oracle修復探索ORACLE之RMAN_07 磁盤損壞數據丟失恢復
瀏覽量： 次 發布日期：2023-08-11 21:27:30
探索ORACLE之RMAN_07 磁盤損壞數據丟失恢復
redo日志文件，controlfile控制文件的磁盤損壞的數據恢復。
6.1 通過強制卸載磁盤模擬數據磁盤損壞：
[root@wwldb ~]# umount -f /DBData/
umount2: 資源或設備忙
umount: /DBData: device is busy
umount2: 資源或設備忙
umount: /DBData: device is busy
[root@wwldb ~]# fuser -m -k /DBData/
/DBData/: 3508 3510 3512 3514 3516 3518 3529 3531 3535 3541 3610c
[root@wwldb ~]# fuser -m -k -i -k /DBData/ 強制kill /DBData相關進程
[root@wwldb ~]# umount -f /DBData/ 卸載/DBData
[root@wwldb ~]#
6.2 umount 后，通過alert看到實例也隨之宕機了。
Fri Jul 616:03:33 2012
Errors in file/DBSoft/admin/WWL/bdump/wwl_pmon_3502.trc:
ORA-00471: DBWR process terminated with error
Fri Jul 616:03:33 2012
PMON: terminating instance due to error 471
Instance terminated by PMON, pid = 3502
[root@wwldb bdump]# ps -ef|grep ora
root 2965 2943 0 14:39 ? 00:00:00 hald-addon-storage: polling/dev/hdc
root 3944 3050 0 16:07 pts/2 00:00:00 su - oracle
oracle 3945 3944 0 16:07 pts/2 00:00:00 -bash
oracle 3977 3945 0 16:07 pts/2 00:00:00 rlwrap sqlplus / as sysdba
oracle 3978 3977 0 16:07 pts/3 00:00:00 sqlplus as sysdba
oracle 3979 3978 0 16:07 ? 00:00:00 oracleWWL(DESCRIPTION=(LOCAL=YES)(ADDRESS=(PROTOCOL=beq)))
root 4022 3980 0 16:10 pts/4 00:00:00 grep ora
[root@wwldb bdump]#
6.3 要恢復首先要將數據庫啟動到mount狀態才能恢復
SQL> startup
ORACLE instance started.
Total System Global Area 100663296 bytes
Fixed Size 1217884 bytes
Variable Size 88083108 bytes
Database Buffers 8388608 bytes
Redo Buffers 2973696 bytes
ORA-00205: error in identifying control file, checkalert log for more info
數據庫無法啟動到mount狀態，要執行恢復必須啟動到mount狀態下才能執行，不過我們在alert日志里面看到是因為確實控制文件2數據庫無法啟動到mount狀態，見如下：
Fri Jul 616:13:24 2012
ORA-00202: control file:'/DBData/oradata/WWL/control02.ctl'
ORA-27037: unable to obtain file status
Linux Error: 2: No such file or directory
Additional information: 3
Fri Jul 616:13:24 2012
ORA-205 signalled during: ALTER DATABASE MOUNT...
這個時候我們可以嘗試查找其它控制文件是否都存在，存放在哪里，只要存在任何一個控制文件我們只需要修改參數文件來達到將數據庫啟動到mount狀態。
SQL> show parameter control
NAME TYPE VALUE
----------------------------------------------- ------------------------------
control_file_record_keep_time integer 7
control_files string /DBSoft/oradata/WWL/control01.ctl, /DBData/oradata/WWL/control02.ctl, /DBData/oradata/WWL/control03.ctl
我們通過spfile參數可以看到控制文件是存放在兩塊磁盤上，損壞的磁盤為/DBData，那么也就以為著control02.ctl和control03.ctl兩個控制文件損壞，這個時候我們可以通過/DBSoft磁盤上的control01.ctl來啟動數據庫，或者將control02.ctl和control03通過control01.ctl轉儲到其它磁盤上來啟動數據庫。
我現在通過修改參數文件僅保留control01.ctl來啟動數據庫。
SQL> alter system set control_files ='/DBSoft/oradata/WWL/control01.ctl' scope=spfile;
System altered.
SQL> shutdown immediate
ORA-01507: database not mounted
ORACLE instance shut down.
SQL> startup mount;
ORACLE instance started.
Total System Global Area 100663296 bytes
Fixed Size 1217884 bytes
Variable Size 88083108 bytes
Database Buffers 8388608 bytes
Redo Buffers 2973696 bytes
Database mounted.
SQL>
我們可以看到通過修改參數文件，現在數據庫已經啟動到mount狀態。
6.4 添加新的硬盤，并將其格式化創建文件系統，用于數據庫數據文件存放的新路徑，詳細步驟參考：
Fdisk分區方法：javascript:void(0)
Parte分區方法：javascript:void(0)
卷管理分方法：javascript:void(0)
我剛才創建的分區名稱是/DBBak2，見如下：
[oracle@wwldb /]$ df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
7.7G 3.0G 4.3G 42% /
/dev/sda1 99M 12M 82M 13% /boot
tmpfs 506M 0 506M 0% /dev/shm
/dev/mapper/DBSoft-dbsoft
20G 1.7G 18G 9% /DBSoft
/dev/mapper/DBBack-DBBack001
20G 720M 18G 4% /DBBak
/dev/mapper/DBBak2-DBBak2
20G 173M 19G 1% /DBBak2
6.5 創建對應的目錄
[oracle@wwldb ~]$ mkdir /DBBak2/oradata/WWL
[oracle@wwldb WWL]$ pwd
/DBBak2/oradata/WWL
[oracle@wwldb WWL]$ ls -a
. ..
6.6 將數據文件恢復到/DBBak2/oradata/WWL目錄中
查看備份信息：
RMAN> list backup;
using target database control file instead of recoverycatalog
List of Backup Sets
===================
BS Key Type LVSize Device Type Elapsed TimeCompletion Time
------- ---- -- ---------- ----------- ---------------------------
6 Full 540.81M DISK 00:01:13 06-JUL-12
BP Key:6 Status: AVAILABLE Compressed: NO Tag: TAG20120706T154942
PieceName: /DBBak/bak_WWL_07_06_06nfdv8n_1_1
List ofDatafiles in backup set 6
File LV TypeCkp SCN Ckp Time Name
---- -- -------------- --------- ----
1 Full 1263589 06-JUL-12 /DBData/WWL/system01.dbf
2 Full 1263589 06-JUL-12 /DBData/WWL/undotbs01.dbf
3 Full 1263589 06-JUL-12 /DBData/WWL/sysaux01.dbf
4 Full 1263589 06-JUL-12 /DBData/WWL/users01.dbf
5 Full 1263589 06-JUL-12 /DBData/WWL/wwl001.dbf
6 Full 1263589 06-JUL-12 /DBData/WWL/wwl002.dbf
7 Full 1263589 06-JUL-12 /DBData/WWL/wwl003.dbf
BS Key Type LVSize Device Type Elapsed TimeCompletion Time
------- ---- -- ---------- ----------- ---------------------------
7 Full 7.11M DISK 00:00:01 06-JUL-12
BP Key:7 Status: AVAILABLE Compressed: NO Tag: TAG20120706T155059
PieceName: /DBBak/bakctl_c-5520179-20120706-01
Control FileIncluded: Ckp SCN: 1263606 Ckp time:06-JUL-12
SPFILEIncluded: Modification time: 06-JUL-12
通過備份信息執行如下恢復到新的磁盤上：
RMAN> run {
2> set newname fordatafile '/DBData/WWL/system01.dbf' to '/DBBak2/oradata/WWL/system01.dbf';
3> set newname fordatafile '/DBData/WWL/undotbs01.dbf' to '/DBBak2/oradata/WWL/undotbs01.dbf';
4> set newname fordatafile '/DBData/WWL/sysaux01.dbf' to '/DBBak2/oradata/WWL/sysaux01.dbf';
5> set newname fordatafile '/DBData/WWL/users01.dbf' to '/DBBak2/oradata/WWL/users01.dbf';
6> set newname fordatafile '/DBData/WWL/wwl001.dbf' to '/DBBak2/oradata/WWL/wwl01.dbf';
7> set newname fordatafile '/DBData/WWL/wwl002.dbf' to '/DBBak2/oradata/WWL/wwl02.dbf';
8> set newname fordatafile '/DBData/WWL/wwl003.dbf' to '/DBBak2/oradata/WWL/wwl03.dbf';
9> restore database;
10> switch datafile all;
11> recover database;
12> }
executing command: SETNEWNAME
executing command: SETNEWNAME
executing command: SETNEWNAME
executing command: SETNEWNAME
executing command: SETNEWNAME
executing command: SETNEWNAME
executing command: SETNEWNAME
Starting restore at 06-JUL-12
allocated channel: ORA_DISK_1
channel ORA_DISK_1: sid=46devtype=DISK
channel ORA_DISK_1: startingdatafile backupset restore
channel ORA_DISK_1:specifying datafile(s) to restore from backup set
restoring datafile 00001 to/DBBak2/oradata/WWL/system01.dbf
restoring datafile 00002 to/DBBak2/oradata/WWL/undotbs01.dbf
restoring datafile 00003 to/DBBak2/oradata/WWL/sysaux01.dbf
restoring datafile 00004 to/DBBak2/oradata/WWL/users01.dbf
restoring datafile 00005 to/DBBak2/oradata/WWL/wwl01.dbf
restoring datafile 00006 to/DBBak2/oradata/WWL/wwl02.dbf
restoring datafile 00007 to/DBBak2/oradata/WWL/wwl03.dbf
channel ORA_DISK_1: readingfrom backup piece /DBBak/bak_WWL_07_06_06nfdv8n_1_1
channel ORA_DISK_1: restoredbackup piece 1
piecehandle=/DBBak/bak_WWL_07_06_06nfdv8n_1_1 tag=TAG20120706T154942
channel ORA_DISK_1: restorecomplete, elapsed time: 00:01:46
Finished restore at 06-JUL-12
datafile 1 switched todatafile copy
input datafile copy recid=8stamp=787945637 filename=/DBBak2/oradata/WWL/system01.dbf
datafile 2 switched todatafile copy
input datafile copy recid=9stamp=787945637 filename=/DBBak2/oradata/WWL/undotbs01.dbf
datafile 3 switched todatafile copy
input datafile copy recid=10stamp=787945637 filename=/DBBak2/oradata/WWL/sysaux01.dbf
datafile 4 switched todatafile copy
input datafile copy recid=11stamp=787945637 filename=/DBBak2/oradata/WWL/users01.dbf
datafile 5 switched todatafile copy
input datafile copy recid=12stamp=787945637 filename=/DBBak2/oradata/WWL/wwl01.dbf
datafile 6 switched todatafile copy
input datafile copy recid=13stamp=787945637 filename=/DBBak2/oradata/WWL/wwl02.dbf
datafile 7 switched todatafile copy
input datafile copy recid=14stamp=787945637 filename=/DBBak2/oradata/WWL/wwl03.dbf
Finsh
恢復腳本如下：
run {
set newname for datafile'/DBData/WWL/system01.dbf' to '/DBBak2/oradata/WWL/system01.dbf';
set newname for datafile '/DBData/WWL/undotbs01.dbf'to '/DBBak2/oradata/WWL/undotbs01.dbf';
set newname for datafile'/DBData/WWL/sysaux01.dbf' to '/DBBak2/oradata/WWL/sysaux01.dbf';
set newname for datafile'/DBData/WWL/users01.dbf' to '/DBBak2/oradata/WWL/users01.dbf';
set newname for datafile'/DBData/WWL/wwl002.dbf' to '/DBBak2/oradata/WWL/wwl02.dbf';
set newname for datafile'/DBData/WWL/wwl003.dbf' to '/DBBak2/oradata/WWL/wwl03.dbf';
restore database;
switch datafile all;
}
6.7 生成控制文件trace文件，用來重建控制文件：
SQL> alter database backupcontrolfile to trace as '/tmp/ctl.txt';
SQL> shutdown immediate;
ORA-01109: database not open
Database dismounted.
ORACLE instance shut down.
SQL> STARTUP NOMOUNT
ORACLE instance started.
兆柏數據恢復公司
Total System Global Area 100663296 bytes
Fixed Size 1217884 bytes
Variable Size 88083108 bytes
Database Buffers 8388608 bytes
Redo Buffers 2973696 bytes
SQL> CREATE CONTROLFILEREUSE DATABASE "WWL" RESETLOGS ARCHIVELOG
MAXDATAFILES 100
MAXLOGFILES 16
MAXLOGMEMBERS 3
MAXINSTANCES 8
MAXDATAFILES 100
5 MAXINSTANCES 8
兆柏數據恢復公司6 MAXLOGHISTORY 292
7 LOGFILE
8 GROUP 1 '/DBBak2/oradata/WWL/redo01.log' SIZE 30M,
GROUP 3 '/DBBak2/oradata/WWL/redo03.log' SIZE 30M,
10 GROUP 4 (
) SIZE 128M,
GROUP 5 (
'/DBBak2/oradata/WWL/redo5a.log',
'/DBBak2/oradata/WWL/redo4a.log',
'/DBBak2/oradata/WWL/redo4b.log'
) SIZE 128M,
GROUP 5 (
'/DBBak2/oradata/WWL/redo5a.log',
'/DBBak2/oradata/WWL/redo5b.log'
) SIZE 128M,
GROUP 6 (
'/DBBak2/oradata/WWL/redo6a.log',
'/DBBak2/oradata/WWL/redo6b.log'
) SIZE 128M,
GROUP 7 (
'/DBBak2/oradata/WWL/redo7a.log',
'/DBBak2/oradata/WWL/redo7b.log'
) SIZE 128M
DATAFILE
'/DBBak2/oradata/WWL/system01.dbf',
'/DBBak2/oradata/WWL/undotbs01.dbf',
'/DBBak2/oradata/WWL/sysaux01.dbf',
'/DBBak2/oradata/WWL/users01.dbf',
'/DBBak2/oradata/WWL/wwl01.dbf',
'/DBBak2/oradata/WWL/wwl02.dbf',
'/DBBak2/oradata/WWL/wwl03.dbf'
CHARACTER SET ZHS16CGB231280
35 ;
Control file created.
6.8 以resetlog模式啟動數據庫：
SQL> alter database openresetlogs;
6.9 刪除原redo日志文件，重建redo新日志文件組到新的磁盤上：
SQL> alterdatabase drop logfile group 1;
Databasealtered.
SQL> alterdatabase drop logfile group 2;
Databasealtered.
SQL> alterdatabase drop logfile group 3;
Database altered.
SQL>
SQL> alter database addlogfile group 4 ('/DBBak2/oradata/WWL/redo4a.log','/DBBak2/oradata/WWL/redo4b.log')size 128M;
Database altered.
SQL> alter database addlogfile group 5('/DBBak2/oradata/WWL/redo5a.log','/DBBak2/oradata/WWL/redo5b.log') size 128M;
Database altered.
SQL> alter database addlogfile group 6('/DBBak2/oradata/WWL/redo6a.log','/DBBak2/oradata/WWL/redo6b.log') size 128M;
Database altered.
SQL> alter database addlogfile group 7 ('/DBBak2/oradata/WWL/redo7a.log','/DBBak2/oradata/WWL/redo7b.log')size 128M;
Database altered.
SQL>
6.10 查看日志組信息及狀態：
SQL> select * from v$log;
GROUP# THREAD# SEQUENCE# BYTES MEMBERS ARC STATUS FIRST_CHANGE# FIRST_TIM
---------- -------------------- ---------- ---------- --- ---------------- ------------- ---------
4 1 0 134217728 2 YES UNUSED 0
5 1 0 134217728 2 YES UNUSED 0
6 1 0 134217728 2 YESUNUSED 0
7 1 1 134217728 2 NO CURRENT 1263590 06-JUL-12
SQL> alter system switchlogfile;
System altered.
SQL> alter system switchlogfile;
System altered.
SQL> alter system switchlogfile;
System altered.
SQL> alter system switchlogfile;
System altered.
SQL> select * from v$log;
GROUP# THREAD# SEQUENCE# BYTES MEMBERS ARC STATUS FIRST_CHANGE# FIRST_TIM
---------- -------------------- ---------- ---------- --- ---------------- ------------- ---------
4 1 2 134217728 2 YES INACTIVE 1263859 06-JUL-12
5 1 oracle修復 3 134217728 2 YESINACTIVE 1263861 06-JUL-12
6 1 4 134217728 2 YES INACTIVE 1263863 06-JUL-12
oracle修復 7 1 5 134217728 2 NO CURRENT 1263866 06-JUL-12
SQL>
至此恢復完成。
重要數據丟失請聯系兆柏數據恢復公司 重要數據丟失請聯系兆柏數據恢復公司 重要數據丟失請聯系兆柏數據恢復公司
. oracle11g修復,Oracle 11g TNS-12545錯誤排查與修復指南
. 控制器壞了如何修復視頻,控制器故障排查與視頻修復技巧解析
. 磁盤陣列壞了怎么修復啊,RAID磁盤陣列故障診斷與修復全攻略
. 戴爾筆記本硬盤損壞怎么辦,戴爾筆記本硬盤故障排查與修復指南
. 數據恢復中心有哪些,揭秘硬盤故障與數據丟失的解決方案n2. 硬盤數據恢復攻略：數據恢
. 戴爾筆記本硬盤損壞修復,戴爾筆記本硬盤故障排查與修復指南
. oracle數據庫數據恢復,Oracle數據庫數據恢復策略與實戰指南
. 硬盤數據恢復后文件損壞怎么辦,硬盤數據恢復后文件損壞的應對策略與修復方法
. 恢復數據,SEO優化新策略——探索雙標題在提升文章收錄與排名中的優勢
. oracle數據庫官網,深入探索Oracle數據庫官網——您的數據庫學習與資源寶庫
QQ客服