Cc,
   An important consideration in restoring a file is understanding the
retention settings of a copygroup and the distinction that two settings
affect HOW MANY copies of a file are kept after they change or are
deleted and two settings affect HOW LONG files are kept after they are
changed or deleted.

VERExists - how many copies
VERDeleted  - how many copies
RETExtra - how long to keep
RETOnly - how long to Keep

If a file never changes or is never deleted from the client, it will be
restorable as long as it is not deleted from the TSM server - a nice
benefit of the incremental forever method.

   As a general rule, for general filesystem backups, I keep all
versions (VERE & VERD) but set limits on how long (RETE & RETO) deleted
and changed files are kept.  This way, if a couple of files are
constantly changing, I can reliably roll back to any date within the
retention time and restore any file.  Again- this setting is something
that varies with each environment.

It may take a while to understand these settings and how they interact,
I would suggest that you set up a test policy with short settings to
observe how things work.

Cheers,
Neil Strand
Storage Engineer - Legg Mason
Baltimore, MD.
(410) 580-7491
Whatever you can do or believe you can, begin it.
Boldness has genius, power and magic.


-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of
cc1702004
Sent: Friday, September 24, 2010 5:27 AM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: [ADSM-L] Need to understand TSM restoration concept.

Hello, I'm new to TSM. I've been doing some reading on this TSM
progressive incremental backup. My understanding with this backup, there
is only one full backup (the base) and then incremental after that.
Suppose I've been backing up a new server for 28th days, then I need to
restore data backup on the 15th day, how do I restore all the data?
Sorry for asking as I'm used to the conventional backup & restore method
with Legato. Appreciate if someone can advice me.

Thanks

cc1702004

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