知识大全实例讲解Oracle9i数据坏块的处理

Posted 2022-07-15 命令

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　　笔者在一台生产用测试库上SELECT一个表时出现ORA 一个块损坏以前学习过块损坏怎么处理到还真没遇到过今天总算让我遇到了还是一台生产用测试库就不用很紧张了

　　数据库版本是 Oracle i的RMAN有一个blockrecover命令可以在线修复坏块以下就是使用RMAN修复坏块的过程

　　SQL> conn owi/owiConnected SQL> select * from dpa_history;select * from dpa_history*ERROR at line :ORA : ORACLE data block corrupted (file # block # )ORA : data file : /d /app/oracle/oradata/dpa/dpa dbf

　　报ORA 数据块损坏以下使用RMAN命令查询是否可以使用blockrecover命令恢复以及怎样恢复

　　使用rman登录catalog数据库

　　[ora @rmanserver ~]$ rman target sys/oracle@dpa catalog rman/rman

　　Recovery Manager: Release Production

　　connected to target database: DPA (DBID= )connected to recovery catalog database

　　查找最近datafile 的全备份今天下午刚做了一次RMAN的全备份

　　RMAN> list backup of datafile ;

　　List of Backup Sets===================

　　BS Key Type LV Size Device Type Elapsed Time Completion Time Full K DISK : : MAR BP Key: Status: AVAILABLE Tag: TAG T Piece Name: /d /fullbackup/ _data_ _ List of Datafiles in backup set File LV Type Ckp SCN Ckp Time Name Full MAR /d /app/oracle/oradata/dpa/dpa dbf

　　查找SCN 以后的archivelog是否有备份

　　RMAN> list backup of archivelog scn from List of Backup Sets===================BS Key Size Device Type Elapsed Time Completion Time K DISK : : MAR BP Key: Status: AVAILABLE Tag: TAG T Piece Name: /d /fullbackup/ _arch_ List of Archived Logs in backup set Thrd Seq Low SCN Low Time Next SCN Next Time MAR MAR MAR MAR

　　查找sequence 以后的archivelog是否有备份

　　RMAN> list copy of archivelog from sequence ;

　　List of Archived Log CopiesKey Thrd Seq S Low Time Name A MAR /d /arch/ _ dbf A MAR /d /arch/ _ dbf

　　查询online archive log

　　SQL> select sequence# members archived status from v$log;

　　SEQUENCE# MEMBERS ARC STATUS NO CURRENT YES INACTIVE YES INACTIVE

　　从以上查询中可以看出datafile 有一次最近的全备份有全备份以来的所有archivelog online redo log下面开始blockreocver 其实命令很简单

　　RMAN> blockrecover datafile block ;

　　Starting blockrecover at MAR allocated channel: ORA_DISK_ channel ORA_DISK_ : sid= devtype=DISK

　　channel ORA_DISK_ : restoring block(s)channel ORA_DISK_ : specifying block(s) to restore from backup setrestoring blocks of datafile channel ORA_DISK_ : restored block(s) from backup piece piece handle=/d /fullbackup/ _data_ _ tag=TAG T params=NULLchannel ORA_DISK_ : block restore plete

　　starting media recovery

　　archive log thread sequence is already on disk as file /d /arch/ _ dbfarchive log thread sequence is already on disk as file /d /arch/ _ dbfchannel ORA_DISK_ : starting archive log restore to default destinationchannel ORA_DISK_ : restoring archive logarchive log thread= sequence= channel ORA_DISK_ : restoring archive logarchive log thread= sequence= channel ORA_DISK_ : restored backup piece piece handle=/d /fullbackup/ _arch_ tag=TAG T params=NULLchannel ORA_DISK_ : restore pletemedia recovery pleteFinished blockrecover at MAR

再SELECT一下表DPA_HISTORY

　　SQL> select * from dpa_history;

cha138/Article/program/Oracle/201311/18869

知识大全 实例讲解Oracle9i数据坏块的处理

知识大全实例讲解Oracle9i数据坏块的处理