB=A7=BF=C9=D2=D4=BD=AB=CA=FD=BE=DD=BB=D6=B8=B4=B5=BD=
=C4=B3=B8=F6=CA=B1=BC=E4=BB=F2=C4=B3=B8=F6=CC=D8=B6=A8=B5=C4=CF=B5=CD=B3=B1=
=E4=BB=AF=BA=C5=A3=A8system=20
      change =
number=A3=ACSCN=A3=A9=A1=A3=D3=C3=BB=A7=BF=C9=D2=D4=CD=A8=B9=FD =
Flashback Version =
Query=A3=A8=BB=D8=C9=C1=B0=E6=B1=BE=B2=E9=D1=AF=A3=A9=BB=F2 Flashback=20
      Transaction =
Query=A3=A8=BB=D8=C9=C1=CA=C2=CE=F1=B2=E9=D1=AF=A3=A9=C0=B4=C8=B7=B6=A8=B1=
=ED=BB=D6=B8=B4=B5=C4=D7=BC=C8=B7=CA=B1=BC=E4=B5=E3=A1=A3<BR>=A1=A1</TD><=
/TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">134</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">
      <BLOCKQUOTE>
        <P><B>See Also:</B></P>
        <UL>
          <LI style=3D"MARGIN-BOTTOM: 10px">"<A=20
          =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/13.Data%20Concurrency%20and%20Consistency.htm#e.13.4">Overvi=
ew=20
          of Oracle Flashback Query</A>" for information about Oracle =
Flashback=20
          Query=20
          <LI style=3D"MARGIN-BOTTOM: 10px">"<A=20
          =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#e.15.2.3.1"=20
          target=3D_self>Overview of Oracle Flashback Database</A>" for=20
          information about reverting an entire database to an earlier =
point in=20
          time </LI></UL></BLOCKQUOTE></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">
      <BLOCKQUOTE>
        <P><B>=C1=ED=BC=FB=A3=BA</B></P>
        <UL>
          <LI style=3D"MARGIN-BOTTOM: 10px">=A1=B0<A=20
          =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/13.Data%20Concurrency%20and%20Consistency.htm#c.13.4">Oracle=
=20
          Flashback Query =B8=C5=CA=F6</A>=A1=B1=C1=CB=BD=E2=B9=D8=D3=DA =
Oracle Flashback Query =B5=C4=D0=C5=CF=A2=20
          <LI style=3D"MARGIN-BOTTOM: 10px">=A1=B0<A=20
          =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#c.15.2.3.1"=20
          target=3D_self>Oracle Flashback Database =
=B8=C5=CA=F6</A>=A1=B1=C1=CB=BD=E2=C8=E7=BA=CE=BD=AB=D5=FB=B8=F6=CA=FD=BE=
=DD=BF=E2=BB=D6=B8=B4=B5=BD=D6=AE=C7=B0=B5=C4=C4=B3=B8=F6=CA=B1=BC=E4=B5=E3=
=20
          </LI></UL></BLOCKQUOTE></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">135</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">For =
Flashback Table=20
      to succeed, the system must retain enough undo information to =
satisfy the=20
      specified SCN or timestamp, and the integrity constraints =
specified on the=20
      tables cannot be violated. Also, <SPAN=20
      style=3D"BACKGROUND-COLOR: #ffff00">row movement</SPAN> must be=20
    enabled.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">=CE=AA=C1=CB=B1=A3=D6=A4 =
Flashback Table=20
      =
=D5=FD=B3=A3=B9=A4=D7=F7=A3=AC=CA=D7=CF=C8=A3=AC=CF=B5=CD=B3=C4=DA=B1=A3=B4=
=E6=B5=C4=BB=B9=D4=AD=D0=C5=CF=A2=A3=A8undo =
information=A3=A9=B1=D8=D0=EB=C2=FA=D7=E3=D3=C3=BB=A7=D6=B8=B6=A8=B5=C4 =
SCN=20
      =
=BB=F2=CA=B1=BC=E4=B4=C1=A3=A8timestamp=A3=A9=B5=C4=D0=E8=C7=F3=A3=BB=C6=E4=
=B4=CE=A3=AC=BB=B9=D4=AD=B5=C4=CA=FD=BE=DD=B2=BB=C4=DC=CE=A5=B1=B3=B1=ED=C9=
=CF=B5=C4=CD=EA=D5=FB=D0=D4=D4=BC=CA=F8=A3=A8integrity=20
      =
constraint=A3=A9=A3=BB=D7=EE=BA=F3=A3=AC=B1=BB=BB=B9=D4=AD=B5=C4=B1=ED=D3=
=A6=D4=CA=D0=ED=D0=D0=D2=C6=B6=AF=A3=A8row =
movement=A3=A9=A1=A3<BR>=A1=A1</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">136</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">The =
point of time in=20
      the past that you use Flashback Table to go to is controlled by =
the undo=20
      retention of the system. Oracle Database 10g automatically tunes a =

      parameter called the undo retention period. The undo retention =
period=20
      indicates the amount of time that must pass before old undo=20
      information=A1=AAthat is, undo information for committed =
transactions=A1=AAcan be=20
      overwritten. The database collects usage statistics and tunes the =
undo=20
      retention period based on these statistics and on undo tablespace=20
      size.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">=D3=C3=BB=A7=CA=B9=D3=C3 =
Flashback Table=20
      =
=C4=DC=B9=BB=BD=AB=CA=FD=BE=DD=BF=E2=BB=B9=D4=AD=B5=BD=B6=E0=BE=C3=D6=AE=C7=
=B0=C8=A1=BE=F6=D3=DA=CF=B5=CD=B3=B5=C4=BB=B9=D4=AD=D0=C5=CF=A2=B1=A3=C1=F4=
=D6=DC=C6=DA=A3=A8undo retention=A3=A9=A1=A3Oracle=20
      =
=CA=FD=BE=DD=BF=E2=C4=DC=B9=BB=D7=D4=B6=AF=B5=D8=B5=F7=D5=FB=BB=B9=D4=AD=D0=
=C5=CF=A2=B1=A3=C1=F4=D6=DC=C6=DA=B2=CE=CA=FD=A1=A3=D5=E2=B8=F6=B2=CE=CA=FD=
=B5=C4=BA=AC=D2=E5=CA=C7=BE=C9=B5=C4=BB=B9=D4=AD=D0=C5=CF=A2=A3=A8=D2=D1=CC=
=E1=BD=BB=CA=C2=CE=F1=B5=C4=BB=B9=D4=AD=D0=C5=CF=A2=A3=A9=B1=D8=D0=EB=B1=A3=
=C1=F4=B6=E0=B3=A4=CA=B1=BC=E4=B2=C5=C4=DC=B1=BB=B8=B2=B8=C7=A1=A3=CA=FD=BE=
=DD=BF=E2=C4=DC=B9=BB=CA=D5=BC=AF=CF=B5=CD=B3=D4=CB=D0=D0=D0=C5=CF=A2=A3=AC=
=B2=A2=B8=F9=BE=DD=D5=E2=D0=A9=D0=C5=CF=A2=BC=B0=BB=B9=D4=AD=B1=ED=BF=D5=BC=
=E4=A3=A8undo=20
      =
tablespace=A3=A9=B5=C4=C8=DD=C1=BF=B5=F7=D5=FB=BB=B9=D4=AD=D0=C5=CF=A2=B1=
=A3=C1=F4=D6=DC=C6=DA=B2=CE=CA=FD=A1=A3<BR>=A1=A1</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">137</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">
      <BLOCKQUOTE><B>Note:</B><BR><BR>Oracle strongly recommends that =
you run=20
        your database in automatic undo management mode. In addition, =
set the=20
        undo retention to an interval large enough to include the oldest =
data=20
        you anticipate needing.</BLOCKQUOTE></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">
      <BLOCKQUOTE><B>=CC=E1=CA=BE=A3=BA</B><BR><BR>Oracle =
=C7=BF=C1=D2=BD=A8=D2=E9=D3=C3=BB=A7=BD=AB=CA=FD=BE=DD=BF=E2=D4=CB=D0=D0=D4=
=DA=D7=D4=B6=AF=BB=B9=D4=AD=B9=DC=C0=ED=C4=A3=CA=BD=A3=A8automatic=20
        undo management=20
    =
mode=A3=A9=CF=C2=A1=A3=B4=CB=CD=E2=A3=AC=D3=A6=CA=B9=BB=B9=D4=AD=D0=C5=CF=
=A2=B1=A3=C1=F4=D6=DC=C6=DA=B2=CE=CA=FD=D7=E3=B9=BB=B4=F3=A3=AC=D2=D4=B1=E3=
=B1=A3=B4=E6=C4=DC=B9=BB=C2=FA=D7=E3=BB=D6=B8=B4=D0=E8=D2=AA=B5=C4=BB=B9=D4=
=AD=D0=C5=CF=A2=A1=A3</BLOCKQUOTE></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">138</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">
      <BLOCKQUOTE>
        <P><B>See Also:</B></P>
        <UL>
          <LI style=3D"MARGIN-BOTTOM: 10px">"<A=20
          =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/02.Data%20Blocks,%20Extents,%20and%20Segments.htm#e.2.4.4.3"=
>Automatic=20
          Undo Retention</A>"=20
          <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
          =
href=3D"http://download-west.oracle.com/docs/cd/B19306_01/backup.102/b141=
91/toc.htm">Oracle=20
          Database Backup and Recovery Advanced User's Guide</A> for =
details=20
          about using Oracle Flashback Table=20
          <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
          =
href=3D"http://download-west.oracle.com/docs/cd/B19306_01/server.102/b142=
00/toc.htm">Oracle=20
          Database SQL Reference</A> for information on the <FONT=20
          color=3D#0000ff>UNDO_MANAGEMENT</FONT> and <FONT=20
          color=3D#0000ff>UNDO_RETENTION</FONT> initialization =
parameters and=20
          information about the <FONT color=3D#0000ff>FLASHBACK =
TABLE</FONT>=20
          statement=20
          <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
          =
href=3D"http://download-west.oracle.com/docs/cd/B19306_01/server.102/b142=
31/toc.htm">Oracle=20
          Database Administrator's Guide</A> for more information about =
the=20
          automatic tuning of undo retention =
</LI></UL></BLOCKQUOTE></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">
      <BLOCKQUOTE>
        <P><B>=C1=ED=BC=FB=A3=BA</B></P>
        <UL>
          <LI style=3D"MARGIN-BOTTOM: 10px">=A1=B0<A=20
          =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/02.Data%20Blocks,%20Extents,%20and%20Segments.htm#c.2.4.4.3"=
>=D7=D4=B6=AF=BB=B9=D4=AD=D0=C5=CF=A2=B1=A3=B4=E6=D6=DC=C6=DA=B9=DC=C0=ED=
</A>=A1=B1=20

          <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
          =
href=3D"http://download-west.oracle.com/docs/cd/B19306_01/backup.102/b141=
91/toc.htm">Oracle=20
          Database Backup and Recovery Advanced User's Guide</A> =
=C1=CB=BD=E2=B9=D8=D3=DA Oracle=20
          Flashback Table =B5=C4=CF=EA=CF=B8=D0=C5=CF=A2=20
          <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
          =
href=3D"http://download-west.oracle.com/docs/cd/B19306_01/server.102/b142=
00/toc.htm">Oracle=20
          Database SQL Reference</A> =C1=CB=BD=E2=B9=D8=D3=DA <FONT=20
          color=3D#0000ff>UNDO_MANAGEMENT</FONT> =BC=B0 <FONT=20
          color=3D#0000ff>UNDO_RETENTION</FONT> =
=B2=CE=CA=FD=B5=C4=D0=C5=CF=A2=A3=AC=D2=D4=BC=B0=C8=E7=BA=CE=CA=B9=D3=C3 =
<FONT=20
          color=3D#0000ff>FLASHBACK TABLE</FONT> =D3=EF=BE=E4=20
          <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
          =
href=3D"http://download-west.oracle.com/docs/cd/B19306_01/server.102/b142=
31/toc.htm">Oracle=20
          Database Administrator's Guide</A> =
=C1=CB=BD=E2=B9=D8=D3=DA=BB=B9=D4=AD=D0=C5=CF=A2=B1=A3=B4=E6=D6=DC=C6=DA=D7=
=D4=B6=AF=B5=F7=D5=FB=B5=C4=D0=C5=CF=A2=20
      </LI></UL></BLOCKQUOTE></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">139</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">
      <H2><A name=3De.15.2.4></A>Other Types of Oracle =
Recovery</H2></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">
      <H2><A name=3Dc.15.2.4></A>15.2.4 =C6=E4=CB=FB=C0=E0=D0=CD=B5=C4 =
Oracle =BB=D6=B8=B4</H2></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">140</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">This =
section=20
      contains the following topics:
      <UL>
        <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
        =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#e.15.2.4.1"=20
        target=3D_self>Overview of Redo Application</A>=20
        <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
        =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#e.15.2.4.2"=20
        target=3D_self>Overview of Instance and Crash Recovery</A> =
</LI></UL></TD>
    <TD vAlign=3Dtop align=3Dleft =
width=3D"48%">=B1=BE=BD=DA=B0=FC=BA=AC=D2=D4=CF=C2=D6=F7=CC=E2=A3=BA
      <UL>
        <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
        =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#c.15.2.4.1"=20
        target=3D_self>=D6=D8=D7=F6=D6=B4=D0=D0=B8=C5=CA=F6</A>=20
        <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
        =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#c.15.2.4.2"=20
        =
target=3D_self>=CA=B5=C0=FD=BB=D6=B8=B4=BC=B0=B1=C0=C0=A3=BB=D6=B8=B4=B8=C5=
=CA=F6</A> </LI></UL></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">141</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">
      <H3><A name=3De.15.2.4.1></A>Overview of Redo =
Application</H3></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">
      <H3><A name=3Dc.15.2.4.1></A>15.2.4.1 =
=D6=D8=D7=F6=D6=B4=D0=D0=B8=C5=CA=F6</H3></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">142</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"48%">Database buffers in=20
      the buffer cache in the SGA are written to disk only when =
necessary, using=20
      a least-recently-used (LRU) algorithm. Because of the way that the =

      database writer process uses this algorithm to write database =
buffers to=20
      datafiles, datafiles could contain some data blocks modified by=20
      uncommitted transactions and some data blocks missing changes from =

      committed transactions.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">Oracle=20
      =
=D6=BB=D4=DA=B1=D8=D2=AA=CA=B1=D2=C0=BE=DD=D7=EE=BD=FC=D7=EE=C9=D9=CA=B9=D3=
=C3=A3=A8least-recently-used=A3=ACLRU=A3=A9=CB=E3=B7=A8=BD=AB SGA =
=CA=FD=BE=DD=BF=E2=BB=BA=B4=E6=A3=A8buffer=20
      =
cache=A3=A9=C4=DA=B5=C4=BB=BA=B3=E5=CA=FD=BE=DD=D0=B4=C8=EB=B4=C5=C5=CC=A1=
=A3=D3=C9=D3=DA=CA=FD=BE=DD=BF=E2=D0=B4=BD=F8=B3=CC=A3=A8database writer =
process=A3=A9=BD=AB=CA=FD=BE=DD=BB=BA=B3=E5=C7=F8=A3=A8database=20
      =
buffer=A3=A9=D0=B4=C8=EB=CA=FD=BE=DD=CE=C4=BC=FE=CA=B1=D7=F1=D5=D5=C9=CF=CA=
=F6=B9=E6=D4=F2=A3=AC=B1=BB=CE=B4=CC=E1=BD=BB=CA=C2=CE=F1=D0=DE=B8=C4=B9=FD=
=B5=C4=CA=FD=BE=DD=BF=E9=D2=B2=D3=D0=BF=C9=C4=DC=BB=E1=B1=BB=D0=B4=C8=EB=CA=
=FD=BE=DD=CE=C4=BC=FE=A3=AC=B6=F8=B1=BB=D2=D1=CC=E1=BD=BB=CA=C2=CE=F1=D0=DE=
=B8=C4=B9=FD=B5=C4=CA=FD=BE=DD=BF=E9=D4=F2=D3=D0=BF=C9=C4=DC=B2=BB=D4=DA=CA=
=FD=BE=DD=CE=C4=BC=FE=D6=D0=A1=A3<BR>=A1=A1</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">143</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">Two =
potential=20
      problems can result if an instance failure occurs:
      <UL>
        <LI style=3D"MARGIN-BOTTOM: 10px">Data blocks modified by a =
transaction=20
        might not be written to the datafiles at commit time and might =
only=20
        appear in the redo log. Therefore, the redo log contains changes =
that=20
        must be reapplied to the database during recovery.=20
        <LI style=3D"MARGIN-BOTTOM: 10px">After the roll forward phase, =
the=20
        datafiles could contain changes that had not been committed at =
the time=20
        of the failure. These uncommitted changes must be rolled back to =
ensure=20
        transactional consistency. These changes were either saved to =
the=20
        datafiles before the failure, or introduced during the roll =
forward=20
        phase. </LI></UL></TD>
    <TD vAlign=3Dtop align=3Dleft =
width=3D"48%">=B7=A2=C9=FA=CA=B5=C0=FD=B9=CA=D5=CF=A3=A8instance =
failure=A3=A9=CA=B1=B4=E6=D4=DA=C1=BD=D6=D6=C7=B1=D4=DA=B5=C4=CE=CA=CC=E2=
=A3=BA
      <UL>
        <LI=20
        style=3D"MARGIN-BOTTOM: =
10px">=B1=BB=C4=B3=B8=F6=CA=C2=CE=F1=D0=DE=B8=C4=B9=FD=B5=C4=CA=FD=BE=DD=BF=
=E9=D4=DA=CA=C2=CE=F1=CC=E1=BD=BB=CA=B1=BF=C9=C4=DC=BB=B9=C3=BB=D3=D0=B1=BB=
=D0=B4=C8=EB=CA=FD=BE=DD=CE=C4=BC=FE=A3=AC=D0=DE=B8=C4=D0=C5=CF=A2=D6=BB=B4=
=E6=D4=DA=D3=DA=D6=D8=D7=F6=C8=D5=D6=BE=A3=A8redo=20
        =
log=A3=A9=D6=D0=A1=A3=D2=F2=B4=CB=A3=AC=D6=D8=D7=F6=C8=D5=D6=BE=D6=D0=B5=C4=
=D0=DE=B8=C4=D0=C5=CF=A2=D4=DA=BB=D6=B8=B4=A3=A8recover=A3=A9=CA=FD=BE=DD=
=BF=E2=CA=B1=D0=E8=D2=AA=D6=D8=D0=C2=D3=A6=D3=C3=B5=BD=CA=FD=BE=DD=CE=C4=BC=
=FE=D6=D0=A1=A3=20
        <LI style=3D"MARGIN-BOTTOM: =
10px">=D4=DA=D6=B4=D0=D0=C1=CB=C7=B0=B9=F6=A3=A8roll=20
        =
forward=A3=A9=B2=D9=D7=F7=BA=F3=A3=AC=CA=FD=BE=DD=CE=C4=BC=FE=D6=D0=BF=C9=
=C4=DC=BB=E1=B0=FC=BA=AC=CA=B5=C0=FD=B9=CA=D5=CF=B7=A2=C9=FA=CA=B1=BB=B9=CE=
=B4=CC=E1=BD=BB=B5=C4=D0=DE=B8=C4=A1=A3=D5=E2=D0=A9=CE=B4=CC=E1=BD=BB=CA=C2=
=CE=F1=B1=D8=D0=EB=B1=BB=BB=D8=B9=F6=A3=A8roll=20
        =
back=A3=A9=D2=D4=B1=A3=D6=A4=CA=C2=CE=F1=D2=BB=D6=C2=D0=D4=A3=A8transacti=
onal=20
        =
consistency=A3=A9=A1=A3=D5=E2=D0=A9=CE=B4=CC=E1=BD=BB=CA=C2=CE=F1=BF=C9=C4=
=DC=CA=C7=D4=DA=CA=B5=C0=FD=B9=CA=D5=CF=B7=A2=C9=FA=C7=B0=B1=BB=D0=B4=C8=EB=
=CA=FD=BE=DD=CE=C4=BC=FE=B5=C4=A3=AC=D2=B2=BF=C9=C4=DC=CA=C7=D4=DA=D6=B4=D0=
=D0=C7=B0=B9=F6=B1=BB=D0=B4=C8=EB=CA=FD=BE=DD=CE=C4=BC=FE=B5=C4=A1=A3=20
</LI></UL></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">144</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">To =
solve this=20
      dilemma, two separate steps are generally used by Oracle for a =
successful=20
      recovery of a system failure: rolling forward with the redo log =
(<SPAN=20
      style=3D"BACKGROUND-COLOR: #ffff00">cache recovery</SPAN>) and =
rolling back=20
      with the rollback or undo segments (<SPAN=20
      style=3D"BACKGROUND-COLOR: #ffff00">transaction =
recovery</SPAN>).<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft =
width=3D"48%">=CE=AA=BD=E2=BE=F6=C9=CF=CA=F6=C1=BD=B8=F6=CE=CA=CC=E2=A3=AC=
Oracle=20
      =
=D0=E8=D2=AA=B7=D6=C1=BD=B2=BD=B6=D4=CF=B5=CD=B3=B9=CA=D5=CF=BD=F8=D0=D0=BB=
=D6=B8=B4=A1=A3=CA=D7=CF=C8=C0=FB=D3=C3=D6=D8=D7=F6=C8=D5=D6=BE=BD=F8=D0=D0=
=C7=B0=B9=F6=B2=D9=D7=F7=A3=AC=BC=B4=BB=BA=B4=E6=BB=D6=B8=B4=A3=A8cache =
recovery=A3=A9=A3=BB=D6=AE=BA=F3=C0=FB=D3=C3=BB=D8=B9=F6=B6=CE=A3=A8rollb=
ack=20
      segment=A3=A9=BB=F2=BB=B9=D4=AD=B6=CE=A3=A8undo =
segment=A3=A9=BD=F8=D0=D0=BB=D8=B9=F6=B2=D9=D7=F7=A3=AC=BC=B4=CA=C2=CE=F1=
=BB=D6=B8=B4=A3=A8transaction recovery=A3=A9=A1=A3<BR>=A1=A1</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">145</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">
      <H4><A name=3De.15.2.4.1.1></A>Overview of Cache =
Recovery</H4></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">
      <H4><A name=3Dc.15.2.4.1.1></A>15.2.4.1.1 =
=BB=BA=B4=E6=BB=D6=B8=B4=B8=C5=CA=F6</H4></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">146</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">The <A =

      =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/a">online=20
      redo log</A> is a set of operating system files that record all =
changes=20
      made to any database block, including data, index, and rollback =
segments,=20
      whether the changes are committed or uncommitted. All changes to =
Oracle=20
      blocks are recorded in the online log.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%"><A=20
      =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/a">=C1=AA=BB=FA=D6=D8=D7=F6=C8=D5=D6=BE</A>=A3=A8online=20
      redo =
log=A3=A9=CA=C7=D2=BB=D7=E9=B4=E6=D4=DA=D3=DA=B2=D9=D7=F7=CF=B5=CD=B3=D6=D0=
=B5=C4=CE=C4=BC=FE=A3=AC=C6=E4=D7=F7=D3=C3=CA=C7=BC=C7=C2=BC=B6=D4=CB=F9=D3=
=D0=CA=FD=BE=DD=BF=E9=D2=D1=CC=E1=BD=BB=BB=F2=CE=B4=CC=E1=BD=BB=B5=C4=D0=DE=
=B8=C4=A3=AC=B0=FC=C0=A8=B6=D4=CA=FD=BE=DD=A3=AC=CB=F7=D2=FD=A3=AC=BC=B0=BB=
=D8=B9=F6=B6=CE=B5=C8=B5=C4=D0=DE=B8=C4=A1=A3=B6=D4 Oracle=20
      =
=CA=FD=BE=DD=BF=E9=B5=C4=CB=F9=D3=D0=D0=DE=B8=C4=B6=BC=B1=BB=BC=C7=C2=BC=D4=
=DA=D6=D8=D7=F6=C8=D5=D6=BE=D6=D0=A1=A3<BR>=A1=A1</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">147</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">The =
first step of=20
      recovery from an instance or disk failure is called <A=20
      =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/a"><SPAN=20
      style=3D"BACKGROUND-COLOR: #ffff00">cache recovery</SPAN></A> or =
<A=20
      =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/a">rolling=20
      forward</A>, and involves reapplying all of the changes recorded =
in the=20
      redo log to the datafiles. Because rollback data is also recorded =
in the=20
      redo log, rolling forward also regenerates the corresponding =
rollback=20
      segments.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft =
width=3D"48%">=B6=D4=B7=A2=C9=FA=C1=CB=CA=B5=C0=FD=B9=CA=D5=CF=A3=A8insta=
nce failure=A3=A9=BB=F2=B4=C5=C5=CC=B9=CA=D5=CF=A3=A8disk=20
      =
failure=A3=A9=B5=C4=CA=FD=BE=DD=BF=E2=BD=F8=D0=D0=BB=D6=B8=B4=A3=A8recove=
ry=A3=A9=B5=C4=B5=DA=D2=BB=B2=BD=B1=BB=B3=C6=CE=AA<A=20
      =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/a">=BB=BA=B4=E6=BB=D6=B8=B4</A>=A3=A8cache=20
      recovery=A3=A9=BB=F2<A=20
      =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/a">=C7=B0=B9=F6</A>=A3=A8rolling=20
      =
forward=A3=A9=A3=AC=B4=CB=B2=BD=D6=E8=BD=AB=D6=D8=D7=F6=C8=D5=D6=BE=D6=D0=
=B5=C4=CB=F9=D3=D0=D0=DE=B8=C4=BC=C7=C2=BC=D6=D8=D0=C2=D3=A6=D3=C3=B5=BD=CA=
=FD=BE=DD=CE=C4=BC=FE=C9=CF=A1=A3=B6=D4=BB=D8=B9=F6=CA=FD=BE=DD=B5=C4=D0=DE=
=B8=C4=D2=B2=BB=E1=B1=BB=BC=C7=C2=BC=B5=BD=D6=D8=D7=F6=C8=D5=D6=BE=D6=D0=A3=
=AC=D2=F2=B4=CB=D4=DA=C7=B0=B9=F6=B9=FD=B3=CC=D6=D0=BB=B9=BD=AB=D6=D8=D0=C2=
=C9=FA=B3=C9=CF=E0=B9=D8=B5=C4=BB=D8=B9=F6=B6=CE=A1=A3<BR>=A1=A1</TD></TR=
>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">148</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"48%">Rolling forward=20
      proceeds through as many redo log files as necessary to bring the =
database=20
      forward in time. Rolling forward usually includes online redo log =
files=20
      (instance recovery or media recovery) and could include archived =
redo log=20
      files (media recovery only).<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft=20
      =
width=3D"48%">=C7=B0=B9=F6=B9=FD=B3=CC=BD=AB=C0=FB=D3=C3=B1=D8=D2=AA=B5=C4=
=D6=D8=D7=F6=C8=D5=D6=BE=CE=C4=BC=FE=B0=D1=CA=FD=BE=DD=BF=E2=C7=B0=B9=F6=B5=
=BD=C4=B3=D2=BB=CA=B1=BC=E4=B5=E3=A1=A3=C7=B0=B9=F6=B9=FD=B3=CC=CD=A8=B3=A3=
=D0=E8=D2=AA=CA=B9=D3=C3=C1=AA=BB=FA=D6=D8=D7=F6=C8=D5=D6=BE=CE=C4=BC=FE=A3=
=A8=D4=DA=BD=F8=D0=D0=CA=B5=C0=FD=BB=D6=B8=B4=A3=A8instance=20
      recovery=A3=A9=BC=B0=BD=E9=D6=CA=BB=D6=B8=B4=A3=A8media =
recovery=A3=A9=CA=B1=B6=BC=D0=E8=D2=AA=A3=A9=A3=AC=D3=D0=CA=B1=BB=B9=D0=E8=
=D2=AA=CA=B9=D3=C3=B9=E9=B5=B5=D6=D8=D7=F6=C8=D5=D6=BE=CE=C4=BC=FE=A3=A8a=
rchived redo log=20
      =
file=A3=A9=A3=A8=D6=BB=D4=DA=BD=F8=D0=D0=BD=E9=D6=CA=BB=D6=B8=B4=CA=B1=D0=
=E8=D2=AA=A3=A9=A1=A3<BR>=A1=A1</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">149</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">After =
rolling=20
      forward, the data blocks contain all committed changes. They could =
also=20
      contain uncommitted changes that were either saved to the =
datafiles before=20
      the failure, or were recorded in the redo log and introduced =
during cache=20
      recovery.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft=20
      =
width=3D"48%">=C7=B0=B9=F6=BA=F3=A3=AC=CB=F9=D3=D0=D2=D1=CC=E1=BD=BB=B5=C4=
=D0=DE=B8=C4=B6=BC=BD=AB=BC=C7=C2=BC=B5=BD=CA=FD=BE=DD=CE=C4=BC=FE=C4=DA=A1=
=A3=B5=AB=CA=FD=BE=DD=CE=C4=BC=FE=BB=B9=D3=D0=BF=C9=C4=DC=B3=F6=CF=D6=CE=B4=
=CC=E1=BD=BB=B5=C4=D0=DE=B8=C4=A1=A3=D5=E2=D0=A9=D0=DE=B8=C4=BF=C9=C4=DC=CA=
=C7=D4=DA=B9=CA=D5=CF=C7=B0=B1=BB=D0=B4=C8=EB=CA=FD=BE=DD=CE=C4=BC=FE=B5=C4=
=A3=AC=D2=B2=BF=C9=C4=DC=CA=C7=BC=C7=C2=BC=D4=DA=D6=D8=D7=F6=C8=D5=D6=BE=D6=
=D0=B2=A2=D4=DA=BB=BA=B4=E6=BB=D6=B8=B4=CA=B1=B1=BB=D0=B4=C8=EB=CA=FD=BE=DD=
=CE=C4=BC=FE=B5=C4=A1=A3<BR>=A1=A1</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">150</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">
      <H4><A name=3De.15.2.4.1.2></A>Overview of Transaction =
Recovery</H4></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">
      <H4><A name=3Dc.15.2.4.1.2></A>15.2.4.1.2 =
=CA=C2=CE=F1=BB=D6=B8=B4=B8=C5=CA=F6</H4></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">151</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">You =
can run Oracle=20
      in either <A=20
      =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/a">manual=20
      undo management mode</A> or <A=20
      =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/a">automatic=20
      undo management mode</A>. In manual mode, you must create and =
manage <A=20
      =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/a">rollback=20
      segment</A>s to record the before-image of changes to the =
database. In=20
      automatic undo management mode, you create one or more undo =
tablespaces.=20
      These undo tablespaces contain undo segments similar to =
traditional=20
      rollback segments. The main difference is that Oracle manages the =
undo for=20
      you.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">Oracle =
=BF=C9=D2=D4=D4=CB=D0=D0=D4=DA<A=20
      =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/a">=CA=D6=B9=A4=BB=B9=D4=AD=B9=DC=C0=ED=C4=A3=CA=BD</A>=A3=A8=
manual=20
      undo management mode=A3=A9=BB=F2<A=20
      =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/a">=D7=D4=B6=AF=BB=B9=D4=AD=B9=DC=C0=ED=C4=A3=CA=BD</A>=A3=A8=
automatic=20
      undo management =
mode=A3=A9=CF=C2=A1=A3=D4=DA=CA=D6=B9=A4=C4=A3=CA=BD=CF=C2=A3=AC=D3=C3=BB=
=A7=D0=E8=D2=AA=CA=D6=B9=A4=B9=DC=C0=ED=D3=C3=D3=DA=BC=C7=C2=BC=CA=FD=BE=DD=
=D0=DE=B8=C4=C7=B0=B8=B1=B1=BE=A3=A8before-image=A3=A9=B5=C4<A=20
      =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/a">=BB=D8=B9=F6=B6=CE</A>=A3=A8rollback=20
      =
segment=A3=A9=A1=A3=B6=F8=D4=DA=D7=D4=B6=AF=B9=DC=C0=ED=C4=A3=CA=BD=CF=C2=
=A3=AC=D3=C3=BB=A7=D0=E8=D2=AA=B4=B4=BD=A8=D2=BB=B8=F6=BB=F2=B6=E0=B8=F6=BB=
=B9=D4=AD=B1=ED=BF=D5=BC=E4=A3=A8undo =
tablespace=A3=A9=A1=A3=BB=B9=D4=AD=B1=ED=BF=D5=BC=E4=C4=DA=B5=C4=BB=B9=D4=
=AD=B6=CE=A3=A8undo=20
      =
segment=A3=A9=D3=EB=B4=AB=CD=B3=B5=C4=BB=D8=B9=F6=B6=CE=C0=E0=CB=C6=A1=A3=
=D5=E2=C1=BD=D6=D6=C4=A3=CA=BD=B5=C4=D6=F7=D2=AA=C7=F8=B1=F0=CA=C7=A3=AC=D4=
=DA=D7=D4=B6=AF=BB=B9=D4=AD=B9=DC=C0=ED=C4=A3=CA=BD=CF=C2=A3=AC=BB=B9=D4=AD=
=D0=C5=CF=A2=D3=C9 Oracle =
=B8=BA=D4=F0=B9=DC=C0=ED=A1=A3<BR>=A1=A1</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">152</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">Undo =
blocks (whether=20
      in rollback segments or automatic undo tablespaces) record =
database=20
      actions that should be undone during certain database operations. =
In=20
      database recovery, the undo blocks roll back the effects of =
uncommitted=20
      transactions previously applied by the rolling forward =
phase.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft =
width=3D"48%">=CE=DE=C2=DB=CA=C7=BB=D8=B9=F6=B6=CE=BB=B9=CA=C7=D7=D4=B6=AF=
=BB=B9=D4=AD=B1=ED=BF=D5=BC=E4=A3=AC=B6=BC=CA=B9=D3=C3=BB=B9=D4=AD=BF=E9=A3=
=A8undo=20
      =
block=A3=A9=C0=B4=BC=C7=C2=BC=D3=D0=BF=C9=C4=DC=B1=BB=BB=B9=D4=AD=B5=C4=CA=
=FD=BE=DD=BF=E2=D0=C5=CF=A2=A1=A3=D4=DA=CA=FD=BE=DD=BF=E2=BB=D6=B8=B4=A3=A8=
recovery=A3=A9=D6=D0=A3=AC=D0=E8=D2=AA=C0=FB=D3=C3=BB=B9=D4=AD=BF=E9=BB=D8=
=B9=F6=A3=A8roll back=A3=A9=D4=DA=C7=B0=B9=F6=A3=A8rolling=20
      =
forward=A3=A9=CA=B1=B1=BB=D3=A6=D3=C3=B5=BD=CA=FD=BE=DD=CE=C4=BC=FE=B5=C4=
=CE=B4=CC=E1=BD=BB=CA=C2=CE=F1=A1=A3<BR>=A1=A1</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">153</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">After =
the roll=20
      forward, any changes that were not committed must be undone. =
Oracle=20
      applies undo blocks to roll back uncommitted changes in data =
blocks that=20
      were either written before the failure or introduced by redo =
application=20
      during cache recovery. This process is called <A=20
      =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/a">rolling=20
      back</A> or <A=20
      =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/a">transaction=20
      recovery</A>.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft =
width=3D"48%">=D4=DA=C7=B0=B9=F6=BA=F3=A3=AC=CB=F9=D3=D0=CE=B4=CC=E1=BD=BB=
=B5=C4=D0=DE=B8=C4=B1=D8=D0=EB=B1=BB=BB=B9=D4=AD=A1=A3Oracle=20
      =
=C0=FB=D3=C3=BB=B9=D4=AD=BF=E9=C0=B4=BB=D8=B9=F6=CA=FD=BE=DD=BF=E9=D6=D0=CE=
=B4=CC=E1=BD=BB=B5=C4=D0=DE=B8=C4=A3=AC=D5=E2=D0=A9=D0=DE=B8=C4=BF=C9=C4=DC=
=CA=C7=D4=DA=B9=CA=D5=CF=C7=B0=B1=BB=D0=B4=C8=EB=CA=FD=BE=DD=CE=C4=BC=FE=B5=
=C4=A3=AC=D2=B2=BF=C9=C4=DC=CA=C7=D4=DA=BB=BA=B4=E6=BB=D6=B8=B4=A3=A8cach=
e=20
      =
recovery=A3=A9=CA=B1=B1=BB=D0=B4=C8=EB=CA=FD=BE=DD=CE=C4=BC=FE=B5=C4=A1=A3=
=C9=CF=CA=F6=B9=FD=B3=CC=B1=BB=B3=C6=CE=AA<A=20
      =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/a">=BB=D8=B9=F6</A>=A3=A8rolling=20
      back=A3=A9=BB=F2<A=20
      =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/a">=CA=C2=CE=F1=BB=D6=B8=B4</A>=A3=A8transaction=20
      recovery=A3=A9=A1=A3<BR>=A1=A1</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">154</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%"><A=20
      =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#e.f.15.3"=20
      target=3D_self>Figure 15-3</A> illustrates rolling forward and =
rolling back,=20
      the two steps necessary to recover from any type of system=20
failure.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%"><A=20
      =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#c.f.15.3">=CD=BC=20
      15-3</A> =
=D5=B9=CA=BE=C1=CB=C7=B0=B9=F6=BC=B0=BB=D8=B9=F6=B9=FD=B3=CC=A3=AC=D5=E2=C1=
=BD=B8=F6=B9=FD=B3=CC=CA=C7=B6=D4=CB=F9=D3=D0=CF=B5=CD=B3=B9=CA=D5=CF=A3=A8=
system =
failure=A3=A9=BD=F8=D0=D0=BB=D6=B8=B4=CA=B1=B5=C4=B1=D8=D2=AA=B2=BD=D6=E8=
=A1=A3<BR>=A1=A1</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">155</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"48%"><I><B><FONT=20
      size=3D2><A name=3De.f.15.3></A>Figure 15-3 Basic Recovery Steps: =
Rolling=20
      Forward and Rolling Back<BR>=A1=A1</FONT></B></I></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%"><A =
name=3Dc.f.15.3></A><I><B><FONT=20
      size=3D2>=CD=BC 15-3 </FONT></B></I><FONT=20
      =
size=3D2><B><I>=BB=F9=B1=BE=BB=D6=B8=B4=B2=BD=D6=E8=A3=BA=C7=B0=B9=F6=D3=EB=
=BB=D8=B9=F6<BR>=A1=A1</I></B></FONT></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">156</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">
      <P align=3Dcenter><A=20
      =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/img=
/e.cncpt196.gif"><IMG=20
      height=3D245=20
      =
src=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/img/=
e.cncpt196.gif"=20
      width=3D470 border=3D0></A><BR>=A1=A1</P></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">
      <P align=3Dcenter><A=20
      =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/img=
/c.cncpt196.gif"><IMG=20
      height=3D245=20
      =
src=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/img/=
c.cncpt196.gif"=20
      width=3D470 border=3D0></A><BR>=A1=A1</P></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">157</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">
      <BLOCKQUOTE><FONT size=3D2>Figure 15-3 shows a backup of a =
database that=20
        needs recovery. First, redo logs are applied to the database =
with=20
        committed and uncommitted transactions. Then undo blocks are =
applied the=20
        database with committed transactions.</FONT></BLOCKQUOTE></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">
      <BLOCKQUOTE><FONT size=3D2>=CD=BC 15-3=20
        =
=CF=D4=CA=BE=C1=CB=D2=BB=B8=F6=C0=FB=D3=C3=B1=B8=B7=DD=B8=B4=D4=AD=B5=C4=CA=
=FD=BE=DD=BF=E2=A3=AC=D0=E8=D2=AA=BD=F8=D0=D0=BB=D6=B8=B4=A1=A3=CA=D7=CF=C8=
=BD=AB=D6=D8=D7=F6=C8=D5=D6=BE=D6=D0=B5=C4=D2=D1=CC=E1=BD=BB=BC=B0=CE=B4=CC=
=E1=BD=BB=CA=C2=CE=F1=D3=A6=D3=C3=B5=BD=CA=FD=BE=DD=BF=E2=D6=D0=A1=A3=D6=AE=
=BA=F3=BD=AB=BB=B9=D4=AD=BF=E9=D3=A6=D3=C3=B5=BD=CA=FD=BE=DD=BF=E2=A3=AC=BB=
=B9=D4=AD=CE=B4=CC=E1=BD=BB=CA=C2=CE=F1=A1=A3</FONT></BLOCKQUOTE></TD></T=
R>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">158</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%"><SPAN=20
      style=3D"BACKGROUND-COLOR: #ffff00">Oracle can roll back multiple=20
      transactions simultaneously as needed.</SPAN> All transactions =
systemwide=20
      that were active at the time of failure are marked as terminated. =
<SPAN=20
      style=3D"BACKGROUND-COLOR: #ffff00">Instead of waiting for SMON to =
roll back=20
      terminated transactions, new transactions can recover blocking=20
      transactions themselves to get the row locks they =
need.</SPAN><BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">Oracle=20
      =
=C4=DC=B9=BB=CD=AC=CA=B1=BB=D8=B9=F6=B6=E0=B8=F6=CA=C2=CE=F1=A1=A3=B9=CA=D5=
=CF=B7=A2=C9=FA=CA=B1=A3=AC=CF=B5=CD=B3=C4=DA=CB=F9=D3=D0=BB=EE=B6=AF=A3=A8=
active=A3=A9=CA=C2=CE=F1=B6=BC=BD=AB=B1=BB=B1=EA=D6=BE=CE=AA=D6=D5=D6=B9=A3=
=A8terminated=A3=A9=A1=A3=B3=FD=C1=CB SMON=20
      =
=C4=DC=B9=BB=BB=D8=B9=F6=D6=D5=D6=B9=B5=C4=CA=C2=CE=F1=D6=AE=CD=E2=A3=AC=D0=
=C2=CA=C2=CE=F1=D2=B2=C4=DC=BB=D6=B8=B4=D6=D5=D6=B9=B5=C4=CA=C2=CE=F1=A3=AC=
=D2=D4=B1=E3=BB=F1=B5=C3=C6=E4=CB=F9=D0=E8=B5=C4=CA=FD=BE=DD=D0=D0=C9=CF=B5=
=C4=CB=F8=A1=A3<BR>=A1=A1</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">159</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">
      <H3><A name=3De.15.2.4.2></A>Overview of Instance and Crash =
Recovery</H3></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">
      <H3><A name=3Dc.15.2.4.2></A>15.2.4.2 =
=CA=B5=C0=FD=BB=D6=B8=B4=BC=B0=B1=C0=C0=A3=BB=D6=B8=B4=B8=C5=CA=F6</H3></=
TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">160</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">Crash =
recovery is=20
      used to recover from a failure either when a single-instance =
database=20
      fails or all instances of an Oracle Real Application Clusters =
database=20
      fail. Instance recovery refers to the case where a surviving =
instance=20
      recovers a failed instance in an Oracle Real Application Clusters=20
      database.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft =
width=3D"48%">=B5=B1=D2=BB=B8=F6=B5=A5=CA=B5=C0=FD=CA=FD=BE=DD=BF=E2=B3=F6=
=CF=D6=B9=CA=D5=CF=A3=AC=BB=F2 RAC=20
      =
=CA=FD=BE=DD=BF=E2=D6=D0=B5=C4=CB=F9=D3=D0=CA=B5=C0=FD=B6=BC=B3=F6=CF=D6=B9=
=CA=D5=CF=CA=B1=A3=AC=D0=E8=D2=AA=B6=D4=CA=FD=BE=DD=BF=E2=BD=F8=D0=D0=B1=C0=
=C0=A3=BB=D6=B8=B4=A3=A8crash recovery=A3=A9=A1=A3=D4=DA RAC=20
      =
=CA=FD=BE=DD=BF=E2=D6=D0=A3=AC=C0=FB=D3=C3=D5=FD=B3=A3=CA=B5=C0=FD=B6=D4=B9=
=CA=D5=CF=CA=B5=C0=FD=BD=F8=D0=D0=BB=D6=B8=B4=B1=BB=B3=C6=CE=AA=CA=B5=C0=FD=
=BB=D6=B8=B4=A3=A8instance recovery=A3=A9=A1=A3<BR>=A1=A1</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">161</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">The =
goal of crash=20
      and instance recovery is to restore the data block changes located =
in the=20
      cache of the terminated instance and to close the <SPAN=20
      style=3D"BACKGROUND-COLOR: #ffff00">redo thread</SPAN> that was =
left open.=20
      Instance and crash recovery use only online redo log files and =
current=20
      online datafiles. <SPAN style=3D"BACKGROUND-COLOR: #ffff00">Oracle =
recovers=20
      the </SPAN><A=20
      =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/a"><SPAN=20
      style=3D"BACKGROUND-COLOR: #ffff00">redo thread</SPAN></A><SPAN=20
      style=3D"BACKGROUND-COLOR: #ffff00">s of the terminated instances=20
      together.</SPAN><BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft=20
      =
width=3D"48%">=CA=B5=C0=FD=BB=D6=B8=B4=BC=B0=B1=C0=C0=A3=BB=D6=B8=B4=B5=C4=
=D7=F7=D3=C3=D3=D0=C1=BD=B8=F6=A3=BA=C6=E4=D2=BB=CA=C7=BB=D6=B8=B4=D2=EC=B3=
=A3=D6=D5=D6=B9=CA=B5=C0=FD=A3=A8terminated=20
      =
instance=A3=A9=B1=BB=D0=DE=B8=C4=B9=FD=B5=AB=D6=BB=B4=E6=D4=DA=D3=DA=BB=BA=
=B4=E6=C4=DA=B5=C4=CA=FD=BE=DD=BF=E9=A3=BB=C6=E4=B6=FE=CA=C7=B9=D8=B1=D5=CA=
=B5=C0=FD=D6=D5=D6=B9=CA=B1=CE=B4=BD=E1=CA=F8=B5=C4=D6=D8=D7=F6=BD=F8=B3=CC=
=A3=A8redo=20
      =
thread=A3=A9=A1=A3=CA=B5=C0=FD=BB=D6=B8=B4=BC=B0=B1=C0=C0=A3=BB=D6=B8=B4=D6=
=BB=CA=B9=D3=C3=C1=AA=BB=FA=D6=D8=D7=F6=C8=D5=D6=BE=A3=A8online redo =
log=A3=A9=CE=C4=BC=FE=A3=AC=C7=D2=D6=BB=D5=EB=B6=D4=C1=AA=BB=FA=CA=FD=BE=DD=
=CE=C4=BC=FE=A1=A3Oracle=20
      =
=D4=DA=CA=B5=C0=FD=BB=D6=B8=B4=BC=B0=B1=C0=C0=A3=BB=D6=B8=B4=CA=B1=A3=AC=BB=
=B9=BD=AB=BB=D6=B8=B4<A=20
      =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/a">=D6=D8=D7=F6=BD=F8=B3=CC</A>=A1=A3<BR>=A1=A1</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">162</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">Crash =
and instance=20
      recovery involve two distinct operations: rolling forward the =
current,=20
      online datafiles by applying both committed and uncommitted =
transactions=20
      contained in online redo records, and then rolling back changes =
made in=20
      uncommitted transactions to their original state.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft=20
      =
width=3D"48%">=CA=B5=C0=FD=BB=D6=B8=B4=BC=B0=B1=C0=C0=A3=BB=D6=B8=B4=B9=FD=
=B3=CC=B0=FC=BA=AC=C1=BD=CF=EE=B6=C0=C1=A2=B5=C4=C8=CE=CE=F1=A3=BA=CA=D7=CF=
=C8=C0=FB=D3=C3=C1=AA=BB=FA=D6=D8=D7=F6=C8=D5=D6=BE=C4=DA=BC=C7=C2=BC=B5=C4=
=D2=D1=CC=E1=BD=BB=BC=B0=CE=B4=CC=E1=BD=BB=CA=C2=CE=F1=B6=D4=B5=B1=C7=B0=C1=
=AA=BB=FA=CA=FD=BE=DD=CE=C4=BC=FE=BD=F8=D0=D0=C7=B0=B9=F6=A3=A8rolling=20
      forward=A3=A9=A3=BB=D6=AE=BA=F3=BB=D8=B9=F6=A3=A8rolling =
back=A3=A9=CE=B4=CC=E1=BD=BB=CA=C2=CE=F1=A1=A3<BR>=A1=A1</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">163</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">Crash =
and instance=20
      recovery have the following shared characteristics:
      <UL>
        <LI style=3D"MARGIN-BOTTOM: 10px">Redo the changes using the =
current=20
        online datafiles (as left on disk after the failure or <FONT=20
        color=3D#0000ff>SHUTDOWN ABORT</FONT>)=20
        <LI style=3D"MARGIN-BOTTOM: 10px">Use only the online redo logs =
and never=20
        require the use of the archived logs=20
        <LI style=3D"MARGIN-BOTTOM: 10px">Have a recovery time governed =
by the=20
        number of terminated instances, amount of redo generated in each =

        terminated redo thread since the last checkpoint, and by=20
        user-configurable factors such as the number and size of redo =
log files,=20
        checkpoint frequency, and the parallel recovery setting =
</LI></UL></TD>
    <TD vAlign=3Dtop align=3Dleft =
width=3D"48%">=CA=B5=C0=FD=BB=D6=B8=B4=BC=B0=B1=C0=C0=A3=BB=D6=B8=B4=D3=D0=
=D2=D4=CF=C2=B9=B2=CD=AC=D6=AE=B4=A6=A3=BA
      <UL>
        <LI style=3D"MARGIN-BOTTOM: =
10px">=B6=D4=B5=B1=C7=B0=C1=AA=BB=FA=B5=C4=CA=FD=BE=DD=CE=C4=BC=FE=BD=F8=D0=
=D0=D6=D8=D7=F6 (=BC=B4=B7=A2=C9=FA=B9=CA=D5=CF=BB=F2=CC=E1=BD=BB=C1=CB =
<FONT=20
        color=3D#0000ff>SHUTDOWN ABORT =
</FONT>=C3=FC=C1=EE=BA=F3=B1=A3=B4=E6=D4=DA=B4=C5=C5=CC=C9=CF=B5=C4=CE=C4=
=BC=FE)=A1=A3=20
        <LI style=3D"MARGIN-BOTTOM: =
10px">=D6=BB=CA=B9=D3=C3=C1=AA=BB=FA=D6=D8=D7=F6=C8=D5=D6=BE=A3=AC=B6=F8=B2=
=BB=BB=E1=CA=B9=D3=C3=B9=E9=B5=B5=D6=D8=D7=F6=C8=D5=D6=BE=A3=A8archived =
log=A3=A9=A1=A3=20
        <LI=20
        style=3D"MARGIN-BOTTOM: =
10px">=BB=D6=B8=B4=CB=F9=D0=E8=CA=B1=BC=E4=D3=C9=D2=D4=CF=C2=BC=B8=B8=F6=D2=
=F2=CB=D8=BE=F6=B6=A8=A3=BA=D2=EC=B3=A3=D6=D5=D6=B9=B5=C4=CA=B5=C0=FD=CA=FD=
=C1=BF=A3=BB=D2=EC=B3=A3=D6=D5=D6=B9=B5=C4=D6=D8=D7=F6=BD=F8=B3=CC=D4=DA=B6=
=D4=BA=F3=D2=BB=B4=CE=BC=EC=B2=E9=B5=E3=A3=A8checkpoint=A3=A9=BA=F3=B2=FA=
=C9=FA=B5=C4=D6=D8=D7=F6=C8=D5=D6=BE=C1=BF=A3=BB=BB=B9=D3=D0=D2=BB=D0=A9 =

        =
=D3=C9=D3=C3=BB=A7=C5=E4=D6=C3=B5=C4=B2=CE=CA=FD=A3=AC=C0=FD=C8=E7=D6=D8=D7=
=F6=C8=D5=D6=BE=CE=C4=BC=FE=B5=C4=CA=FD=C1=BF=BC=B0=C8=DD=C1=BF=A3=AC=BC=EC=
=B2=E9=B5=E3=B7=A2=C9=FA=C6=B5=C2=CA=A3=AC=D2=D4=BC=B0=B2=A2=D0=D0=BB=D6=B8=
=B4=C9=E8=D6=C3=B5=C8=A1=A3 </LI></UL></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">164</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">Oracle =
performs this=20
      recovery automatically on two occasions:
      <UL>
        <LI style=3D"MARGIN-BOTTOM: 10px">At the first database open =
after the=20
        failure of a single-instance database or all instances of an =
Oracle Real=20
        Applications Cluster database (crash recovery).=20
        <LI style=3D"MARGIN-BOTTOM: 10px">When some but not all =
instances of an=20
        Oracle Real Application Clusters configuration fail (instance =
recovery).=20
        The recovery is performed automatically by a surviving instance =
in the=20
        configuration. </LI></UL></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">Oracle =
=D4=DA=D2=D4=CF=C2=C1=BD=D6=D6=C7=E9=BF=F6=CF=C2=D7=D4=B6=AF=B5=D8=BD=F8=D0=
=D0=CA=B5=C0=FD=BB=D6=B8=B4=BB=F2=B1=C0=C0=A3=BB=D6=B8=B4=A3=BA
      <UL>
        <LI style=3D"MARGIN-BOTTOM: =
10px">=B5=A5=CA=B5=C0=FD=CA=FD=BE=DD=BF=E2=BB=F2 RAC=20
        =
=CA=FD=BE=DD=BF=E2=B5=C4=CB=F9=D3=D0=CA=B5=C0=FD=B7=A2=C9=FA=B9=CA=D5=CF=A3=
=A8=B4=CB=CA=B1=BD=F8=D0=D0=B5=C4=CA=C7=B1=C0=C0=A3=BB=D6=B8=B4=A3=A9=BA=F3=
=B5=DA=D2=BB=B4=CE=B4=F2=BF=AA=A3=A8open=A3=A9=CA=FD=BE=DD=BF=E2=CA=B1=A1=
=A3=20
        <LI style=3D"MARGIN-BOTTOM: 10px">=B5=B1 RAC=20
        =
=CA=FD=BE=DD=BF=E2=B5=C4=B2=BF=B7=D6=CA=B5=C0=FD=B7=A2=C9=FA=B9=CA=D5=CF=CA=
=B1=A3=A8=B4=CB=CA=B1=BD=F8=D0=D0=B5=C4=CA=C7=CA=B5=C0=FD=BB=D6=B8=B4=A3=A9=
=A1=A3=BB=D6=B8=B4=CA=C7=D3=C9=CF=B5=CD=B3=D6=D0=CE=B4=B7=A2=C9=FA=B9=CA=D5=
=CF=B5=C4=CA=B5=C0=FD=D6=B4=D0=D0=B5=C4=A1=A3 </LI></UL></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">165</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">The =
important point=20
      is that in both crash and instance recovery, Oracle applies the =
redo=20
      automatically: no user intervention is required to supply redo =
logs.=20
      However, you can set parameters in the database server that can =
tune the=20
      duration of instance and crash recovery performance. Also, you can =
tune=20
      the rolling forward and rolling back phases of instance recovery=20
      separately.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft =
width=3D"48%">=CA=B5=C0=FD=BB=D6=B8=B4=BC=B0=B1=C0=C0=A3=BB=D6=B8=B4=B5=C4=
=D6=D8=D2=AA=CC=D8=B5=E3=CA=C7 Oracle=20
      =
=D7=D4=B6=AF=B5=D8=B6=D4=CA=FD=BE=DD=CE=C4=BC=FE=D3=A6=D3=C3=D6=D8=D7=F6=CA=
=FD=BE=DD=A3=AC=B6=F8=CE=DE=D0=E8=D3=C3=BB=A7=CA=D6=B9=A4=CC=E1=B9=A9=D6=D8=
=D7=F6=C8=D5=D6=BE=A1=A3=B5=AB=CA=C7=D3=C3=BB=A7=BF=C9=D2=D4=CD=A8=B9=FD=C9=
=E8=D6=C3=CA=FD=BE=DD=BF=E2=B7=FE=CE=F1=C6=F7=B5=C4=B2=CE=CA=FD=C0=B4=B5=F7=
=D5=FB=CA=B5=C0=FD=BB=D6=B8=B4=BC=B0=B1=C0=C0=A3=BB=D6=B8=B4=B5=C4=D0=D4=C4=
=DC=A1=A3=B4=CB=CD=E2=A3=AC=D3=C3=BB=A7=BF=C9=D2=D4=B6=D4=BB=D6=B8=B4=D6=D0=
=B5=C4=C7=B0=B9=F6=BC=B0=BB=D8=B9=F6=C1=BD=B8=F6=BD=D7=B6=CE=B5=A5=B6=C0=B5=
=F7=D5=FB=A1=A3<BR>=A1=A1</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">166</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">
      <BLOCKQUOTE><B>See Also:</B><BR><BR><A=20
        =
href=3D"http://download-west.oracle.com/docs/cd/B19306_01/backup.102/b141=
91/toc.htm">Oracle=20
        Database Backup and Recovery Advanced User's Guide</A> for a =
discussion=20
        of instance recovery mechanics and instructions for tuning =
instance and=20
        crash recovery </BLOCKQUOTE></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">
      <BLOCKQUOTE><B>=C1=ED=BC=FB=A3=BA</B><BR><BR><A=20
        =
href=3D"http://download-west.oracle.com/docs/cd/B19306_01/backup.102/b141=
91/toc.htm">Oracle=20
        Database Backup and Recovery Advanced User's Guide</A>=20
        =
=C1=CB=BD=E2=CA=B5=C0=FD=BB=D6=B8=B4=B5=C4=BB=FA=D6=C6=D2=D4=BC=B0=C8=E7=BA=
=CE=B5=F7=D5=FB=CA=B5=C0=FD=BB=D6=B8=B4=BC=B0=B1=C0=C0=A3=BB=D6=B8=B4=B5=C4=
=D0=D4=C4=DC</BLOCKQUOTE></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">167</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">
      <H1><SPAN style=3D"FONT-SIZE: 20pt"><A name=3De.15.3></A>Deciding =
Which=20
      Recovery Technique to Use</SPAN></H1></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">
      <H1><A name=3Dc.15.3></A><SPAN style=3D"FONT-SIZE: 20pt">15.3=20
      =
=C8=E7=BA=CE=D1=A1=D4=F1=CA=CA=B5=B1=B5=C4=BB=D6=B8=B4=B7=BD=CA=BD</SPAN>=
</H1></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">168</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">This =
section=20
      contains the following topics:
      <UL>
        <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
        =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#e.15.3.1"=20
        target=3D_self>When to Use Media Recovery</A>=20
        <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
        =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#e.15.3.2"=20
        target=3D_self>When to Use Oracle Flashback</A>=20
        <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
        =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#e.15.3.3"=20
        target=3D_self>When to Use CREATE TABLE AS SELECT Recovery</A>=20
        <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
        =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#e.15.3.4"=20
        target=3D_self>When to Use Import/Export Utilities Recovery</A>=20
        <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
        =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#e.15.3.5"=20
        target=3D_self>When to Use Tablespace Point-in-Time Recovery</A> =

    </LI></UL></TD>
    <TD vAlign=3Dtop align=3Dleft =
width=3D"48%">=B1=BE=BD=DA=B0=FC=BA=AC=D2=D4=CF=C2=D6=F7=CC=E2=A3=BA
      <UL>
        <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
        =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#c.15.3.1"=20
        =
target=3D_self>=BA=CE=CA=B1=B2=C9=D3=C3=BD=E9=D6=CA=BB=D6=B8=B4</A>=20
        <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
        =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#c.15.3.2"=20
        target=3D_self>=BA=CE=CA=B1=B2=C9=D3=C3 Oracle Flashback</A>=20
        <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
        =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#c.15.3.3"=20
        target=3D_self>=BA=CE=CA=B1=B2=C9=D3=C3 CREATE TABLE AS SELECT =
=BB=D6=B8=B4</A>=20
        <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
        =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#c.15.3.4"=20
        target=3D_self>=BA=CE=CA=B1=B2=C9=D3=C3 Import/Export =
=B9=A4=BE=DF=BB=D6=B8=B4</A>=20
        <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
        =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#c.15.3.5"=20
        =
target=3D_self>=BA=CE=CA=B1=B2=C9=D3=C3=B1=ED=BF=D5=BC=E4=B0=B4=CA=B1=BC=E4=
=B5=E3=BB=D6=B8=B4</A> </LI></UL></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">169</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">
      <H2><A name=3De.15.3.1></A>When to Use Media Recovery</H2></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">
      <H2><A name=3Dc.15.3.1></A>15.3.1 =
=BA=CE=CA=B1=B2=C9=CA=B9=D3=C3=BD=E9=D6=CA=BB=D6=B8=B4</H2></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">170</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">Use =
media recovery=20
      when one or more datafiles has been physically damaged. This can =
happen=20
      due to hardware errors or user errors, such as accidentally =
deleting a=20
      file. Complete media recovery is used with individual datafiles,=20
      tablespaces, or the entire database.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft =
width=3D"48%">=B5=B1=D2=BB=B8=F6=BB=F2=B6=E0=B8=F6=CA=FD=BE=DD=CE=C4=BC=FE=
=B7=A2=C9=FA=CE=EF=C0=ED=CB=F0=BB=B5=A3=A8physically=20
      =
damage=A3=A9=CA=B1=D0=E8=D2=AA=BD=F8=D0=D0=BD=E9=D6=CA=BB=D6=B8=B4=A3=A8m=
edia=20
      =
recovery=A3=A9=A1=A3=CE=EF=C0=ED=CB=F0=BB=B5=B5=C4=D4=AD=D2=F2=BF=C9=C4=DC=
=CA=C7=D3=B2=BC=FE=B9=CA=D5=CF=A3=AC=D2=B2=BF=C9=C4=DC=CA=C7=D3=C3=BB=A7=B2=
=D9=D7=F7=CA=A7=CE=F3=A3=A8=C0=FD=C8=E7=CE=F3=C9=BE=B3=FD=C1=CB=CE=C4=BC=FE=
=A3=A9=A1=A3=B6=D4=CA=FD=BE=DD=CE=C4=BC=FE=A3=AC=B1=ED=BF=D5=BC=E4=A3=AC=BB=
=F2=D5=FB=B8=F6=CA=FD=BE=DD=BF=E2=BE=F9=BF=C9=D2=D4=BD=F8=D0=D0=CD=EA=C8=AB=
=BD=E9=D6=CA=BB=D6=B8=B4=A3=A8complete=20
      media recovery=A3=A9=A1=A3<BR>=A1=A1</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">171</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">Use =
incomplete media=20
      recovery when the database has been logically damaged. This can =
happen due=20
      to application error or user error, such as accidentally deleting =
a table=20
      or tablespace. Incomplete media recovery is used only with the =
whole=20
      database, not with individual datafiles or tablespaces. (If you do =
not=20
      want to do incomplete media recovery of the entire database, you =
can do=20
      tablespace point-in-time recovery with individual =
tablespaces.)<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft =
width=3D"48%">=B5=B1=CA=FD=BE=DD=BF=E2=B7=A2=C9=FA=C2=DF=BC=AD=CB=F0=BB=B5=
=A3=A8logically=20
      =
damage=A3=A9=CA=B1=BF=C9=D2=D4=B2=C9=D3=C3=B2=BB=CD=EA=C8=AB=BD=E9=D6=CA=BB=
=D6=B8=B4=A3=A8incomplete media=20
      =
recovery=A3=A9=A1=A3=C2=DF=BC=AD=CB=F0=BB=B5=D6=F7=D2=AA=CA=C7=D3=C9=D3=DA=
=D3=A6=D3=C3=B3=CC=D0=F2=B4=ED=CE=F3=BB=F2=D3=C3=BB=A7=B2=D9=D7=F7=CA=A7=CE=
=F3=A3=A8=C0=FD=C8=E7=CE=F3=C9=BE=B3=FD=C1=CB=B1=ED=BB=F2=B1=ED=BF=D5=BC=E4=
=A3=A9=D4=EC=B3=C9=B5=C4=A1=A3=B2=BB=CD=EA=C8=AB=BD=E9=D6=CA=BB=D6=B8=B4=D6=
=BB=C4=DC=D5=EB=B6=D4=D5=FB=B8=F6=CA=FD=BE=DD=BF=E2=A3=AC=B6=F8=B2=BB=C4=DC=
=D5=EB=B6=D4=B5=A5=B6=C0=B5=C4=CA=FD=BE=DD=CE=C4=BC=FE=BB=F2=B1=ED=BF=D5=BC=
=E4=A1=A3=A3=A8=C8=E7=B9=FB=D3=C3=BB=A7=B2=BB=CF=A3=CD=FB=B6=D4=D5=FB=B8=F6=
=CA=FD=BE=DD=BF=E2=BD=F8=D0=D0=B2=BB=CD=EA=C8=AB=BD=E9=D6=CA=BB=D6=B8=B4=A3=
=AC=BF=C9=D2=D4=B6=D4=B5=A5=B6=C0=B5=C4=B1=ED=BF=D5=BC=E4=BD=F8=D0=D0=B1=ED=
=BF=D5=BC=E4=B0=B4=CA=B1=BC=E4=B5=E3=BB=D6=B8=B4=A3=A8tablespace=20
      point-in-time recovery=A3=A9=A3=A9=A1=A3<BR>=A1=A1</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">172</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">Use =
block media=20
      recovery when a small number of blocks in one or more files have =
been=20
      physically damaged. This usually happens due to hardware errors, =
such as a=20
      bad disk controller, or operating system I/O errors. <SPAN=20
      style=3D"BACKGROUND-COLOR: #ffff00">Block media recovery is used =
with=20
      individual data blocks, and the remainder of the database remains =
online=20
      and available during the recovery.</SPAN><BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft =
width=3D"48%">=B5=B1=D2=BB=B8=F6=BB=F2=B6=E0=B8=F6=CA=FD=BE=DD=CE=C4=BC=FE=
=D6=D0=B5=C4=C9=D9=C1=BF=CA=FD=BE=DD=BF=E9=A3=A8data=20
      =
block=A3=A9=B7=A2=C9=FA=CE=EF=C0=ED=CB=F0=BB=B5=CA=B1=BF=C9=D2=D4=B2=C9=C8=
=A1=CA=FD=BE=DD=BF=E9=BD=E9=D6=CA=BB=D6=B8=B4=A3=A8block media=20
      =
recovery=A3=A9=A1=A3=D5=E2=D1=F9=B5=C4=B4=ED=CE=F3=CD=A8=B3=A3=CA=C7=D3=C9=
=D3=B2=BC=FE=B9=CA=D5=CF=A3=A8=C0=FD=C8=E7=B4=C5=C5=CC=BF=D8=D6=C6=C6=F7=B9=
=CA=D5=CF=A3=A9=BB=F2=B2=D9=D7=F7=CF=B5=CD=B3 I/O=20
      =
=B4=ED=CE=F3=B5=BC=D6=C2=B5=C4=A1=A3=CA=FD=BE=DD=BF=E9=BD=E9=D6=CA=BB=D6=B8=
=B4=D6=BB=D5=EB=B6=D4=B8=F6=B1=F0=CA=FD=BE=DD=BF=E9=A3=AC=D4=DA=BB=D6=B8=B4=
=C6=DA=BC=E4=CA=FD=BE=DD=BF=E2=B5=C4=C6=E4=CB=FB=B2=BF=B7=D6=C8=D4=BF=C9=D2=
=D4=B1=A3=B3=D6=C1=AA=BB=FA=A3=A8online=A3=A9=A1=A3<BR>=A1=A1</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">173</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">
      <H2><A name=3De.15.3.2></A>When to Use Oracle Flashback</H2></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">
      <H2><A name=3Dc.15.3.2></A>15.3.2 =BA=CE=CA=B1=B2=C9=D3=C3 Oracle =
Flashback</H2></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">174</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"48%">Flashback Table is a=20
      push button solution to restore the contents of a table to a given =
point=20
      in time. An application on top of Flashback Query can achieve =
this, but=20
      with less efficiency.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">Flashback=20
      =
Table=A3=A8=BB=D8=C9=C1=B1=ED=A3=A9=BC=BC=CA=F5=CA=B9=D3=C3=BB=A7=C4=DC=B9=
=BB=CA=AE=B7=D6=B1=E3=BD=DD=B5=D8=BD=AB=B1=ED=CA=FD=BE=DD=BB=B9=D4=AD=B5=BD=
=C4=B3=B8=F6=D6=B8=B6=A8=B5=C4=CA=B1=BC=E4=B5=E3=A1=A3=BB=F9=D3=DA =
Flashback=20
      =
Query=A3=A8=BB=D8=C9=C1=B2=E9=D1=AF=A3=A9=B5=C4=D3=A6=D3=C3=D2=B2=BF=C9=D2=
=D4=CA=B5=CF=D6=CF=E0=CD=AC=B5=C4=B9=A6=C4=DC=A3=AC=B5=AB=D0=A7=C2=CA=C9=D4=
=B2=EE=A1=A3<BR>=A1=A1</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">175</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"48%">Flashback Database=20
      applies to the entire database. It requires configuration and =
resources,=20
      but it provides a fast alternative to performing incomplete =
database=20
      recovery.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">Flashback=20
      =
Database=A3=A8=BB=D8=C9=C1=CA=FD=BE=DD=BF=E2=A3=A9=B5=C4=D7=F7=D3=C3=B6=D4=
=CF=F3=CA=C7=D5=FB=B8=F6=CA=FD=BE=DD=BF=E2=A1=A3=CA=B9=D3=C3 Flashback =
Database=20
      =
=B9=A6=C4=DC=C7=B0=D3=C3=BB=A7=D0=E8=D2=AA=B6=D4=CF=B5=CD=B3=BD=F8=D0=D0=C5=
=E4=D6=C3=A3=AC=C7=D2=B4=CB=B9=A6=C4=DC=D0=E8=D2=AA=CF=FB=BA=C4=D2=BB=B6=A8=
=B5=C4=CF=B5=CD=B3=D7=CA=D4=B4=A1=A3=B5=AB Flashback Database=20
      =
=BF=C9=D2=D4=B4=FA=CC=E6=CA=FD=BE=DD=BF=E2=B2=BB=CD=EA=C8=AB=BB=D6=B8=B4=A3=
=A8incomplete database =
recovery=A3=A9=A3=AC=C7=D2=B8=FC=CE=AA=B1=E3=BD=DD=A1=A3<BR>=A1=A1</TD></=
TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">176</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"48%">Flashback Table uses=20
      information in the undo tablespace to restore the table. This =
provides=20
      significant benefits over media recovery in terms of ease of use,=20
      availability, and faster restoration.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">Flashback Table =
=B9=A6=C4=DC=C0=FB=D3=C3=BB=B9=D4=AD=B1=ED=BF=D5=BC=E4=A3=A8undo=20
      =
tablespace=A3=A9=C4=DA=B5=C4=D0=C5=CF=A2=C0=B4=BB=B9=D4=AD=B1=ED=CA=FD=BE=
=DD=A1=A3=D5=E2=D3=EB=BD=E9=D6=CA=BB=D6=B8=B4=A3=A8media=20
      =
recovery=A3=A9=CF=E0=B1=C8=B8=FC=CE=AA=BC=F2=B5=A5=A3=AC=BF=C9=D3=C3=D0=D4=
=A3=A8availability=A3=A9=B8=FC=B8=DF=A3=AC=C7=D2=BB=B9=D4=AD=CB=D9=B6=C8=B8=
=FC=BF=EC=A1=A3<BR>=A1=A1</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">177</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"48%">Flashback Database=20
      and Flashback Table differ in granularity, performance, and =
restrictions.=20
      For a <SPAN style=3D"BACKGROUND-COLOR: #ffff00">primary =
database</SPAN>,=20
      consider using Flashback Database rather than Flashback Table in =
the=20
      following situations:
      <UL>
        <LI style=3D"MARGIN-BOTTOM: 10px">There is a logical data =
corruption,=20
        particularly undo corruption.=20
        <LI style=3D"MARGIN-BOTTOM: 10px">A user error affected the =
whole=20
        database.=20
        <LI style=3D"MARGIN-BOTTOM: 10px">A user error affected a table =
or a small=20
        set of tables, but the impact of reverting this set of tables is =
not=20
        clear because of the logical relationships between tables.=20
        <LI style=3D"MARGIN-BOTTOM: 10px">A user error affected a table =
or a small=20
        set of tables, but using Flashback Table would fail because of =
its DDL=20
        restrictions.=20
        <LI style=3D"MARGIN-BOTTOM: 10px">Flashback Database works =
through all DDL=20
        operations, whereas Flashback Table does not. Also, because =
Flashback=20
        Database moves the entire database back in time, constraints are =
not an=20
        issue, whereas they are with Flashback Table. </LI></UL></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">Flashback Database =
=D3=EB Flashback Table=20
      =
=D4=DA=C1=A3=B6=C8=A3=A8granularity=A3=A9=A3=AC=D0=D4=C4=DC=A3=AC=BC=B0=CF=
=DE=D6=C6=CC=F5=BC=FE=C9=CF=B6=BC=D3=D0=CB=F9=B2=BB=CD=AC=A1=A3=B6=D4=D3=DA=
 primary =
database=A3=A8=D6=F7=CA=FD=BE=DD=BF=E2=A3=A9=A3=AC=D4=DA=D2=D4=CF=C2=C7=E9=
=BF=F6=CA=B1=D3=A6=BF=BC=C2=C7=B2=C9=D3=C3=20
      Flashback Database =B6=F8=B7=C7 Flashback Table=A3=BA
      <UL>
        <LI style=3D"MARGIN-BOTTOM: =
10px">=CF=B5=CD=B3=D6=D0=B4=E6=D4=DA=C2=DF=BC=AD=CA=FD=BE=DD=B4=ED=CE=F3=A3=
=A8logical data=20
        =
corruption=A3=A9=A3=AC=D3=C8=C6=E4=CA=C7=BB=B9=D4=AD=CA=FD=BE=DD=C2=DF=BC=
=AD=B4=ED=CE=F3=A3=A8undo corruption=A3=A9=A1=A3=20
        <LI style=3D"MARGIN-BOTTOM: =
10px">=D3=C3=BB=A7=CE=F3=B2=D9=D7=F7=D3=B0=CF=EC=C1=CB=D5=FB=B8=F6=CA=FD=BE=
=DD=BF=E2=A1=A3=20
        <LI=20
        style=3D"MARGIN-BOTTOM: =
10px">=D3=C3=BB=A7=CE=F3=B2=D9=D7=F7=D3=B0=CF=EC=C1=CB=D2=BB=B8=F6=B1=ED=BB=
=F2=D2=BB=CF=B5=C1=D0=B1=ED=A3=AC=B5=AB=CA=C7=D3=C9=D3=DA=B1=ED=BC=E4=B5=C4=
=C2=DF=BC=AD=B9=D8=CF=B5=BD=CF=B8=B4=D4=D3=A3=AC=D6=BB=BB=D6=B8=B4=B2=BF=B7=
=D6=B1=ED=B6=D4=D5=FB=B8=F6=CA=FD=BE=DD=BF=E2=B5=C4=D3=B0=CF=EC=C4=D1=D2=D4=
=C8=B7=B6=A8=A1=A3=20

        <LI style=3D"MARGIN-BOTTOM: =
10px">=D3=C3=BB=A7=CE=F3=B2=D9=D7=F7=D3=B0=CF=EC=C1=CB=D2=BB=B8=F6=B1=ED=BB=
=F2=D2=BB=CF=B5=C1=D0=B1=ED=A3=AC=B5=AB=CA=C7=D3=C3=BB=A7=B2=D9=D7=F7=D6=D0=
=B0=FC=BA=AC=CE=DE=B7=A8=CA=B9=D3=C3 Flashback=20
        Table =BB=D6=B8=B4=B5=C4=B2=D9=D7=F7=A1=A3=20
        <LI style=3D"MARGIN-BOTTOM: 10px">Flashback Database =
=B6=D4=CB=F9=D3=D0 DDL =BE=F9=C4=DC=BB=D6=B8=B4=A3=AC=B6=F8=20
        Flashback Table =B6=D4 DDL =
=B2=D9=D7=F7=B5=C4=BB=D6=B8=B4=D3=D0=CB=F9=CF=DE=D6=C6=A1=A3=B4=CB=CD=E2=A3=
=ACFlashback Database=20
        =
=C4=DC=B9=BB=BD=AB=D5=FB=B8=F6=CA=FD=BE=DD=BF=E2=BB=D6=B8=B4=B5=BD=B9=FD=C8=
=A5=B5=C4=C4=B3=B8=F6=CA=B1=BC=E4=B5=E3=A3=AC=BB=D6=B8=B4=BA=F3=CA=FD=BE=DD=
=BF=E2=C4=DA=B5=C4=D4=BC=CA=F8=A3=A8constraint=A3=A9=B2=BB=BB=E1=B1=BB=B4=
=F2=C6=C6=A3=AC=B6=F8=CD=A8=B9=FDFlashback Table=20
        =
=BD=F8=D0=D0=BB=D6=B8=B4=BA=F3=D4=F2=BF=C9=C4=DC=B3=F6=CF=D6=CE=A5=B7=B4=CA=
=FD=BE=DD=BF=E2=D4=BC=CA=F8=B5=C4=CE=CA=CC=E2=A1=A3 </LI></UL></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">178</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"48%">Flashback Table=20
      cannot be used on a <SPAN style=3D"BACKGROUND-COLOR: =
#ffff00">standby=20
      database</SPAN>.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">Flashback Table =
=B2=BB=C4=DC=D4=DA standby=20
      =
database=A3=A8=B1=B8=D3=C3=CA=FD=BE=DD=BF=E2=A3=A9=D6=D0=CA=B9=D3=C3=A1=A3=
<BR>=A1=A1</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">179</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">
      <BLOCKQUOTE><B>See Also:</B><BR><BR>"<A=20
        =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#e.15.2.3.1"=20
        target=3D_self>Overview of Oracle Flashback Database</A>" and =
"<A=20
        =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#e.15.2.3.2"=20
        target=3D_self>Overview of Oracle Flashback Table</A>" =
</BLOCKQUOTE></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">
      <BLOCKQUOTE><B>=C1=ED=BC=FB=A3=BA</B><BR><BR>=A1=B0<A=20
        =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#c.15.2.3.1"=20
        target=3D_self>Oracle Flashback Database =
=B8=C5=CA=F6</A>=A1=B1=D3=EB=A1=B0<A=20
        =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#c.15.2.3.2"=20
        target=3D_self>Oracle Flashback Table =
=B8=C5=CA=F6</A>=A1=B1</BLOCKQUOTE></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">180</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">
      <H2><A name=3De.15.3.3></A>When to Use CREATE TABLE AS SELECT=20
    Recovery</H2></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">
      <H2><A name=3Dc.15.3.3></A>15.3.3 =BA=CE=CA=B1=B2=C9=D3=C3 CREATE =
TABLE AS SELECT =BB=D6=B8=B4</H2></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">181</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">To do =
an out of=20
      place restore of the data, perform a CTAS (<FONT =
color=3D#0000ff>CREATE=20
      TABLE AS SELECT =A1=AD AS OF =A1=AD</FONT>) using the Flashback =
Query SQL "AS OF =A1=AD"=20
      clause. For example, to create a copy of the table as of a =
specific=20
      time:<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft =
width=3D"48%">=C8=E7=D0=E8=D4=DA=D0=C2=CE=BB=D6=C3=A3=A8out of =
place=A3=A9=BB=D6=B8=B4=D2=BB=B7=DD=CA=FD=BE=DD=B5=C4=B8=B1=B1=BE=A3=AC=BF=
=C9=D2=D4=CA=B9=D3=C3=20
      Flashback Query =B5=C4=A1=B0AS OF=A1=B1=D7=D3=BE=E4=D6=B4=D0=D0 =
CTAS=A3=A8<FONT color=3D#0000ff>CREATE TABLE AS=20
      SELECT =A1=AD AS OF =
=A1=AD</FONT>=A3=A9=B2=D9=D7=F7=A1=A3=C0=FD=C8=E7=A3=AC=B4=B4=BD=A8=B1=ED=
=D4=DA=C4=B3=B8=F6=CA=B1=BC=E4=B5=E3=B5=C4=B8=B1=B1=BE=A3=BA<BR>=A1=A1</T=
D></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">182</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">
      <BLOCKQUOTE>CREATE TABLE old_emp AS SELECT * <BR>FROM employees AS =
OF=20
        TIMESTAMP '2002-02-05 14:15:00'</BLOCKQUOTE></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">
      <BLOCKQUOTE>CREATE TABLE old_emp AS SELECT * <BR>FROM employees AS =
OF=20
        TIMESTAMP '2002-02-05 14:15:00'</BLOCKQUOTE></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">183</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">For =
out of place=20
      creation of the table, you only get data back. Constraints, =
indexes, and=20
      so on are not restored. This could take significantly more time =
and space=20
      than Flashback Table. However, Flashback Table only restores rows =
in=20
      blocks that were modified after the specified time, making it more =

      efficient.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft=20
      =
width=3D"48%">=D4=DA=D0=C2=CE=BB=D6=C3=BB=D6=B8=B4=B1=ED=CA=B1=A3=AC=D6=BB=
=C4=DC=B0=D1=CA=FD=BE=DD=BB=D6=B8=B4=A1=A3=D4=BC=CA=F8=A3=AC=CB=F7=D2=FD=A3=
=AC=BC=B0=C6=E4=CB=FB=CA=FD=BE=DD=BF=E2=B6=D4=CF=F3=B2=BB=BB=E1=B1=BB=BB=D6=
=B8=B4=A1=A3=C7=D2=C0=FB=D3=C3 Flashback Query=20
      =BD=F8=D0=D0=BB=D6=B8=B4=D3=EB=CA=B9=D3=C3 Flashback Table =
=CF=E0=B1=C8=BD=AB=CF=FB=BA=C4=B8=FC=B6=E0=B5=C4=CA=B1=BC=E4=BC=B0=BF=D5=BC=
=E4=A1=A3Flashback Table=20
      =
=D6=BB=BB=E1=BB=D6=B8=B4=CA=FD=BE=DD=BF=E9=C4=DA=D4=DA=D6=B8=B6=A8=CA=B1=BC=
=E4=BA=F3=B1=BB=D0=DE=B8=C4=B9=FD=B5=C4=CA=FD=BE=DD=A3=AC=D2=F2=B4=CB=D0=A7=
=C2=CA=B8=FC=B8=DF=A1=A3<BR>=A1=A1</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">184</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">
      <BLOCKQUOTE><B>See Also:</B><BR><BR><A=20
        =
href=3D"http://download-west.oracle.com/docs/cd/B19306_01/server.102/b142=
00/toc.htm">Oracle=20
        Database SQL Reference</A></BLOCKQUOTE></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">
      <BLOCKQUOTE><B>=C1=ED=BC=FB=A3=BA</B><BR><BR><A=20
        =
href=3D"http://download-west.oracle.com/docs/cd/B19306_01/server.102/b142=
00/toc.htm">Oracle=20
        Database SQL Reference</A></BLOCKQUOTE></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">185</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">
      <H2><A name=3De.15.3.4></A>When to Use Import/Export Utilities=20
    Recovery</H2></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">
      <H2><A name=3Dc.15.3.4></A>15.3.4 =BA=CE=CA=B1=B2=C9=D3=C3 =
Import/Export =B9=A4=BE=DF=BB=D6=B8=B4</H2></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">186</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">In =
contrast to=20
      physical backups, <A=20
      =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/a">logical=20
      backups</A> are exports of schema objects, like tables and stored=20
      procedures, into a binary file. Oracle utilities are used to move =
Oracle=20
      schema objects in and out of Oracle. <SPAN=20
      style=3D"BACKGROUND-COLOR: #ffff00">Export</SPAN>, or <SPAN=20
      style=3D"BACKGROUND-COLOR: #ffff00">Data Pump Export</SPAN>, =
writes data=20
      from an Oracle database to binary operating system files. <SPAN=20
      style=3D"BACKGROUND-COLOR: #ffff00">Import</SPAN>, or <SPAN=20
      style=3D"BACKGROUND-COLOR: #ffff00">Data Pump Import</SPAN>, reads =
export=20
      files and restores the corresponding data into an existing=20
    database.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft =
width=3D"48%">=D3=EB=CE=EF=C0=ED=B1=B8=B7=DD=A3=A8physical =
backup=A3=A9=B2=BB=CD=AC=A3=AC<A=20
      =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/a">=C2=DF=BC=AD=B1=B8=B7=DD</A>=A3=A8logical=20
      =
backup=A3=A9=C4=DC=B9=BB=BD=AB=B1=ED=A3=AC=B4=E6=B4=A2=B9=FD=B3=CC=B5=C8=B7=
=BD=B0=B8=B6=D4=CF=F3=A3=A8schema =
object=A3=A9=B5=BC=B3=F6=B5=BD=B6=FE=BD=F8=D6=C6=CE=C4=BC=FE=D6=D0=A1=A3=D3=
=C3=BB=A7=D0=E8=D2=AA=CA=B9=D3=C3 Oracle =
=B9=A4=BE=DF=B2=C5=C4=DC=CA=B5=CF=D6 Oracle=20
      =
=B7=BD=B0=B8=B6=D4=CF=F3=B5=C4=B5=BC=C8=EB=B5=BC=B3=F6=A1=A3Export=A3=A8=B5=
=BC=B3=F6=B9=A4=BE=DF=A3=A9=BB=F2 Data Pump =
Export=A3=A8=CA=FD=BE=DD=B1=C3=B5=BC=B3=F6=B9=A4=BE=DF=A3=A9=C4=DC=B9=BB=BD=
=AB Oracle=20
      =
=CA=FD=BE=DD=BF=E2=B6=D4=CF=F3=D0=B4=C8=EB=B6=FE=BD=F8=D6=C6=B5=C4=B2=D9=D7=
=F7=CF=B5=CD=B3=CE=C4=BC=FE=A1=A3Import=A3=A8=B5=BC=C8=EB=B9=A4=BE=DF=A3=A9=
=BB=F2 Data Pump=20
      =
Import=A3=A8=CA=FD=BE=DD=B1=C3=B5=BC=C8=EB=B9=A4=BE=DF=A3=A9=C4=DC=B9=BB=B6=
=C1=C8=A1=B5=BC=B3=F6=CE=C4=BC=FE=B2=A2=BD=AB=C6=E4=D6=D0=B5=C4=CA=FD=BE=DD=
=BB=D6=B8=B4=B5=BD=CA=FD=BE=DD=BF=E2=D6=D0=A1=A3<BR>=A1=A1</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">187</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"48%">Although import and=20
      export are designed for moving Oracle data, you can also use them =
as a=20
      supplemental method of protecting data in an Oracle database. You =
should=20
      not use Oracle import and export utilities as the sole method of =
backing=20
      up your data.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft =
width=3D"48%">=B5=BC=C8=EB=B5=BC=B3=F6=B9=A4=BE=DF=D6=F7=D2=AA=D3=C3=C0=B4=
=D4=DA Oracle=20
      =
=CA=FD=BE=DD=BF=E2=BC=E4=C7=A8=D2=C6=CA=FD=BE=DD=A3=AC=B5=AB=D3=C3=BB=A7=D2=
=B2=BF=C9=D2=D4=B0=D1=D5=E2=D0=A9=B9=A4=BE=DF=D7=F7=CE=AA=B1=A3=BB=A4 =
Oracle =
=CA=FD=BE=DD=BF=E2=CA=FD=BE=DD=B5=C4=B2=B9=B3=E4=B7=BD=B0=B8=A1=A3=D3=C3=BB=
=A7=B2=BB=D3=A6=D6=BB=B2=C9=D3=C3 Oracle=20
      =
=B5=BC=C8=EB=B5=BC=B3=F6=B9=A4=BE=DF=B6=D4=CA=FD=BE=DD=BF=E2=BD=F8=D0=D0=B1=
=B8=B7=DD=A1=A3<BR>=A1=A1</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">188</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">Oracle =
import and=20
      export utilities work similarly to CTAS, but they restore =
constraints,=20
      indexes, and so on. They effectively re-create the whole table if =
an=20
      export was performed earlier corresponding to the Flashback time.=20
      Flashback Table is more performance efficient than import/export=20
      utilities, because it restores only the subset of rows that got=20
      modified.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">Oracle =
=B5=BC=C8=EB=B5=BC=B3=F6=B9=A4=BE=DF=B9=A4=D7=F7=CA=B1=C0=E0=CB=C6 =
CTAS=A3=A8<FONT=20
      color=3D#0000ff>CREATE TABLE AS SELECT =A1=AD AS OF=20
      =
=A1=AD</FONT>=A3=A9=A3=AC=B4=CB=CD=E2=BB=B9=C4=DC=BB=D6=B8=B4=CA=FD=BE=DD=
=BF=E2=D4=BC=CA=F8=A3=AC=CB=F7=D2=FD=B5=C8=CA=FD=BE=DD=BF=E2=B6=D4=CF=F3=A1=
=A3=C8=E7=B9=FB=D3=C3=BB=A7=D4=DA=C6=DA=CD=FB=B5=C4=BB=D6=B8=B4=B5=E3=D6=AE=
=C7=B0=B5=BC=B3=F6=B9=FD=CA=FD=BE=DD=A3=AC=C4=C7=C3=B4=BE=CD=C4=DC=B9=BB=D4=
=DA=D0=E8=D2=AA=CA=B1=D1=B8=CB=D9=B5=D8=D6=D8=BD=A8=D5=FB=B8=F6=B1=ED=A1=A3=
Flashback=20
      =
Table=A3=A8=BB=D8=C9=C1=B1=ED=A3=A9=B1=C8=B5=BC=C8=EB=B5=BC=B3=F6=B9=A4=BE=
=DF=B5=C4=D0=A7=C2=CA=B8=FC=B8=DF=A3=AC=D2=F2=CE=AA Flashback Table=20
=D6=BB=BB=E1=BB=D6=B8=B4=CA=FD=BE=DD=BF=E9=C4=DA=D4=DA=D6=B8=B6=A8=CA=B1=BC=
=E4=BA=F3=B1=BB=D0=DE=B8=C4=B9=FD=B5=C4=CA=FD=BE=DD=A1=A3<BR>=A1=A1</TD><=
/TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">189</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">
      <BLOCKQUOTE><B>See Also:</B><BR><BR><A=20
        =
href=3D"http://download-west.oracle.com/docs/cd/B19306_01/server.102/b142=
15/toc.htm">Oracle=20
        Database Utilities</A> </BLOCKQUOTE></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">
      <BLOCKQUOTE><B>=C1=ED=BC=FB=A3=BA</B><BR><BR><A=20
        =
href=3D"http://download-west.oracle.com/docs/cd/B19306_01/server.102/b142=
15/toc.htm">Oracle=20
        Database Utilities</A> </BLOCKQUOTE></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">190</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">
      <H2><A name=3De.15.3.5></A>When to Use Tablespace Point-in-Time=20
    Recovery</H2></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">
      <H2><A name=3Dc.15.3.5></A>15.3.5 =
=BA=CE=CA=B1=B2=C9=D3=C3=B1=ED=BF=D5=BC=E4=B0=B4=CA=B1=BC=E4=B5=E3=BB=D6=B8=
=B4</H2></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">191</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">Use =
tablespace=20
      point-in-time recovery when one or more tablespaces have been =
logically=20
      damaged, and you do not want to do incomplete media recovery of =
the entire=20
      database. Tablespace point-in-time recovery is used with =
individual=20
      tablespaces.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft =
width=3D"48%">=B5=B1=D2=BB=B8=F6=BB=F2=B6=E0=B8=F6=B1=ED=BF=D5=BC=E4=B7=A2=
=C9=FA=C2=DF=BC=AD=CB=F0=BB=B5=A3=A8logical=20
      =
damage=A3=A9=A3=AC=C7=D2=D3=C3=BB=A7=B2=BB=CF=EB=B6=D4=D5=FB=B8=F6=CA=FD=BE=
=DD=BF=E2=BD=F8=D0=D0=B2=BB=CD=EA=C8=AB=BD=E9=D6=CA=BB=D6=B8=B4=A3=A8inco=
mplete media=20
      =
recovery=A3=A9=CA=B1=A3=AC=BF=C9=D2=D4=B2=C9=D3=C3=B1=ED=BF=D5=BC=E4=B0=B4=
=CA=B1=BC=E4=B5=E3=BB=D6=B8=B4=A3=A8tablespace point-in-time=20
      =
recovery=A3=A9=A1=A3=B1=ED=BF=D5=BC=E4=B0=B4=CA=B1=BC=E4=B5=E3=BB=D6=B8=B4=
=B5=C4=B6=D4=CF=F3=CA=C7=D5=FB=B8=F6=B1=ED=BF=D5=BC=E4=A1=A3<BR>=A1=A1</T=
D></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">192</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">
      <BLOCKQUOTE><B>See Also:</B><BR><BR>"<A=20
        =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#e.15.2.1.2.1"=20
        target=3D_self>Tablespace Point-in-Time Recovery</A>" =
</BLOCKQUOTE></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">
      <BLOCKQUOTE><B>=C1=ED=BC=FB=A3=BA</B><BR><BR>=A1=B0<A=20
        =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/15.Backup%20and%20Recovery.htm#c.15.2.1.2.1"=20
        =
target=3D_self>=B1=ED=BF=D5=BC=E4=B0=B4=CA=B1=BC=E4=B5=E3=BB=D6=B8=B4</A>=
=A1=B1 </BLOCKQUOTE></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">193</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">
      <H1><A name=3De.15.4></A><SPAN style=3D"FONT-SIZE: 20pt">Flash =
Recovery=20
      Area</SPAN></H1></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">
      <H1><A name=3Dc.15.4></A><SPAN style=3D"FONT-SIZE: 20pt">15.4 =
Flash Recovery=20
      Area</SPAN></H1></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">194</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">The =
<FONT=20
      color=3D#0000ff>flash recovery area</FONT> is an Oracle-managed =
directory,=20
      file system, or Automatic Storage Management disk group that =
provides a=20
      centralized disk location for backup and recovery files. Oracle =
creates=20
      archived logs in the flash recovery area. RMAN can store its =
backups in=20
      the flash recovery area, and it uses it when restoring files =
during media=20
      recovery. The flash recovery area also acts as a disk cache for=20
    tape.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">Flash Recovery =
Area=A3=A8=BB=D8=C9=C1=BB=D6=B8=B4=C7=F8=A3=A9=CA=C7=D2=BB=B8=F6 Oracle=20
      =
=B9=DC=C0=ED=B5=C4=C4=BF=C2=BC=A3=AC=CE=C4=BC=FE=CF=B5=CD=B3=A3=AC=BB=F2=D7=
=D4=B6=AF=B4=E6=B4=A2=B9=DC=C0=ED=B4=C5=C5=CC=D7=E9=A3=A8ASM disk =
group=A3=A9=A3=AC=C6=E4=D7=F7=D3=C3=CA=C7=CE=AA Oracle=20
      =
=B1=B8=B7=DD=D3=EB=BB=D6=B8=B4=CE=C4=BC=FE=CC=E1=B9=A9=D2=BB=B8=F6=BC=AF=D6=
=D0=B5=C4=B4=E6=B4=A2=CE=BB=D6=C3=A1=A3Oracle =
=D4=DA=C6=E4=D6=D0=B4=B4=BD=A8=B9=E9=B5=B5=D6=D8=D7=F6=C8=D5=D6=BE=A3=BBR=
MAN=20
      =
=D4=DA=C6=E4=D6=D0=B4=E6=B4=A2=B1=B8=B7=DD=CE=C4=BC=FE=A3=AC=B2=A2=D4=DA=D6=
=B4=D0=D0=BD=E9=D6=CA=BB=D6=B8=B4=CA=B1=CA=B9=D3=C3=C6=E4=D6=D0=B5=C4=B1=B8=
=B7=DD=A3=BBFlash Recovery Area =
=BB=B9=BF=C9=D2=D4=D7=F7=CE=AA=B4=C5=B4=F8=BB=FA=B5=C4=B4=C5=C5=CC=BB=BA=B4=
=E6=A1=A3<BR>=A1=A1</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">195</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">Oracle =
recovery=20
      components interact with the flash recovery area ensuring that the =

      database is completely recoverable using files in flash recovery =
area. All=20
      files necessary to recover the database following a media failure =
are part=20
      of flash recovery area.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">Oracle =
=BB=D6=B8=B4=D7=E9=BC=FE=C4=DC=B9=BB=D3=EB Flash Recovery Area=20
      =BD=BB=BB=A5=A3=AC=B4=D3=B6=F8=C8=B7=B1=A3 Flash Recovery Area =
=D6=D0=B5=C4=CE=C4=BC=FE=C2=FA=D7=E3=CA=FD=BE=DD=BF=E2=BB=D6=B8=B4=B5=C4=D2=
=AA=C7=F3=A1=A3=BD=E9=D6=CA=B9=CA=D5=CF=A3=A8media=20
      =
failure=A3=A9=BA=F3=BB=D6=B8=B4=CA=FD=BE=DD=BF=E2=CB=F9=D0=E8=B5=C4=CB=F9=
=D3=D0=CE=C4=BC=FE=B6=BC=B1=A3=B4=E6=D4=DA Flash Recovery Area =
=D6=D0=A1=A3<BR>=A1=A1</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">196</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"48%">Following is a list=20
      of recovery-related files in flash recovery area:
      <UL>
        <LI style=3D"MARGIN-BOTTOM: 10px">Current control file=20
        <LI style=3D"MARGIN-BOTTOM: 10px">Online logs=20
        <LI style=3D"MARGIN-BOTTOM: 10px">Archived logs=20
        <LI style=3D"MARGIN-BOTTOM: 10px">Flashback logs=20
        <LI style=3D"MARGIN-BOTTOM: 10px">Control file autobackups=20
        <LI style=3D"MARGIN-BOTTOM: 10px">Control file copies=20
        <LI style=3D"MARGIN-BOTTOM: 10px">Datafile copies=20
        <LI style=3D"MARGIN-BOTTOM: 10px">Backup pieces </LI></UL></TD>
    <TD vAlign=3Dtop align=3Dleft =
width=3D"48%">=D2=D4=CF=C2=C1=D0=B3=F6=C1=CB Flash Recovery Area =
=D6=D0=D3=EB=BB=D6=B8=B4=CF=E0=B9=D8=B5=C4=CE=C4=BC=FE=A3=BA
      <UL>
        <LI style=3D"MARGIN-BOTTOM: =
10px">=B5=B1=C7=B0=B5=C4=BF=D8=D6=C6=CE=C4=BC=FE=A3=A8control file=A3=A9 =

        <LI style=3D"MARGIN-BOTTOM: =
10px">=C1=AA=BB=FA=D6=D8=D7=F6=C8=D5=D6=BE=A3=A8online log=A3=A9=20
        <LI style=3D"MARGIN-BOTTOM: =
10px">=B9=E9=B5=B5=D6=D8=D7=F6=C8=D5=D6=BE=A3=A8archived log=A3=A9=20
        <LI style=3D"MARGIN-BOTTOM: =
10px">=BB=D8=C9=C1=C8=D5=D6=BE=A3=A8flashback log=A3=A9=20
        <LI style=3D"MARGIN-BOTTOM: =
10px">=BF=D8=D6=C6=CE=C4=BC=FE=B5=C4=D7=D4=B6=AF=B1=B8=B7=DD=A3=A8control=
 file autobackup=A3=A9=20
        <LI style=3D"MARGIN-BOTTOM: =
10px">=BF=D8=D6=C6=CE=C4=BC=FE=B8=B1=B1=BE=A3=A8control file copy=A3=A9=20
        <LI style=3D"MARGIN-BOTTOM: =
10px">=CA=FD=BE=DD=CE=C4=BC=FE=B8=B1=B1=BE=A3=A8datafile copy=A3=A9=20
        <LI style=3D"MARGIN-BOTTOM: =
10px">=B1=B8=B7=DD=B3=C9=D4=B1=A3=A8backup piece=A3=A9 =
</LI></UL></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">197</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">
      <H2><A name=3De.15.4.1></A>Flash Recovery Area Disk =
Limit</H2></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">
      <H2><A name=3Dc.15.4.1></A>15.4.1 Flash Recovery Area =
=B5=C4=B4=C5=C5=CC=CF=DE=B6=EE</H2></TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">198</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">Oracle =
lets you=20
      define a disk limit, which is the amount of space that Oracle can =
use in=20
      the flash recovery area. A disk limit lets you use the remaining =
disk=20
      space for other purposes and not to dedicate a complete disk for =
the flash=20
      recovery area. It does not include any overhead that is not known =
to=20
      Oracle. For example, the flash recovery area disk limit does not =
include=20
      the extra size of a file system that is compressed, mirrored, or =
some=20
      other redundancy mechanism.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft =
width=3D"48%">=D3=C3=BB=A7=BF=C9=D2=D4=CE=AA Flash Recovery Area=20
      =B6=A8=D2=E5=D2=BB=B8=F6=B4=C5=C5=CC=CF=DE=B6=EE=A3=A8disk =
limit=A3=A9=A3=AC=BC=B4 Oracle =BF=C9=D3=C3=B5=C4 Flash Recovery Area =
=BF=D5=BC=E4=C8=DD=C1=BF=A1=A3=B6=A8=D2=E5=C1=CB=B4=CB=CF=DE=B6=EE=BA=F3=A3=
=ACFlash=20
      Recovery Area =
=B2=BB=BB=E1=D5=BC=D3=C3=C8=AB=B2=BF=B4=C5=C5=CC=BF=D5=BC=E4=A3=AC=D3=C3=BB=
=A7=BF=C9=D2=D4=CA=B9=D3=C3=B4=C5=C5=CC=C4=DA=CA=A3=D3=E0=B5=C4=BF=D5=BC=E4=
=A1=A3=D0=E8=D2=AA=D7=A2=D2=E2=B5=C4=CA=C7=A3=AC=B4=C5=C5=CC=CF=DE=B6=EE=B2=
=BB=B0=FC=BA=AC=B7=C7 Oracle=20
      =
=B9=DC=C0=ED=B5=C4=B4=E6=B4=A2=BF=AA=CF=FA=A1=A3=C0=FD=C8=E7=A3=AC=C6=E4=D6=
=D0=B2=BB=B0=FC=C0=A8=CE=C4=BC=FE=CF=B5=CD=B3=BD=F8=D0=D0=D1=B9=CB=F5=A3=AC=
=BE=B5=CF=F1=A3=AC=BB=F2=C6=E4=CB=FB=C8=DF=D3=E0=BB=FA=D6=C6=CB=F9=D0=E8=B5=
=C4=B6=EE=CD=E2=B4=E6=B4=A2=BF=D5=BC=E4=A1=A3<BR>=A1=A1</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">199</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">Oracle =
and RMAN=20
      create files in the flash recovery area until the space used =
reaches the=20
      flash recovery area disk limit. Then, Oracle deletes the minimum =
set of=20
      existing files from the flash recovery area that are obsolete, =
redundant=20
      copies, or backed up to <SPAN style=3D"BACKGROUND-COLOR: =
#ffff00">tertiary=20
      storage</SPAN>. Oracle warns the user when available disk space is =
less=20
      than 15%, but it continues to fill the disk to 100% of the flash =
recovery=20
      area disk limit.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">Oracle =BC=B0 RMAN =
=C4=DC=B9=BB=D4=DA Flash Recovery=20
      Area =
=D6=D0=B4=B4=BD=A8=CE=C4=BC=FE=A3=AC=D6=B1=D6=C1=D2=D1=D3=C3=BF=D5=BC=E4=B4=
=EF=B5=BD=B4=C5=C5=CC=CF=DE=B6=EE=A1=A3=B4=CB=CA=B1=A3=ACOracle =
=BD=AB=D7=D4=B6=AF=B5=D8=C9=BE=B3=FD Flash Recovery Area=20
      =
=D6=D0=B9=FD=CA=B1=BB=F2=C8=DF=D3=E0=CE=C4=BC=FE=A3=AC=BB=F2=BD=AB=D5=E2=D0=
=A9=CE=C4=BC=FE=B1=B8=B7=DD=B5=BD=C8=FD=BC=B6=B4=E6=B4=A2=A3=A8tertiary =
storage=A3=A9=D6=D0=A1=A3Oracle =
=D4=DA=BF=C9=D3=C3=B5=C4=B4=C5=C5=CC=BF=D5=BC=E4=C9=D9=D3=DA 15%=20
      =
=CA=B1=BB=E1=CF=F2=D3=C3=BB=A7=B7=A2=B3=F6=B8=E6=BE=AF=A3=AC=B5=AB=C8=D4=BB=
=E1=BC=CC=D0=F8=CA=B9=D3=C3 Flash Recovery =
Area=A3=AC=D6=B1=D6=C1=D2=D1=D3=C3=BF=D5=BC=E4=B4=EF=B5=BD=B4=C5=C5=CC=CF=
=DE=B6=EE=B5=C4 100%=A1=A3<BR>=A1=A1</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">200</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">The =
bigger the flash=20
      recovery area, the more useful it becomes. The recommended disk =
limit is=20
      the sum of the database size, the size of incremental backups, and =
the=20
      size of all archive logs that have not been copied to =
tape.<BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">Flash Recovery Area=20
      =
=D4=BD=B4=F3=A3=AC=C6=E4=B7=A2=BB=D3=B5=C4=D7=F7=D3=C3=D4=BD=B4=F3=A1=A3O=
racle =
=BD=A8=D2=E9=B4=C5=C5=CC=CF=DE=B6=EE=CE=AA=CA=FD=BE=DD=BF=E2=C8=DD=C1=BF=A3=
=AC=D4=F6=C1=BF=B1=B8=B7=DD=C8=DD=C1=BF=A3=AC=BC=B0=BB=B9=C3=BB=D3=D0=B8=B4=
=D6=C6=B5=BD=B4=C5=B4=F8=B5=C4=C8=AB=B2=BF=B9=E9=B5=B5=D6=D8=D7=F6=C8=D5=D6=
=BE=C8=DD=C1=BF=D6=AE=BA=CD=A1=A3<BR>=A1=A1</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">201</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%"><SPAN=20
      style=3D"BACKGROUND-COLOR: #ffff00">If the flash recovery area is =
big enough=20
      to keep a copy of the tablespaces, then those tablespaces do not =
need to=20
      access tertiary storage.</SPAN> The minimum size of the flash =
recovery=20
      area should be at least large enough to contain archive logs that =
have not=20
      been copied to tape. <SPAN style=3D"BACKGROUND-COLOR: #ffff00">For =
example,=20
      if an ASM disk group of size 100 GB is used with normal redundancy =
for the=20
      flash recovery area, then the flash recovery area disk limit must =
be set=20
      to 50 GB.</SPAN><BR>=A1=A1</TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">=C8=E7=B9=FB Flash =
Recovery Area=20
      =
=B5=C4=C8=DD=C1=BF=D7=E3=B9=BB=C8=DD=C4=C9=CB=F9=D3=D0=B1=ED=BF=D5=BC=E4=B5=
=C4=B8=B1=B1=BE=A3=AC=C4=C7=C3=B4=D5=E2=D0=A9=B1=ED=BF=D5=BC=E4=BE=CD=CE=DE=
=D0=E8=B1=B8=B7=DD=B5=BD=C8=FD=BC=B6=B4=E6=B4=A2=D6=D0=A1=A3Flash =
Recovery Area=20
      =
=B5=C4=D7=EE=D0=A1=C8=DD=C1=BF=D6=C1=C9=D9=D3=A6=C4=DC=C8=DD=C4=C9=BB=B9=C3=
=BB=D3=D0=B8=B4=D6=C6=B5=BD=B4=C5=B4=F8=B5=C4=C8=AB=B2=BF=B9=E9=B5=B5=D6=D8=
=D7=F6=C8=D5=D6=BE=A1=A3=C0=FD=C8=E7=A3=ACFlash Recovery Area =
=CA=B9=D3=C3=D2=BB=B8=F6=C8=DD=C1=BF=CE=AA 100 GB=20
      =C7=D2=B2=C9=D3=C3=D5=FD=B3=A3=C8=DF=D3=E0=A3=A8normal =
redundancy=A3=A9=B5=C4 ASM =B4=C5=C5=CC=D7=E9=A3=A8disk =
group=A3=A9=A3=AC=C4=C7=C3=B4=C6=E4=B4=C5=C5=CC=CF=DE=B6=EE=D3=A6=C9=E8=CE=
=AA 50=20
  GB=A1=A3<BR>=A1=A1</TD></TR>
  <TR>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft =
width=3D"4%">202</TD>
    <TD=20
    style=3D"BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: 1px solid; =
BORDER-LEFT-WIDTH: 1px; BORDER-BOTTOM-WIDTH: 1px"=20
    vAlign=3Dtop borderColor=3D#000000 align=3Dleft width=3D"48%">
      <BLOCKQUOTE>
        <P><B>See Also:</B></P>
        <UL>
          <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
          =
href=3D"http://download-west.oracle.com/docs/cd/B19306_01/backup.102/b141=
91/toc.htm">Oracle=20
          Database Backup and Recovery Advanced User's Guide</A> for the =
rules=20
          that define the priority of file deletion, as well as other=20
          information about the flash recovery area=20
          <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
          =
href=3D"http://download-west.oracle.com/docs/cd/B19306_01/server.102/b142=
31/toc.htm">Oracle=20
          Database Administrator's Guide</A> for information about how =
to set up=20
          and administer the flash recovery area =
</LI></UL></BLOCKQUOTE></TD>
    <TD vAlign=3Dtop align=3Dleft width=3D"48%">
      <BLOCKQUOTE>
        <P><B>=C1=ED=BC=FB=A3=BA</B></P>
        <UL>
          <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
          =
href=3D"http://download-west.oracle.com/docs/cd/B19306_01/backup.102/b141=
91/toc.htm">Oracle=20
          Database Backup and Recovery Advanced User's Guide</A> =
=C1=CB=BD=E2 Flash=20
          Recovery Area =
=D6=D0=C9=BE=B3=FD=CE=C4=BC=FE=B5=C4=D3=C5=CF=C8=BC=B6=B9=E6=D4=F2=A3=AC=BC=
=B0=C6=E4=CB=FB=CF=E0=B9=D8=D0=C5=CF=A2=20
          <LI style=3D"MARGIN-BOTTOM: 10px"><A=20
          =
href=3D"http://download-west.oracle.com/docs/cd/B19306_01/server.102/b142=
31/toc.htm">Oracle=20
          Database Administrator's Guide</A> =
=C1=CB=BD=E2=C8=E7=BA=CE=C5=E4=D6=C3=D3=EB=B9=DC=C0=ED Flash Recovery =
Area=20
        </LI></UL></BLOCKQUOTE></TD></TR></TBODY></TABLE><BR><B>A =
=B7=AD=D2=EB=B2=BB=C8=B7=B6=A8=B5=C4=B4=CA=BB=E3=A3=A8=B8=F1=CA=BD=A3=BA<=
/B><SPAN=20
style=3D"BACKGROUND-COLOR: #ffff00">=BB=C6=C9=AB=B1=B3=BE=B0</SPAN><B> =
=A3=A9 =A1=A1</B><BR>
<HR>

<TABLE id=3Dtable2 width=3D"100%" border=3D0>
  <TBODY>
  <TR>
    <TD vAlign=3Dtop =
align=3Dleft>=A1=A1</TD></TR></TBODY></TABLE><B><BR>B=20
=B7=AD=D2=EB=B2=BB=C8=B7=B6=A8=B5=C4Oracle/=CA=FD=BE=DD=BF=E2=B4=CA=BB=E3=
=A3=A8=B8=F1=CA=BD=A3=BA</B><SPAN style=3D"BACKGROUND-COLOR: =
#ffff00">=BB=C6=C9=AB=B1=B3=BE=B0</SPAN><B>=20
=A3=A9</B><BR>
<HR>

<TABLE id=3Dtable4 width=3D"100%" border=3D0>
  <TBODY>
  <TR>
    <TD vAlign=3Dtop align=3Dleft>[001] recovery =
=BB=D6=B8=B4/=D0=DE=B8=B4=A3=BB=BB=D6=B8=B4 =3D =B8=B4=D4=AD + =
=D0=DE=B8=B4=A3=BF<BR>[001]=20
      restoring/restore =B8=B4=D4=AD<BR>[011] Whole Database and Partial =
Database=20
      Backups<BR>[037] implications<BR>[038] valid configuration=20
      options<BR>[059] backup set<BR>[061] backup piece<BR>[063] =
fractured=20
      block<BR>[<FONT color=3D#0000ff>071</FONT>] Oracle =
Flashback<BR>[076] crash=20
      recovery<BR>[087] point-in-time recovery<BR>[<FONT=20
      color=3D#0000ff>090</FONT>] Flashback Database<BR>[098] Recovery=20
      Manager<BR>[103] no recovery required<BR>[110] fixed =
view<BR>[<FONT=20
      color=3D#0000ff>120</FONT>] Flashback<BR>[124] Oracle Flashback=20
      Database<BR>[125] flash recovery area<BR>[127] Flashback =
log<BR>[<FONT=20
      color=3D#0000ff>131</FONT>] Oracle Flashback Table<BR>[<FONT=20
      color=3D#0000ff>133</FONT>] Flashback Version query<BR>[<FONT=20
      color=3D#0000ff>133</FONT>] Flashback Transaction Query<BR>[135] =
row=20
      movement<BR>[<FONT color=3D#0000ff>144</FONT>] cache =
recovery<BR>[<FONT=20
      color=3D#0000ff>144</FONT>] transaction recovery<BR>[147] cache=20
      recovery<BR>[161] redo thread<BR>[<FONT =
color=3D#0000ff>177</FONT>] primary=20
      database<BR>[<FONT color=3D#0000ff>177</FONT>] standby =
database<BR>[<FONT=20
      color=3D#0000ff>186</FONT>] Export<BR>[<FONT =
color=3D#0000ff>186</FONT>] Data=20
      Pump Export<BR>[<FONT color=3D#0000ff>186</FONT>] Import<BR>[<FONT =

      color=3D#0000ff>186</FONT>] Data Pump Import<BR>[<FONT=20
      color=3D#0000ff>194</FONT>] flash recovery area<BR>[199] tertiary=20
  storage</TD></TR></TBODY></TABLE><B><BR>C =
=B7=AD=D2=EB=B2=BB=C8=B7=B6=A8=B5=C4=BE=E4=D7=D3=A3=A8=B8=F1=CA=BD=A3=BA<=
/B><SPAN=20
style=3D"BACKGROUND-COLOR: #ffff00">=BB=C6=C9=AB=B1=B3=BE=B0</SPAN><B> =
=A3=A9</B><BR>
<HR>

<TABLE id=3Dtable5 width=3D"100%" border=3D0>
  <TBODY>
  <TR>
    <TD vAlign=3Dtop align=3Dleft>[026] Oracle strongly recommends that =
you do not=20
      make inconsistent, closed database backups in <FONT=20
      color=3D#0000ff>NOARCHIVELOG</FONT> mode.<BR>[031] After open or=20
      inconsistent closed backups, Oracle recommends backing up all =
archived=20
      logs produced during the backup, and then backing up the control =
file=20
      after the backup completes. If you do not have all archived redo =
logs=20
      produced during the backup, then you cannot recover the backup =
because you=20
      do not have all the redo records necessary to make it =
consistent.<BR>[037]=20
      Before performing whole database backups, however, be aware of the =

      implications of backing up in <FONT =
color=3D#0000ff>ARCHIVELOG</FONT> and=20
      <FONT color=3D#0000ff>NOARCHIVELOG</FONT> modes.<BR>[051] The RMAN =
<FONT=20
      color=3D#0000ff>BACKUP CURRENT CONTROLFILE</FONT> command makes a =
binary=20
      backup of the control file, as either a backup set or an image=20
      copy.<BR>[051] Trace file backups have one major disadvantage: =
they=20
      contain no records of archived redo logs, and RMAN backups and =
copies. For=20
      this reason, binary backups are preferable.<BR>[069] After the =
necessary=20
      files are restored, media recovery must be initiated by the user. =
Media=20
      recovery involves various operations to restore, roll forward, and =
roll=20
      back a backup of database files.<BR>[088] The <FONT=20
      color=3D#0000ff>RESETLOGS</FONT> operation creates a new =
incarnation of the=20
      database=A1=AAin other words, a database with a new stream of log =
sequence=20
      numbers starting with log sequence 1.<BR>[093] in cases where =
there are=20
      multiple independent schemas in separate tablespaces of one =
physical=20
      database<BR>[117] Restore any necessary archived redo log =
files.<BR>[128]=20
      The before images in the Flashback logs are only used to restore =
the=20
      database to a point in the past, and forward recovery is used to =
bring the=20
      database to a consistent state at some time in the past.<BR>[131]=20
      Flashback Table does not address physical corruption; for example, =
bad=20
      disks or data segment and index inconsistencies.<BR>[158] Oracle =
can roll=20
      back multiple transactions simultaneously as needed.<BR>[158] =
Instead of=20
      waiting for SMON to roll back terminated transactions, new =
transactions=20
      can recover blocking transactions themselves to get the row locks =
they=20
      need.<BR>[161] Oracle recovers the <A=20
      =
href=3D"file:///D:/Zhengwu/Oracle.Concept.10g.R2.Translation.Programe/Rel=
ease.Version/a">redo=20
      thread</A>s of the terminated instances together.<BR>[172] Block =
media=20
      recovery is used with individual data blocks, and the remainder of =
the=20
      database remains online and available during the =
recovery.<BR>[201] If the=20
      flash recovery area is big enough to keep a copy of the =
tablespaces, then=20
      those tablespaces do not need to access tertiary storage.<BR>[201] =
For=20
      example, if an ASM disk group of size 100 GB is used with normal=20
      redundancy for the flash recovery area, then the flash recovery =
area disk=20
      limit must be set to 50 GB.</TD></TR></TBODY></TABLE><B><BR>D=20
=D7=A2=CA=CD=D0=D4=B5=C4=CE=C4=D7=D6=A3=A8=B8=F1=CA=BD=A3=BA</B>[<FONT =
color=3D#008000>=C2=CC=C9=AB</FONT>]<B>=A3=A9</B><BR>
<HR>

<TABLE id=3Dtable6 width=3D"100%" border=3D0>
  <TBODY>
  <TR>
    <TD vAlign=3Dtop =
align=3Dleft>=A1=A1</TD></TR></TBODY></TABLE><B><BR>E =
=CE=B4=CD=EA=B3=C9=B5=C4=C1=B4=BD=D3</B><BR>
<HR>

<TABLE id=3Dtable7 width=3D"100%" border=3D0>
  <TBODY>
  <TR>
    <TD vAlign=3Dtop align=3Dleft>[008] Recovery Manager (RMAN)<BR>[014] =
system=20
      change number (SCN)<BR>[018] read-only database<BR>[019]=20
      checkpoint<BR>[024] online backup<BR>[029] online backup<BR>[036] =
whole=20
      database backup<BR>[041] consistent backup<BR>[041] inconsistent=20
      backup<BR>[122] Overview of Oracle Flashback Features<BR>[146] =
online redo=20
      log<BR>[147] cache recovery<BR>[147] rolling forward<BR>[151] =
manual undo=20
      management mode<BR>[151] automatic undo management mode<BR>[151] =
rollback=20
      segment<BR>[153] rolling back<BR>[153] transaction =
recovery<BR>[161] redo=20
      thread<BR>[186] logical backups</TD></TR></TBODY></TABLE><B><BR>F=20
Oracle=D1=A7=CF=B0=CE=CA=CC=E2=A3=A8=B8=F1=CA=BD=A3=BA</B><SPAN =
style=3D"BACKGROUND-COLOR: =
#ffff00">=BB=C6=C9=AB=B1=B3=BE=B0</SPAN><B>=A3=A9</B>
<HR>
=20
<TABLE id=3Dtable8 width=3D"100%" border=3D0>
  <TBODY>
  <TR>
    <TD vAlign=3Dtop align=3Dleft>1=A1=A2closed database =
=CA=C7=B9=D8=B1=D5=B5=C4=CA=FD=BE=DD=BF=E2=C3=B4=A3=BF=B6=D4=B9=D8=B1=D5=B5=
=C4=CA=FD=BE=DD=BF=E2=BD=F8=D0=D0=B1=B8=B7=DD=D4=F5=C3=B4=BB=E1=CA=C7=20
      inconsistent =B5=C4=A3=BF<BR>[026] Oracle strongly recommends that =
you do not make=20
      inconsistent, closed database backups in <FONT=20
      color=3D#0000ff>NOARCHIVELOG</FONT> mode.<BR>=B4=F0=A3=BAclosed =
=CA=FD=BE=DD=BF=E2=BF=C9=C4=DC=CA=C7 inconsistent=20
      =B5=C4=A3=AC=B4=E6=D4=DA=C1=BD=D6=D6=C7=E9=BF=F6 SHUTDOWN ABORT or =
the instance terminated=20
      abnormally=A1=A3<BR><BR>2=A1=A2offline-normal =
=CA=C7=CA=B2=C3=B4=D2=E2=CB=BC=A3=BF<BR>[046] The datafiles are read=20
      only or offline-normal.<BR><BR>3=A1=A2backup set =BA=CD image copy =

      =
=CA=C7=CA=B2=C3=B4=A3=BF=D5=E2=BE=E4=C8=E7=BA=CE=B7=AD=D2=EB=D7=BC=C8=B7=A3=
=BF<BR>[051] The RMAN <FONT color=3D#0000ff>BACKUP CURRENT=20
      CONTROLFILE</FONT> command makes a binary backup of the control =
file, as=20
      either a backup set or an image =
copy.<BR><BR>4=A1=A2=B8=F9=BE=DD=CA=B2=C3=B4=C5=D0=B6=CF block =
=CA=C7=B7=F1=CE=AA=20
      fractured=A3=BF<BR>[064] The server reads each block and =
determines whether the=20
      block is fractured. If the block is fractured, then Oracle =
re-reads the=20
      block until it gets a consistent picture of the =
data.<BR><BR>5=A1=A2=C8=E7=BA=CE=BD=F8=D0=D0 Block=20
      media recovery=A3=BF<BR>[080] Block media recovery is a more =
specialized=20
      operation that you use when just a few blocks in one or more files =
have=20
      been corrupted.<BR><BR>6=A1=A2Flashback Version Query =BA=CD =
Flashback Transaction=20
      Query =
=C8=E7=BA=CE=CA=B9=D3=C3=A3=AC=D0=A7=B9=FB=C8=E7=BA=CE=A3=BF<BR>[133]<BR>=
<BR>7=A1=A2=CA=B2=C3=B4=CA=C7 row=20
      movement=A3=BF<BR>[135]<BR><BR>8=A1=A2commit =BA=CD redo=20
      log=A3=ACdbwr=A3=ACcheckpoint....=B5=C4=B9=D8=CF=B5=A3=BFcommit =
=B6=D4=CA=FD=BE=DD=BF=E2=D7=F6=C1=CB=CA=B2=C3=B4=A3=BF<BR>[143] =
<BR><BR>9=A1=A2remainder=20
      of the database =
=CA=C7=CA=B2=C3=B4=A3=BF=CE=DE=D0=E8=BB=D6=B8=B4=B5=C4=CA=FD=BE=DD=CE=C4=BC=
=FE=A3=BF=BB=B9=CA=C7=B1=ED=BF=D5=BC=E4=A3=BF<BR>[172] Block media =
recovery is used=20
      with individual data blocks, and the remainder of the database =
remains=20
      online and available during the=20
recovery.</TD></TR></TBODY></TABLE><B><BR></B>translator: <A=20
href=3D"mailto:zw1840@hotmail.com">zw1840@hotmail.com</A> </BODY></HTML>

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