Add the new disk volumes from the Hitachi unit to the existing disk pools. 
Set all the volumes in the IBM unit to readonly.
Perform MOVE DATA commands on each volume in the IBM unit.
When the IBM volumes are all empty, run DELETE VOLUME on each one of them.
 
Voila! No need to create new stgpools. This can be done as time and resources 
allow, so no interruption of service.
 
--
Mark Stapleton (mark.s AT evolvingsol DOT com)
Senior consultant

________________________________

From: ADSM: Dist Stor Manager on behalf of Keith Arbogast
Sent: Tue 2/27/2007 8:05 AM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: [ADSM-L] Migrate disk pools to new media



We have two TSM servers on AIX, both at 5.3.4.1.

We have six disk pools on one server containing 2 1/2 TB data, and
seven on the other containing 6 1/2 TB data.

We need to migrate the disk pools to new disk media, and retire the
old media.

The current disk pools are on IBM 4300 SATA. The new disk media is
Hitachi AMS 500 SATA.

What would be the best way to migrate to the new media?

Thank you,
Keith Arbogast
Indiana University