StoreEver Tape Storage
cancel
Showing results for 
Search instead for 
Did you mean: 

Tape drive errors

Ayman Altounji
Valued Contributor

Tape drive errors

Hi,
Can someone help me diagnose some tape drive errors ? We have a SLR 4/8 sitting in a Compaq Proliant 400 which has an
on-board ultra-2 scsi card. The card is running a hard drive with the tape drive at the end of the chain. Termination, scsi ID's etc have been checked to within an inch of their life, hard drive ID 0 and tape drive ID 4, The drives are detected at boot and diagnostics all run OK.

Reasonably often (not always), tape operations cause the following messages:

Apr 30 09:05:10 barton kernel: ncr53c895-0-<4,*>: FAST-5 SCSI 4.0 MB/s (250 ns, offset 8)
Apr 30 09:47:31 barton kernel: ncr53c895-0: SCSI parity error detected: SCR1=65 DBC=50000000 STAT1=f
Apr 30 09:47:31 barton kernel: ncr53c895-0:4: ERROR (81:0) (8-0-0) (28/77) @ (mem fa3ee1b8:ffffffff).
Apr 30 09:47:31 barton kernel: ncr53c895-0: regdump: da 00 00 77 47 28 04 07 84 08 84 00 80 00 0f 02.
Apr 30 09:47:31 barton kernel: ncr53c895-0: have to clear fifos.
Apr 30 09:47:31 barton kernel: ncr53c895-0: restart (scsi reset).
Apr 30 09:47:31 barton kernel: ncr53c895-0: Downloading SCSI SCRIPTS.
Apr 30 09:47:31 barton kernel: ncr53c895-0-<4,*>: FAST-5 SCSI 4.0 MB/s (250 ns, offset 8)
Apr 30 09:47:31 barton kernel: st0: Error with sense data: [valid=0] Info fld=0x0, Current st09:00: sense key Unit Attention
Apr 30 09:47:31 barton kernel: Additional sense indicates Power on, reset, or bus device reset occurred
Apr 30 09:47:31 barton kernel: ncr53c895-0-<0,*>: FAST-20 WIDE SCSI 40.0 MB/s (50 ns, offset 15)

The tape operation then fai;s.

Basically, what this seems to be saying is that the scsi bus is being reset. The Tandberg does not like this. Is anyone aware of any
settings/configurations which may be causing this, or a way to fix it ? I've have the same problem with a Proliant ML330. This server has an SLR24 (ID 4) and 2 hard drives (ID 0 and ID 1).

As suggested by various people and support groups I have tried: replacing the SLR 24 drive
replacing tapes
retensioning and erasing tapes before each use.
Without any success.

I believe the problem is the SCSI card.

Any ideas?