How long ago and how active is the old system???
As others have suggested, try bringing up a TSM image from a DB backup prior
to you deleting the filespace... but first, halt all reclamation on the 5.2
system... (to keep tapes as in tact as possible)
Once you get the image up on the other system... you could define the
library and one or two tape drives over to that system. (make sure no
reclamation can run there either)
Then just try the restore... if the data exists, it will restore it, if it
doesn't, you'll get an error trying to access the data on the tape (since if
it were written over, it won't be the expected data).
TSM, when a tape rolls scratch, is put in a first in / first out queue for
reuse so if you haven't gone through as many scratch tapes as you had on the
day you deleted the filespaces, you should still stand a good chance at
getting to the data.
I've successfully done this for a node that had been deleted for 2-3
weeks... The node had been decommissioned, we left the data for the standard
95 days and then purged the node... 2 weeks later, naturally, someone had a
critical need for some of the data. (sigh!)
Dwight
-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of
RAYMOND J RAMIREZ RAMIREZ
Sent: Tuesday, April 07, 2009 1:07 PM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: [ADSM-L] TSM database information
Hello to all,
I have a special situation.
In February I moved an AIX client from our old TSM 5.2 server to add it to
our newer TSM 5.4 server, then I deleted the file spaces that belonged to
this client and removed the client from the old server. Now the users want
to recover old files that was on the AIX client before I moved it and
deleted the file spaces. I know I can restore the database to the point
before the deletion, but I need to be sure that the files can be recovered
before attempting this. Everything was backed up on IBM 3590 cartridges in a
large IBM library, and I have a tape management report that identifies all
the TSM database tapes as available, as all of the data tapes, too.
But I also need to know which of the 4,000+ data tapes has the files I need.
I need a method to read the TSM database tape file without restoring it, and
in reading it, I wish to know which are the data tapes with the files I
need. If the tapes are available (since reclamation and reuse could have
destroyed the original files), then I will restore the database tape, and
run TSM to recover the requested files. But if most or all of the tapes were
reused (the tape management system can verify this), then I can be sure that
the data is lost and I would not have to do the TSM database restore.
It may sound confusing, but it is like knowing if there is fish in a lake
before travelling toward the lake to catch fish.I am open to any and all
suggestions and recommendations.
Raymond J. Ramirez, P.E.
Distributed Systems Supervisor
ITS Operations and Infrastructure
|
