Well I would say, then, the reason for VV is to eliminate the need for
real volumes: using virtual volumes on a remote TSM server eliminates
the need to move real tape volumes to the remote server in the event of
a disaster.  Are they useful: that's a matter or opinion.

Somebody made the very real point that you must have at least two copies
of your data: one in the primary pool and one in a copy storage pool
someplace else.  Whether that's real or virtual is up to you. 


Kelly J. Lipp
VP Manufacturing & CTO
STORServer, Inc.
485-B Elkton Drive
Colorado Springs, CO 80907
719-266-8777
lipp AT storserver DOT com

-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of
Keith Arbogast
Sent: Wednesday, August 22, 2007 2:35 PM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: [ADSM-L] Why virtual volumes?

Richard,
You asked thought provoking questions, but didn't answer mine. What is
the compelling reason to use virtual volumes? Offsite copypools and
certain restorability of the TSM database are essential. Thank you for
spotlighting those points. However, I can do those without virtual
volumes. Right? What circumstances make virtual volumes helpful,
preferable or necessary? TSM development designed and built them for a
reason. What is the reason?

This is not a rhetorical question. I am hoping someone will turn this
light bulb on for me.

With best wishes,
Keith Arbogast