If you are simply moving the DB volumes to another physical device within
the same volume group, you may want to use 'migratepv' to do so. This
allows you to move the DB while still online to ADSM.

At 04:04 PM 8/4/97 +0200, you wrote:
>Hi,
>
>I am in the process of reorganizing the AIX volume group containing
>the ADSM volumes. When a DB volume has to be moved to a different
>disk, there seem to be two alternatives (the DB volumes are mirrored):
>
>a)  Have enough free space in the DB and delete the DB volume. If it is
>    the last copy, the deletion will in effect copy it's content to
>    other DB volumes.
>
>b)  VARY OFF the DB volume (provided there is still an online copy),
>    move the AIX logical volume to the target disk, VARY ON the DB Volume.
>    The VARY ON should trigger a synchronisation process.
>
>Alternative b) looks attractive to me, but I never went this way. Has
>anybody done it? Are there any drawbacks? How long will the
>synchronisation process last (compared to copying the volume as
>to be done in alternative a)?
>
>--
>Reinhard Mersch                     Westfaelische Wilhelms-Universitaet
>Universitaetsrechenzentrum, Einsteinstrasse 60, 48149 Muenster, Germany
>E-Mail: mersch AT uni-muenster DOT de                  Phone: +49(251)83-31583
>
>