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oracle redo损坏的处理

oracle redo损坏的处理
 
如果光是INACTIVE状态的redo损坏,有三种方法可以恢复:
1.clear logfile     
相关命令:
alter database clear logfile '/database/oradata/skyread/redo04.log'; --已经归档的操作
alter database clear unarchived logfile '/database/oradata/skyread/redo04.log';  --inactive未归档的操作
 
2.不完全恢复until cancel 
启动到mount状态运行recover database until cancel;
3.重建控制文件resetlogs方法
采用重建控制文件脚本resetlogs的方式重建,应用相关redo,完成介质恢复,resetlogs不检查日志文件,所以不会报错
 
活动的在线日志损坏而且异常关闭的恢复:
SQL> alter database backup controlfile to trace as '/home/oracle/ctl.sql' reuse resetlogs;
 
Database altered.
 
SQL> create table t1 as select * from dba_objects;
 
Table created.
 
SQL> select * from v$log;
 
          GROUP#          THREAD#        SEQUENCE#            BYTES          MEMBERS ARC STATUS              FIRST_CHANGE# FIRST_TIME
---------------- ---------------- ---------------- ---------------- ---------------- --- ---------------- ---------------- -------------------
               1                1               31        536870912                1 YES INACTIVE             122695597193 2013-05-29 14:41:24
               2                1               32        536870912                1 YES INACTIVE             122695676280 2013-05-31 13:38:04
               3                1               29        536870912                1 YES INACTIVE             122695590894 2013-05-29 10:29:29
               4                1               33        536870912                1 YES ACTIVE               122695698110 2013-05-31 14:15:47
               5                1               34        536870912                1 NO  CURRENT              122695861946 2013-06-04 13:48:31
破坏活动归档的日志文件,破坏控制文件,异常关机:
SQL> shutdown abort;
ORACLE instance shut down.
启动到mount状态时报错:
SQL> startup;
ORACLE instance started.
 
Total System Global Area       5049942016 bytes
Fixed Size                        2090880 bytes
Variable Size                  1375733888 bytes
Database Buffers               3657433088 bytes
Redo Buffers                     14684160 bytes
ORA-00205: error in identifying control file, check alert log for more info
重建控制文件,注意如果是noresetlogs是不成功的,这里由于redo04.log损坏,只能采用resetlogs,不检查日志文件
SQL> CREATE CONTROLFILE REUSE DATABASE "SKYREAD" NORESETLOGS FORCE LOGGING ARCHIVELOG
  2      MAXLOGFILES 20
  3      MAXLOGMEMBERS 5
  4      MAXDATAFILES 1000
  5      MAXINSTANCES 8
  6      MAXLOGHISTORY 2337
  7  LOGFILE
  8    GROUP 1 '/database/oradata/skyread/redo01.log'  SIZE 512M,
  9    GROUP 2 '/database/oradata/skyread/redo02.log'  SIZE 512M,
 10    GROUP 3 '/database/oradata/skyread/redo03.log'  SIZE 512M,
 11    GROUP 4 '/database/oradata/skyread/redo04.log'  SIZE 512M,
 12    GROUP 5 '/database/oradata/skyread/redo05.log'  SIZE 512M
 13  DATAFILE
 14    '/database/oradata/skyread/system01.dbf',
 15    '/database/oradata/skyread/tbs_test.dbf',
 16    '/database/oradata/skyread/sysaux01.dbf',
 17    '/database/oradata/skyread/users01.dbf',
 18    '/database/oradata/skyread/system02.dbf',
 19    '/database2/oradata/skyread/undotbs02.dbf',
 20    '/database2/oradata/skyread/TBS_MRPMUSIC01.dbf',
 21    '/database/oradata/skyread/sf01.dbf'
 22  CHARACTER SET UTF8;
CREATE CONTROLFILE REUSE DATABASE "SKYREAD" NORESETLOGS FORCE LOGGING ARCHIVELOG
*
ERROR at line 1:
ORA-01503: CREATE CONTROLFILE failed
ORA-01565: error in identifying file '/database/oradata/skyread/redo04.log'
ORA-27046: file size is not a multiple of logical block size
Additional information: 1
 
 
SQL> CREATE CONTROLFILE REUSE DATABASE "SKYREAD" RESETLOGS FORCE LOGGING ARCHIVELOG
  2      MAXLOGFILES 20
  3      MAXLOGMEMBERS 5
  4      MAXDATAFILES 1000
  5      MAXINSTANCES 8
  6      MAXLOGHISTORY 2337
  7  LOGFILE
  8    GROUP 1 '/database/oradata/skyread/redo01.log'  SIZE 512M,
  9    GROUP 2 '/database/oradata/skyread/redo02.log'  SIZE 512M,
 10    GROUP 3 '/database/oradata/skyread/redo03.log'  SIZE 512M,
 11    GROUP 4 '/database/oradata/skyread/redo04.log'  SIZE 512M,
 12    GROUP 5 '/database/oradata/skyread/redo05.log'  SIZE 512M
 13  DATAFILE
 14    '/database/oradata/skyread/system01.dbf',
 15    '/database/oradata/skyread/tbs_test.dbf',
 16    '/database/oradata/skyread/sysaux01.dbf',
 17    '/database/oradata/skyread/users01.dbf',
 18    '/database/oradata/skyread/system02.dbf',
 19    '/database2/oradata/skyread/undotbs02.dbf',
 20    '/data
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