SCSI tape drive...

[Peter Elsner]

For the past 3 weeks, I noticed that my backup has been failing.

This is part of what I see in the /var/log/messages file.

Jun 16 18:26:02 chuck /kernel: ahc0: Bus Device Reset on A:3. 1 SCBs aborted
Jun 16 18:26:03 chuck /kernel: (sa0:ahc0:0:3:0): unable to rewind after 
test rea
d
Jun 16 18:27:12 chuck /kernel: (sa0:ahc0:0:3:0): WRITE FILEMARKS. CDB: 10 0 0 0
2 0
Jun 16 18:27:12 chuck /kernel: (sa0:ahc0:0:3:0): MEDIUM ERROR asc:c,0
Jun 16 18:27:12 chuck /kernel: (sa0:ahc0:0:3:0): Write error
Jun 16 18:27:12 chuck /kernel: (sa0:ahc0:0:3:0): failed to write 
terminating fil
emark(s)
Jun 16 18:30:00 chuck /kernel: (sa0:ahc0:0:3:0): WRITE FILEMARKS. CDB: 10 0 0 0
2 0
Jun 16 18:30:00 chuck /kernel: (sa0:ahc0:0:3:0): MEDIUM ERROR asc:c,0
Jun 16 18:30:00 chuck /kernel: (sa0:ahc0:0:3:0): Write error
Jun 16 18:30:00 chuck /kernel: (sa0:ahc0:0:3:0): failed to write 
terminating fil
emark(s)


Jun 16 18:39:17 chuck /kernel: <<<<<<<<<<<<<<<< Dump Card State 
Ends >>>>>>>>>>>
 >>>>>>>
Jun 16 18:39:17 chuck /kernel: sg[0] - Addr 0x4344000 : Length 4096
Jun 16 18:39:17 chuck /kernel: sg[1] - Addr 0x3d65000 : Length 4096
Jun 16 18:39:17 chuck /kernel: sg[2] - Addr 0x3fe6000 : Length 2048
Jun 16 18:39:17 chuck /kernel: (sa0:ahc0:0:3:0): Queuing a BDR SCB
Jun 16 18:39:17 chuck /kernel: (sa0:ahc0:0:3:0): Bus Device Reset Message Sent
Jun 16 18:39:17 chuck /kernel: (sa0:ahc0:0:3:0): no longer in timeout, status =
34b
Jun 16 18:39:17 chuck /kernel: ahc0: Bus Device Reset on A:3. 1 SCBs aborted
Jun 16 18:39:18 chuck /kernel: (sa0:ahc0:0:3:0): tape is now frozen- use an 
OFFL
INE, REWIND or MTEOM command to clear this state.


I thought it was bad tapes, so I replaced them.  Same result.
So I replaced the tape drive, cable and SCSI card.
Still no joy.

It's an Adaptec 2940 and a Travan 5 SCSI 10/20 gig drive.

This same set up has worked for 3 years without problem.


It finally occurred to me (just a few minutes ago), that 3 weeks ago,
is about the time I upgraded from 4.7-STABLE to 4.8-STABLE.

Is it possible that the ahc driver is broken?

Any help on this would be greatly appreciated...

Thanks in advance,

Peter



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Peter Elsner - FreeBSD SysAdmin
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