RMAN Restore Scenario: all copies of control files are lost
- From: Roger Xu <wellmetus@xxxxxxxxx>
- To: oracle-l@xxxxxxxxxxxxx
- Date: Fri, 20 Nov 2009 10:53:01 -0600
Hi RMAN gurus,
Say one backs up a database using the following RMAN block daily:
backup database archive log all;
SQL 'alter database backup controlfile to '/oradata/controlfile.bak';
All copies of the current control files were in the same disk and the disk
crashed.
Assuming other parts of the database are fine, will the following steps work
to restore
the database to the minute when the disk crashed?
1) copy /oradata/controlfile.bak to the control_files location specified in
the SPFILE (or PFILE);
2) startup mount;
3) find out the most recent archived redo log sequence number (12345) in
log_archive_dest_1;
4) restore database until sequence 12346;
5) alter database open resetlogs;
The reason this may work is that RMAN automatically searches for archived
and online redo logs that are not recorded
in the RMAN repository (in this case the backup controlfile).
Do you think this is one of the many advantages using RMAN vs user-managed
backup?
Thanks,
Roger Xu
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