ORA-00600: internal error code, arguments: [kcratr_scan_lastbwr]错误处理

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机器断电以后，重新启动报如下错误：

[oracle@zhuxg ~]$ sqlplus / as sysdba

SQL*Plus: Release 11.2.0.3.0 Production on Wed May 1 11:28:49 2013

Copyright (c) 1982, 2011, Oracle. All rights reserved.

Connected to an idle instance.

SQL> startup
ORACLE instance started.

Total System Global Area 276197376 bytes
Fixed Size                  1344400 bytes
Variable Size             171969648 bytes
Database Buffers           96468992 bytes
Redo Buffers                6414336 bytes
Database mounted.
ORA-00600: internal error code, arguments: [kcratr_scan_lastbwr], [], [], [],[], [], [], [], [], [], [], []

在alert日志中有如下报错信息：

Wed May 01 08:21:09 2013
Starting ORACLE instance (normal)
LICENSE_MAX_SESSION = 0
LICENSE_SESSIONS_WARNING = 0
Picked latch-free SCN scheme 2
:
Aborting crash recovery due to error 600
Errors in file /u01/app/oracle/diag/rdbms/asmdb/ASMDB/trace/ASMDB_ora_5210.trc:
ORA-00600: internal error code, arguments: [kcratr_scan_lastbwr], [], [], [], [], [], [], [], [], [], [], []
Errors in file /u01/app/oracle/diag/rdbms/asmdb/ASMDB/trace/ASMDB_ora_5210.trc:
ORA-00600: internal error code, arguments: [kcratr_scan_lastbwr], [], [], [], [], [], [], [], [], [], [], []
ORA-600 signalled during: ALTER DATABASE OPEN /* db agent *//* {0:0:2} */...

在ASMDB_ora_5210.trc文件中有如下的信息：

..................

17755E0 03C10222 096F780B 36380113 6029D938 ["....xo...868.)`]
17755F0 D843E0FF 7CAA8000 02C1B000 88DC0248 [..C....|....H...]
Reading datafile '+ZHUXGASM/asmdb/datafile/undotbs1.258.813246367' for corruption at rdba: 0x00c00858 (file 3, block 2136)
Reread (file 3, block 2136) found same corrupt data (logically corrupt)
******** WRITE VERIFICATION FAILED ********

由此我们知道是因为数据库宕机之后，出现了逻辑坏块 (logically corrupt)，因此需要进行介质恢复。

SQL> shutdown immediate;
ORA-01109: database not open

Database dismounted.
ORACLE instance shut down.
SQL> startup mount;
ORACLE instance started.

Total System Global Area 276197376 bytes
Fixed Size                  1344400 bytes
Variable Size             171969648 bytes
Database Buffers           96468992 bytes
Redo Buffers                6414336 bytes
Database mounted.
SQL> recover database;
Media recovery complete.
SQL> alter database open;

Database altered.

介质恢复之后，再打开数据库就好了。