copying backup tapes

[Louis Primus]

We have 2-3581 tape drives (which hold 7 tapes each) attached to an NT
server running TSM and
we are trying to create a copy of our backup tapes.
We would like to preload the backup tapes to allow the copy process to run
in the evenings in an
unattended mode.
We have a problem knowing what sequence the backup tape will be called for
by TSM.
Does anyone know how to determine the sequence of the backup tape mounts
that TSM will ask
for during the copy process?
Thanks in advance Louie