I'm having problems with my TK50 tape drive. Most of the times
when I read or write on it it crashes the system with the
following console messages (approximately because I copied them
by hand):

asc_intr: tgt 5 command phase TC zero with non-empty ...
asc_intr: tgt 5 command phase TC zero; padding command
asc_get_status: cmd reg 11, fifo cnt 3

and/or:

asc_mtr: 1: len 249 (fifo 0)
asc0: SCSI device 5: rejecting message 0x0
asc0: SCSI device 5: unexpected disconnect

I try many combinations of hardware changes:swaping TK50 drives
and cables, etc. Can somebody help? Thanks in advance.

Dan