We are in the midst of replacing our existing 3590J cartridges with 3590J
cartridges that have been (supposedly) upgraded to allow 20/40 gigabyte
capacity instead of of 10/20 capacity. I can successfully checkin the new
libvolumes but until they actually get used, I have no way of even guessing
how much data they can hold. I want to verify that the new 3590J cartridges
we just bought have really been upgraded to support 20/40 capacity. Is
there a way to force data to goto my new libvolume? Maybe there is a atape
(or whatever the AIX command is) command to do this?
Since we are replacing existing 3590J cartridges that are labeled
100000-100300 with (supposedly upgraded) 3590J cartridges with the same
labels, do I have any potential problems in store other than removing a
libvolume that still has data on it? They will all stay in the same device
class.

TIA,
John