Hi Laura:

Had similar problems a while ago with DLT7000s in a STK9710.
The problem was finally diagnosed as being caused by a power spike
from one of the drives. This affected the whole SCSI chain. Have
STK come in and check the power supplies of all drives. There are
very fine tolerances and if you are outside the tolerance all
hell can break loose. Anyways once this was done happiness returned
to the library.

Kindest Regards,

West Suhanic