Oh, and one more thing about dsmlabel, since that came up in this thread:

You can use more than one drive with dsmlabel- you don't have to start up
several dsmlabel processes each with their own drive, ie.

   dsmlabel -library=/dev/lmcp0 -drive=/dev/rmt1 -drive=/dev/rmt2 -keep -search

BUT- do NOT use a drive that is currently defined to the adsm server!  You
MUST delete any drive from the server & lower the mountlimit of that drive's
devclass before using it with dsmlabel (or you could halt the server).  There
has been actual data loss by not following this instruction, from a
combination of contention between the server and dsmlabel for the drive, and
a bug in the dsmlabel code (which has since been fixed- see APAR IC17064).

Craig Bell