ADSM-L

Re: onsite and offsite tapes destroyed

2002-09-23 05:57:58
Subject: Re: onsite and offsite tapes destroyed
From: Zlatko Krastev/ACIT <acit AT ATTGLOBAL DOT NET>
To: ADSM-L AT VM.MARIST DOT EDU
Date: Mon, 23 Sep 2002 12:56:14 +0300
1. Because TSM allows you intentionally to set tape tape as
unavailable/destroyed (as you know for some errors it will do it
automatically) and return it back to read-write/read-only, no automatic
resolution is attempted in current versions. You have to do the following
(both operations are manual):
- perform 'restore volume' for each of primary pool volumes - onsite1, 7,
9 and 11 in your example. If some data was on destroyed offsite volumes it
would not be destroyed. That data should be described in DB as still
residing on destroyed primary volume and the volume itself ought not be
deleted (I never tested the last so am answering theoretically but expect
similar behavior as in 'move data'-command). Second copypool might be of
great help there.
- delete offsite volumes and run 'backup stgpool' to recreate destroyed
data copies.

2. The file can be seen from the client because information is retrieved
from the DB not from the volumes.

3. These files should expire as any other ones. If destroyed volume is
emptied on expiration or offsite reclamation it will be deleted from the
stgpool and become scratch (if not defined manually in the pool).

Zlatko Krastev
IT Consultant




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Subject:        onsite and offsite tapes destroyed

Let's say for the sake of this discussion the following is true.
Onsitetape1, 7, 9 and 11 are destroyed and not in the library, they have
mixed node data on them. Offsitetape6, 9 and 15 have also been destroyed,
they also have mixed node data on them. These tapes don't mirror each
other
but could have some of the same data on them.

Question(s)

1.      If all tapes are marked destroyed is TSM going to try and recreate
anything automatically or do I have to manually perform an operation?
2.      If someone wants to restore a file that happened to be on those,
and
both tapes have been destroyed, what do they see from their baclient GUI?
Do
they see the file backed up for that date?
3.      Are all the files that were on those tapes simply expired from the
inventory so they don't see anything?

Thanks,
Geoff Gill
TSM Administrator
NT Systems Support Engineer
SAIC
E-Mail:    <mailto:gillg AT saic DOT com> gillg AT saic DOT com
Phone:  (858) 826-4062
Pager:   (877) 905-7154

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