RMAN : Restoring datafiles to Nondefault locations
You have just experiences a serious media failure and won’t able to restore datafiles to their original location.In this case, you need to restore datafiles to a nondafault location.
You can use set newname and switch commands to restore datafiles to nondefault locations. You must set newname command and the switch command from within a run{} block.
The switch command updates the target database controlfile with new location of the datafile. It’s OK to use switch datafile all, which updates all datafile locations.
If you are performing Point in time recovery (POITR) ensure you switch datafiles before you perform the recovery.
Now we can see the examples.
I have created one tablespace.Its name TEST with two datafiles test01.dbf,test02.dbf
The location is
C:\APP\MAZAR\ORADATA\OWN\TEST01.DBF (6) –> C:\APP\MAZAR\ORADATA\OWN\new\TEST01.DBF (Target new location)
C:\APP\MAZAR\ORADATA\OWN\TEST02.DBF (7) –> C:\APP\MAZAR\ORADATA\OWN\new\TEST02.DBF (Target new location)
6,7 Datafile ID
startup mount stage
SQL> shutdown immediate
Database closed.
Database dismounted.
ORACLE instance shut down.
SQL> startup mount
ORACLE instance started.
Total System Global Area 1046224896 bytes
Fixed Size 1379212 bytes
Variable Size 167773300 bytes
Database Buffers 872415232 bytes
Redo Buffers 4657152 bytes
Database mounted.
SQL> host
Microsoft Windows [Version 6.1.7600]
Copyright (c) 2009 Microsoft Corporation. All rights reserved.
C:\Users\mazar>rman target /
Recovery Manager: Release 11.2.0.1.0 – Production on Wed Sep 1 11:31:13 2010
Copyright (c) 1982, 2009, Oracle and/or its affiliates. All rights reserved.
connected to target database: OWN (DBID=1547349083, not open)
RMAN> run{
2> set newname for datafile 6 to ‘C:\APP\MAZAR\ORADATA\OWN\new/test01.dbf’;
3> set newname for datafile 7 to ‘C:\APP\MAZAR\ORADATA\OWN\new\test02.dbf’;
4> restore tablespace “TEST”;
5> switch datafile all;
6> recover tablespace “TEST”;
7> alter database open;
8> }
executing command: SET NEWNAME
executing command: SET NEWNAME
Starting restore at 01-SEP-10
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=10 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 00006 to C:\APP\MAZAR\ORADATA\OWN\new/tes
t01.dbf
channel ORA_DISK_1: restoring datafile 00007 to C:\APP\MAZAR\ORADATA\OWN\new\tes
t02.dbf
channel ORA_DISK_1: reading from backup piece C:\APP\MAZAR\FLASH_RECOVERY_AREA\O
WN\BACKUPSET\2010_09_01\O1_MF_NNNDF_TAG20100901T112433_67W3G28B_.BKP
channel ORA_DISK_1: piece handle=C:\APP\MAZAR\FLASH_RECOVERY_AREA\OWN\BACKUPSET\
2010_09_01\O1_MF_NNNDF_TAG20100901T112433_67W3G28B_.BKP tag=TAG20100901T112433
channel ORA_DISK_1: restored backup piece 1
channel ORA_DISK_1: restore complete, elapsed time: 00:00:03
Finished restore at 01-SEP-10
datafile 6 switched to datafile copy
input datafile copy RECID=3 STAMP=728566586 file name=C:\APP\MAZAR\ORADATA\OWN\N
EW\TEST01.DBF
datafile 7 switched to datafile copy
input datafile copy RECID=4 STAMP=728566586 file name=C:\APP\MAZAR\ORADATA\OWN\N
EW\TEST02.DBF
Starting recover at 01-SEP-10
using channel ORA_DISK_1
starting media recovery
media recovery complete, elapsed time: 00:00:00
Finished recover at 01-SEP-10
database opened
If the database is open, you can place the datafile offline and then set their new names for restore and recovery.
RMAN> run{
2> sql ‘alter database datafile 6,7 offline’;
3> set newname for datafile 6 to ‘C:\APP\MAZAR\ORADATA\OWN\new\test01.dbf’;
4> set newname for datafile 7 to ‘C:\APP\MAZAR\ORADATA\OWN\new\test02.dbf’;
5> restore datafile 6,7;
6> switch datafile all;
7> recover datafile 6,7;
8> sql ‘alter database datafile 6,7 online’;
9> }
sql statement: alter database datafile 6,7 offline
executing command: SET NEWNAME
executing command: SET NEWNAME
Starting restore at 01-SEP-10
using channel ORA_DISK_1
channel ORA_DISK_1: restoring datafile 00006
input datafile copy RECID=5 STAMP=728566586 file name=C:\APP\MAZAR\ORADATA\OWN\T
EST01.DBF
destination for restore of datafile 00006: C:\APP\MAZAR\ORADATA\OWN\new\test01.d
bf
channel ORA_DISK_1: copied datafile copy of datafile 00006
output file name=C:\APP\MAZAR\ORADATA\OWN\NEW\TEST01.DBF RECID=0 STAMP=0
channel ORA_DISK_1: restoring datafile 00007
input datafile copy RECID=6 STAMP=728566586 file name=C:\APP\MAZAR\ORADATA\OWN\T
EST02.DBF
destination for restore of datafile 00007: C:\APP\MAZAR\ORADATA\OWN\new\test02.d
bf
channel ORA_DISK_1: copied datafile copy of datafile 00007
output file name=C:\APP\MAZAR\ORADATA\OWN\NEW\TEST02.DBF RECID=0 STAMP=0
Finished restore at 01-SEP-10
Starting recover at 01-SEP-10
using channel ORA_DISK_1
starting media recovery
media recovery complete, elapsed time: 00:00:01
Finished recover at 01-SEP-10
sql statement: alter database datafile 6,7 online
RMAN>
You can check the new datafiles locations using report schema command.
RMAN> report schema;
Report of database schema for database with db_unique_name OWN
List of Permanent Datafiles
===========================
File Size(MB) Tablespace RB segs Datafile Name
—- ——– ——————– ——- ————————
1 700 SYSTEM *** C:\APP\MAZAR\ORADATA\OWN\SYSTEM01.DBF
2 600 SYSAUX *** C:\APP\MAZAR\ORADATA\OWN\SYSAUX01.DBF
3 500 UNDOTBS1 *** C:\APP\MAZAR\ORADATA\OWN\UNDOTBS01.DBF
4 5 USERS *** C:\APP\MAZAR\ORADATA\OWN\USERS01.DBF
5 100 RMAN001 *** C:\APP\MAZAR\ORADATA\OWN\RMAN01.DBF
6 100 TEST *** C:\APP\MAZAR\ORADATA\OWN\NEW\TEST01.DBF
7 100 TEST *** C:\APP\MAZAR\ORADATA\OWN\NEW\TEST02.DBF
and also you can check from v$datafile view.
DBA 