Bassam,

I may be confused on this but if you are migrating data from disk to tape
then MAXPROC has nothing to do with it! You may be getting that confused
with the backup stgpool command which creates your DR copies to take off
site. If you want to utilize all 6 drives during a migration process from
disk to tape then:

upd stgpool <stgpoolname> migproc=6

Regards,

Demetrius Malbrough
UNIX/TSM Administrator