[Veritas-bu] Number of slots suddenly decreased!

Has anyone ever seen this happen?

During last night's backups, I started seeing errors like this:

07/03/2001 01:24:58 k410ts k410ts  media id 000016 is in a DOWN drive,
                    misplaced, write protected or unmountable;
                        attempting retry with a different media id
07/03/2001 01:25:00 k410ts k410ts  media id 000017 is in a DOWN drive,
                    misplaced, write protected or unmountable;
                          attempting retry with a different media id
And so on, up to media id 000025.

I have an ADIC Scalar 100 which has 30 slots.  25 of them have tapes, with
media ids 000001-000025.  The front-panel interface on the Scalar 100 still
tells me it has 25 full slots and 5 empty ones, which is correct.  But
NetBackup has decided that the device only has 15 slots...

I ran "robtest" and it thinks there are only 15 slots.  I can't access
anything in slot 16 or above.

What could have happened?  I didn't see anything in Veritas' Support
Knowledge Base.  I'm running HP-UX 11.00 (HP9000/800), NetBackup 3.4GA.  Any
help would be most welcome.

Thanks!

========================================
Christopher Schroen
UNIX System Administrator
IMCEN/CEXEC Pentagon
tel +1 703 697 3362
mailto:christopher.schroen AT hqda.army DOT mil