1. define volume is usually used for disk volumes for you disk storage
pools, or maybe defein dbvol for you database volumes... not for tape
volumes.

checkin libvol is how you add tapes to the library.

2. You don't normally have much control about which tapes TSM decides to
use.
So relax.
But, guessing at reasons, maybe those two tapes were used for database
backups - use q volhist to see.  TSM won't put anything else on them
until they expire.

Good luck!
Jim Coen wrote:
>
>     I have two questions, SO elementary as to be embarrassing:
>
>     1. What is the difference between 'defining a volume' and
>        'checking in a volume'?
>
>     2. I have a 20-cart Magstar tape library. It simply will not
>        use two of the tapes--they remain completely empty even
>        though ADSM tries to migrate and fails.
>
>     Thanks for the good advice.
>
>     Jim
>
>     Jim Coen
>     Washburn University

--
Mr. Lindsay Morris
Mr. Lindsay Morris
Certified: AIX,ADSM, TSM, HACMP,SP
Gresham Enterprise Storage
lmorris AT openmic DOT com
606-253-8000