RMAN, Veritas - Correlating Media ID after tape vaulted
- From: Jared Still <jkstill@xxxxxxxxx>
- To: undisclosed-recipients:;
- Date: Tue, 22 Sep 2009 16:04:06 -0700
When determining which tapes to recall from offsite, RMAN provides the
RESTORE DATABASE PREVIEW RECALL syntax to identify the needed tapes.
Here's an example:
RMAN> RUN
2> {
3> set until time "to_date('06/17/2009 08:00:00','mm/dd/yyyy hh24:mi:ss')";
4> restore database preview recall;
5> }
executing command: SET until clause
Starting restore at 09/22/2009 11:15:21
...
List of Backup Sets
===================
BS Key Type LV Size Device Type Elapsed Time Completion Time
------- ---- -- ---------- ----------- ------------ -------------------
2070190 Incr 0 89.78G SBT_TAPE 01:03:42 06/14/2009 18:20:43
BP Key: 2070201 Status: AVAILABLE Compressed: NO Tag:
TAG20090614T180051
Handle: PRD_T20090614_db_s21827_p1_t689536853 Media: 002774
List of Datafiles in backup set 2070190
File LV Type Ckp SCN Ckp Time Name
---- -- ---- ---------- ------------------- ----
24 0 Incr 7113842263 06/14/2009 18:00:59
S:\ORACLE\PRD\SAPDATA10\BTABD_60\BTABD.DATA60
37 0 Incr 7113842263 06/14/2009 18:00:59
S:\ORACLE\PRD\SAPDATA2\SOURCED_1\SOURCED.DATA1
48 0 Incr 7113842263 06/14/2009 18:00:59
S:\ORACLE\PRD\SAPDATA13\ES700I_1\ES700I.DATA1
Notice the Media ID of 002774. So far, so good.
The problem occurs when working with media that has been vaulted.
What occurs then is the the images on 002774 are copied to a new tape with a
different Media ID.
Let's say in this case the vaulted tape has a Media ID of 003500
So tape 003500 goes offsite, and tape 002774 is put back in the scratch pool
and reused.
At this point the RECALL PREVIEW is reporting the incorrect Media ID,
because
RMAN has no knowledge of the tape vaulting.
This brings up some questions I have not been able to find answers to.
1) What NBU command can be used to correlate the old Media ID to the new
Media ID?
I have examined and tried bpimmedia, bpimagelist and vmquery. No joy.
2) I believe the (unpublished) RMAN SBT API has routines to allow the media
ID to be updated in the catalog in the event a tape is copied to a new one
which
is moved offsite. Does anyone know where the docs are regarding this ( I
have
looked), and if Veritas makes use of it. I have looked at the CROSSCHECK and
CHANGE RMAN commands, but didn't see anything relevant.
That doesn't mean it wasn't there however, I just could have missed it.
The whole point of this post is to learn how to use the information provided
by
RMAN to request the correct tapes to be returned from offsite, given a date
and time to restore to.
Please don't suggest requesting a date range of tapes. We are already doing
that, and it is crude and time consuming.
Thanks,
Jared Still
Certifiable Oracle DBA and Part Time Perl Evangelist
Oracle Blog: http://jkstill.blogspot.com
Home Page: http://jaredstill.com
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