【转载】原文地址：http://blog.itpub.net/28850681/viewspace-759566/

机器断电以后，重新启动报如下错误：

在cmd命令窗口下，输入sqlplus / as sysdba

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,[]
Errors in file /u01/app/oracle/diag/rdbms/asmdb/ASMDB/trace/ASMDB_ora_5210.trc:
ORA-00600: internal error code,[]
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.
(数据库未打开)

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.

（恢复介质）

sql> alter database open;

Database altered. 介质恢复之后，再打开数据库就好了。同时也可以用PL\sql连接数据库了，good. 原文链接：https://www.f2er.com/oracle/210807.html