oracle丢失关键表空间的恢复

SQL> select name from v$datafile;

NAME

---------------------------------------------------------------------------------------------

/u01/app/oracle/oradata/orcl/system01.dbf

/u01/app/oracle/oradata/orcl/sysaux01.dbf

/u01/app/oracle/oradata/orcl/undotbs01.dbf

/u01/app/oracle/oradata/orcl/users01.dbf

/u01/app/oracle/oradata/orcl/example01.dbf

SQL> !rm -rf /u01/app/oracle/oradata/orcl/undotbs01.dbf

SQL> conn scott/tiger

Connected.

SQL> update e set object_id=object_id+1;

update e set object_id=object_id+1

       *

ERROR at line 1:

ORA-01116: error in opening database file 3

ORA-01110: data file 3: '/u01/app/oracle/oradata/orcl/undotbs01.dbf'

ORA-27041: unable to open file

Linux Error: 2: No such file or directory

Additional information: 3

使用rman恢复

[oracle@oel ~]$ rman target /

Recovery Manager: Release 11.2.0.1.0 - Production on Thu May 26 13:54:35 2016

Copyright (c) 1982, 2009, Oracle and/or its affiliates.  All rights reserved.

connected to target database: ORCL (DBID=1437288826)

RMAN> run{

2> startup force mount;

3> restore datafile 3;

4> recover datafile 3;

5> sql 'alter database open';

6> }

Oracle instance started

database mounted

Total System Global Area     451964928 bytes

Fixed Size                     1337156 bytes

Variable Size                201328828 bytes

Database Buffers             243269632 bytes

Redo Buffers                   6029312 bytes

Starting restore at 26-MAY-16

using target database control file instead of recovery catalog

allocated channel: ORA_DISK_1

channel ORA_DISK_1: SID=355 device type=DISK

channel ORA_DISK_1: starting datafile backup set restore

channel ORA_DISK_1: specifying datafile(s) to restore from backup set

channel ORA_DISK_1: restoring datafile 00003 to /u01/app/oracle/oradata/orcl/undotbs01.dbf

channel ORA_DISK_1: reading from backup piece /u02/ORCL/backupset/2016_05_26/o1_mf_nnndf_TAG20160526T134623_cnf3fhs0_.bkp

channel ORA_DISK_1: piece handle=/u02/ORCL/backupset/2016_05_26/o1_mf_nnndf_TAG20160526T134623_cnf3fhs0_.bkp tag=TAG20160526T134623

channel ORA_DISK_1: restored backup piece 1

channel ORA_DISK_1: restore complete, elapsed time: 00:00:07

Finished restore at 26-MAY-16

Starting recover at 26-MAY-16

using channel ORA_DISK_1

starting media recovery

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

Finished recover at 26-MAY-16

sql statement: alter database open

SQL> conn scott/tiger

Connected.

SQL> update e set object_id=object_id+1 where rownum<1000;

999 rows updated.

SQL> rollback;

Rollback complete.