I believe that if you delete a tape and discard the data, the copy pool data
will be deleted as well.  Not what you want to do!  So instead of deleting
the volume, update to access=destroyed:

update vol mumble access=destroyed

You can then do a restore volume if you choose, or let it die a natural
death due to expiration.  Since it's marked destroyed, if a restore request
is received, it will be satisfied from the copy storage pool volumes.  Since
these are probably off-site, you will get a mount request.  This could be a
pain in the arse.

If you want to restore the volume, you can do a restore volume mumble
preview=yes to find out which tapes will be required.

Kelly J. Lipp
Storage Solutions Specialists, Inc.
PO Box 51313
Colorado Springs CO 80949
719-531-5926
www.storsol.com
lipp AT storsol DOT com