We have TSM setup with several tape pools in our 3494.  The tape
pools are collocated.  When we add scratch volumes to the library,
TSM grabs the scratch tapes for the tape pools even though there are
lots of tapes only partially full.  I understand this - it's the
effect of collocation.  The problem is how to keep scratch tapes
available for db backups?

q) How do I make sure some scratch volumes are always available for
db backups, or, how do I keep tsm from adding scratch tapes to a tape
pool?

Thanks

Rick