Did you define drive to your library?       I also had to update the Mount
Limit in my TAPEPOOL00 to 4 from 2 after adding the new drives.

adsm> q devclass tapepool00

Device        Device         Storage     Device        Format
Est/Max      Mount
Class         Access            Pool
Type                               Capacity      Limit
Name          Strategy
Count                                                    (MB)
---------     ----------     -------     ---------     ------     --------
-
------
------
TAPEPOOL00     Sequential           2     3590          DRIVE
TAPEPOOL00     Sequential           2     3590          DRIVE
0.0          4

help on update devclass should give you the proper syntax for your particular
device


"Hoelscher, Hans-Peter" wrote:

> Hi all out there,
>
> we just upgraded our 3575-L12 to L18 . We implemented 2 (two) additional
> tape drives. Now there are 4 (four) tape drives in the library but I always
> see only 2 (two) occupied and some procs/sessions are waiting for media.
>
> Is someone there who can help?
>
> Thank's a lot!
>
> Hans-Peter Hölscher
> DaimlerChrysler Aerospace -DASA- Raumfahrt Infrastruktur
> Tel.     +49 421 539 5151
> FAX      +49 421 539 5698
> email  hans-peter.hoelscher AT ri.dasa DOT de