Oracle数据库恢复:存储故障导致的数据损坏
从启动信息来看,首先出现故障的是控制文件:
Read from controlfile member \'oradata/ORCL/control01.ctl\' has found a fractured block (blk# 25, seq# 1909664)
Read from controlfile member \'oradata/ORCL/control02.ctl\' has found a fractured block (blk# 25, seq# 1909664)
Read from controlfile member \'oradata/ORCL/control03.ctl\' has found a fractured block (blk# 25, seq# 1909664)
我们可以用dbv来检查一下控制文件的损坏情况,控制文件块大小是16K,检查3个控制文件,都出现了不一致:
dbv file=control01.ctl
DBVERIFY: Release 10.2.0.1.0 - Production on Thu Dec 2 21:40:27 2010
Copyright (c) 1982, 2005, Oracle. All rights reserved.
DBV-00103: Specified BLOCKSIZE (8192) differs from actual (16384)
[oracle@oradbserver ORCL]$ dbv file=control01.ctl blocksize=16384
DBVERIFY: Release 10.2.0.1.0 - Production on Thu Dec 2 21:40:44 2010
Copyright (c) 1982, 2005, Oracle. All rights reserved.
DBVERIFY - Verification starting : FILE = control01.ctl
Page 19 is influx - most likely media corrupt
Corrupt block relative dba: 0x00000013 (file 0, block 19)
Fractured block found during dbv:
Data in bad block:
type: 21 format: 2 rdba: 0x00000013
last change scn: 0xffff.001d238a seq: 0x1 flg: 0x04
spare1: 0x0 spare2: 0x0 spare3: 0x0
consistency value in tail: 0x23791501
check value in block header: 0x6ad5
computed block checksum: 0xf3
Page 25 is marked corrupt
Corrupt block relative dba: 0x00000019 (file 0, block 25)
Bad check value found during dbv:
Data in bad block:
type: 21 format: 2 rdba: 0x00000019
last change scn: 0xffff.001d2388 seq: 0x1 flg: 0x04
spare1: 0x0 spare2: 0x0 spare3: 0x0
consistency value in tail: 0x23881501
check value in block header: 0xbe7a
computed block checksum: 0x52d0
Page 27 is influx - most likely media corrupt
Corrupt block relative dba: 0x0000001b (file 0, block 27)
Fractured block found during dbv:
Data in bad block:
type: 21 format: 2 rdba: 0x0000001b
last change scn: 0xffff.001d238b seq: 0x1 flg: 0x04
spare1: 0x0 spare2: 0x0 spare3: 0x0
consistency value in tail: 0x23501501
check value in block header: 0x9663
computed block checksum: 0x5fc4
Page 316 is influx - most likely media corrupt
Corrupt block relative dba: 0x0000013c (file 0, block 316)
Fractured block found during dbv:
Data in bad block:
type: 21 format: 2 rdba: 0x0000013c
last change scn: 0xffff.001d2393 seq: 0x1 flg: 0x04
spare1: 0x0 spare2: 0x0 spare3: 0x0
consistency value in tail: 0x23811501
check value in block header: 0xc99d
computed block checksum: 0x12
DBVERIFY - Verification complete
Total Pages Examined : 662
Total Pages Processed (Data) : 0
Total Pages Failing (Data) : 0
Total Pages Processed (Index): 0
Total Pages Failing (Index): 0
Total Pages Processed (Other): 319
Total Pages Processed (Seg) : 0
Total Pages Failing (Seg) : 0
Total Pages Empty : 339
Total Pages Marked Corrupt : 4
Total Pages Influx : 3
Highest block SCN : 1909665 (65535.1909665)
注意控制文件也是有一致性校验的。
但是我仍然可以通过strings命令从损坏的控制文件中提取文件名,重建控制文件。
剩下的是UNDO表空间损坏,这个不太可怕,强制来启动数据库,出现2662错误:
Errors in file /ORCL/udump/orcl_ora_4792.trc:
ORA-00600: internal error code, arguments: [2662], [1], [1574405318], [1], [1574541355], [8388617], [], []
Errors in file /ORCL/udump/orcl_ora_4792.trc:
ORA-00600: internal error code, arguments: [2662], [1], [1574405318], [1], [1574541355], [8388617], [], []
这里我设置了_minimum_giga_scn参数来推进SCN
_minimum_giga_scn=1047
最后启动数据库后,遇到了以下错误:
ORA-00604: error occurred at recursive SQL level 1
ORA-08102: index key not found, obj# 239, file 1, block 1674 (2)
ORA-12012: error on auto execute of job 1
ORA-08102: index key not found, obj# 239, file 1, block 1674 (2)
这是索引的一致性问题,找到这个对象:
SQL> select object_name from dba_objects where object_id=239;
OBJECT_NAME
--------------------------------------------------------------------------------
I_JOB_NEXT
直接DROP掉了重建:
SQL> drop index I_JOB_NEXT;
Index dropped.
SQL> create index i_job_next on job$ (next_date);
Index created.
错误消除,参考Metalink:1036858.6
建议继续学习:
- 用 LD_PRELOAD 挽救被误删的 libc.so.6 (阅读:4156)
- MySQL从压缩文件恢复数据 (阅读:3677)
- 参数_smon_internal_errlimit与数据库恢复 (阅读:3175)
- MySQL 备份和其恢复机制原理简述 (阅读:3109)
- 用bin日志中恢复MySQL数据库 (阅读:2680)
- 用CloneZilla制作紧急恢复分区 (阅读:2631)
- Zmanda让MySQL的备份与恢复更加方便快捷灵活 (阅读:2322)
- 当logfile被误删除后 (阅读:2183)
- EXT文件系统误删除数据恢复指南 (阅读:2161)
- Oracle数据库恢复:归档日志损坏案例一则 (阅读:1897)
扫一扫订阅我的微信号:IT技术博客大学习
- 作者:eygle@eygle.com(eygle) 来源: Oracle Life
- 标签: 存储故障 恢复
- 发布时间:2010-12-02 22:30:26
- [66] Oracle MTS模式下 进程地址与会话信
- [66] Go Reflect 性能
- [65] 如何拿下简短的域名
- [59] android 开发入门
- [59] 图书馆的世界纪录
- [59] IOS安全–浅谈关于IOS加固的几种方法
- [58] 【社会化设计】自我(self)部分――欢迎区
- [53] 视觉调整-设计师 vs. 逻辑
- [47] 界面设计速成
- [46] 读书笔记-壹百度:百度十年千倍的29条法则