恢复损坏的数据文件

环境:

OS:Red Hat Linux As 4

DB:10gR2

提前准备:全备份整个数据库.

 

步骤1:先停掉数据库

shutdown immediate

步骤2.模拟损坏某个数据文件,这里使用vi编辑数据文件hxl01.dbf

步骤3:启动数据库

SQL> startup
ORACLE instance started.

Total System Global Area  524288000 bytes
Fixed Size                  1220360 bytes
Variable Size             163578104 bytes
Database Buffers          356515840 bytes
Redo Buffers                2973696 bytes
Database mounted.
ORA-01157: cannot identify/lock data file 5 - see DBWR trace file
ORA-01110: data file 5: '/u01/app/oracle/oradata/oracl/hxl01.dbf'

 

步骤4:恢复损坏的数据库

run{
allocate channel c1 type disk;
allocate channel c2 type disk;
restore datafile 5;
recover datafile 5;
sql 'alter database open';
release channel c1;
release channel c2;
}

allocated channel: c1
channel c1: sid=155 devtype=DISK

allocated channel: c2
channel c2: sid=154 devtype=DISK

Starting restore at 28-DEC-11

channel c1: starting datafile backupset restore
channel c1: specifying datafile(s) to restore from backup set
restoring datafile 00005 to /u01/app/oracle/oradata/oracl/hxl01.dbf
channel c1: reading from backup piece /u01/rman_backup/2011/201112/20111227/df_770980962_46_1.bak
channel c1: restored backup piece 1
piece handle=/u01/rman_backup/2011/201112/20111227/df_770980962_46_1.bak tag=TAG20111227T092240
channel c1: restore complete, elapsed time: 00:00:05
Finished restore at 28-DEC-11

Starting recover at 28-DEC-11

starting media recovery
media recovery complete, elapsed time: 00:00:02

Finished recover at 28-DEC-11

sql statement: alter database open

released channel: c1

released channel: c2