Exabyte hanging SCSI ...

[Douglas Chan]

Our 8mm Exabyte is causing problems for other SCSI devices (two Wren V
drives and a 1/4" tape drive) on a sun 4/380 running 4.0.3.  The problem
only seems to show up when the drives are being accessed and large dumps
are being made to the Exabyte.  The errors are as follows:

vmunix: sd0:  sdtimer: I/O request timeout
vmunix:	Snap shot(HEX): state= 12, err= 0, stat= 1, int= 10, substate= 4
vmunix: 	ESP xcnt_lo= 0, hi= 2, cmd= 90, cur_target= 0
vmunix: 	flag= 80, stat= 1, step= dc, int= 0
vmunix: 
vmunix: 	num_dis_target= 0  scsi_stat= 0  scsi_msg= 81
vmunix: 	DVMA_stat= 310, addr= fff20e00
vmunix: 	target= 0, lun= 0    DMA addr= 1f000  count= 1000 (2000)
vmunix: 	cdb=    8  0  af  30  10  0
vmunix: sd0c:  read retry, blk 44848 (rel. blk 44848)
vmunix:        sense key(0x0): no sense

Anyway, this happens for about 30 minutes then all the SCSI devices hang.
Any processes which has to use any of the devices will also hang (they
can't be killed either).

Is this a SCSI driver problem?  I've checked old issues of Sun-spots and
found quite a few similar problems but I can't seem to find replies to
them!

-Doug
apollo at raven.bu.edu