Carefull implementation and coordination with TSM retention policy
changes could overcome this issue.  You could set VDE/VDD to 3 and
REV/ROV to no limit (or some acceptable value) for the stub files.  

   If the access time to the files can be minutes or hours, you might be
better served by a database referencing archives.  This could reduce
dependency on OS/filesystem upgrades messing up the HSM and provides a
small level of futureproofing your system.

Cheers,
Neil

-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of
Allen S. Rout
Sent: Friday, July 13, 2007 3:43 PM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: [ADSM-L] HSM for Windows

>> On Fri, 13 Jul 2007 08:02:48 -0400, "Schaub, Steve"
<steve_schaub AT BCBST DOT COM> said:


> We're considering implementing HSM for Windows on some large (5TB+ 
> each) fileservers.  Has anyone undertaken something similar, and care 
> to share any results?  Any gotchas?


Take a look back in the archives: the TSM product for windows which is
called 'HSM' has many, very important characteristics in which it
differs from what you may be thinking if you've ever dealt with a HSM
product in the past.

For very prominent example: When you've migrated your data, the stub
will get backed up, which will push the full version of the file to
inactive status, so it'll disappear from your backups.

My opinion is "Avoid, avoid, avoid."



- Allen S. Rout

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