環境：Oracle10g、Red Hat 4，Oracle運行在歸檔模式。
場景：所有控制文件和數據文件丟失。
具體步驟：
1、主機斷電，導致數據文件和所有控制文件全部丟失
SQL> !rm -f /home/oracle/oracle/product/oradata/orcl/*.ctl
SQL> !rm -f /home/oracle/oracle/product/oradata/orcl/*.dbf
SQL> !ls /home/oracle/oracle/product/oradata/orcl
redo01.log redo02.log redo03.log
SQL> shutdown abort
ORACLE instance shut down.
2、嘗試打開數據庫
SQL> startup
ORACLE instance started.
Total System Global Area 130023424 bytes
Fixed Size 1218100 bytes
Variable Size 62917068 bytes
Database Buffers 62914560 bytes
Redo Buffers 2973696 bytes
ORA-00205: error in identifying control file, check alert log for more info
提示找不到控制文件
3、拷貝數據文件和控制文件
SQL> !cp /disk2/oracle/coldbak/*.ctl /home/oracle/oracle/product/oradata/orcl/
SQL> !cp /disk2/oracle/coldbak/*.dbf /home/oracle/oracle/product/oradata/orcl/
4、嘗試打開數據庫
SQL> startup
ORACLE instance started.
Total System Global Area 130023424 bytes
Fixed Size 1218100 bytes
Variable Size 62917068 bytes
Database Buffers 62914560 bytes
Redo Buffers 2973696 bytes
Database mounted.
ORA-00338: log 2 of thread 1 is more recent than control file
ORA-00312: online log 2 thread 1:
'/home/oracle/oracle/product/oradata/orcl/redo02.log'
提示控制文件比較舊，記錄的日誌序號比redo日誌的小。
5、獲取重建控制文件的腳本
SQL> alter database backup controlfile to trace;
Database altered.
從udump目錄中找到腳本。
CREATE CONTROLFILE REUSE DATABASE "ORCL" NORESETLOGS ARCHIVELOG
MAXLOGFILES 16
MAXLOGMEMBERS 3
MAXDATAFILES 100
MAXINSTANCES 8
MAXLOGHISTORY 292
LOGFILE
GROUP 1 '/home/oracle/oracle/product/oradata/orcl/redo01.log' SIZE 50M,
GROUP 2 '/home/oracle/oracle/product/oradata/orcl/redo02.log' SIZE 50M,
GROUP 3 '/home/oracle/oracle/product/oradata/orcl/redo03.log' SIZE 50M
-- STANDBY LOGFILE
DATAFILE
'/home/oracle/oracle/product/oradata/orcl/system01.dbf',
'/home/oracle/oracle/product/oradata/orcl/undotbs01.dbf',
'/home/oracle/oracle/product/oradata/orcl/sysaux01.dbf',
'/home/oracle/oracle/product/oradata/orcl/users01.dbf'
CHARACTER SET AL32UTF8
;
6、重啓數據庫到nomount狀態、執行重建控制文件腳本
SQL> shutdown immediate
Database dismounted.
ORACLE instance shut down.
SQL> startup nomount
ORACLE instance started.
Total System Global Area 130023424 bytes
Fixed Size 1218100 bytes
Variable Size 62917068 bytes
Database Buffers 62914560 bytes
Redo Buffers 2973696 bytes
7、嘗試打開數據庫
SQL> alter database open;
alter database open
*
ERROR at line 1:
ORA-01113: file 1 needs media recovery
ORA-01110: data file 1: '/home/oracle/oracle/product/oradata/orcl/system01.dbf'
8、介質恢復
SQL> recover database;
Media recovery complete.
9、打開數據庫
SQL> alter database open;
Database altered.
SQL> conn scott/oracle
Connected.
SQL> select * from tab;
TNAME TABTYPE CLUSTERID
------------------------------ ------- ----------
DEPT TABLE
EMP TABLE
BONUS TABLE
SALGRADE TABLE
RECOVER_TEST TABLE
RECOVER_TEST2 TABLE
6 rows selected.
SQL> select count(*) from recover_test2;
COUNT(*)
----------
28672