We have a silo w/ 3590 tapes(10gig).  its filling up pretty quick.  Does
anyone know how to activate the compression feature which changes the dev
class to 3590C.  and how do you check its actually working. theoretically
were supposed to be able to have up 25gig on one tape.  Does it affect
the current storage pools that contain data or just newly added tapes?
has anyone sucessfully done this?

Thanks for your help in advance!

Bill Aughenbaugh
Moodys investor Service
Aughenbw AT moodys DOT com