Hi Guys,

Just recently acquired a cast off Sun DDS3 SCSI tape drive.  It's an external 
unit and connected to my internal Adaptec 2940UW controller.  The problem i'm 
experiencing is anytime I try issuing a command with mt for instance:

% mt -f /dev/rst0 status

The mt process will just hang, the process at that point is completely 
un-killable implying that there's some kinda blocking read system call 
happening.  I've tried the tape drive on another machine and it seems to work 
fine.  On boot dmesg identifies the controller and drive fine, and when booted 
with a tape loaded it acquires info about the tape itself.

-- dmesg output --
ahc0 at pci0 dev 9 function 0 "Adaptec AHA-2940U" rev 0x00: irq 11
scsibus2 at ahc0: 16 targets
st0 at scsibus2 targ 4 lun 0: <HP, C1537A, L706> SCSI2 1/sequential removable
st0: density code 0x8c, variable blocks, write-enabled

Has anyone seen this problem before or have any suggestions as to how I may fix 
it?

Cheers,
Marcus

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