From owner-freebsd-questions  Fri Jan 16 01:38:44 1998
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Date: Fri, 16 Jan 1998 09:01:40 +0000
From: Karl Pielorz <kpielorz@tdx.co.uk>
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To: Ron Rosson <insane@oneinsane.net>
CC: questions@FreeBSD.ORG
Subject: Re: SCSI Tape Drive Error
References: <3.0.5.32.19980115204926.007d9100@the.oneinsane.net>
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Sounds like it could be a termination problem. If the tape is the only device
on the chain make sure the controller is terminated, and the tape drive is
terminated.

Make sure the cables are good quality, and short - In the bios on the 2940 try
setting it to 'Allow Sync. Negotiation: No'.

See if the Tape driver has a jumper for 'Termination Power', and see whether
it's on or off (I think it should be Off for such a small bus, but try it 'On'
as well)...

We have had very similar messages here when our Termination has been off...

Hope that helps,

Regards,

Karl

Ron Rosson wrote:
> 
>   This is an error I get when I am testing a tape.
> Using the following command like a verify:
> 
> tar tvf /dev/rst0 > <filename>
> 
> Filename gets compared to backup log of original time and
> day of backup for accuracy of log and tape.
> 
> Jan 12 22:43:19 the /kernel: st0(ahc0:4:0): SCB 0x0
> - timed out while idle, LAST PHASE == 0x1, SCSISIGI == 0x0
> Jan 12 22:43:19 the /kernel: SEQADDR = 0x8 SCSISEQ = 0x12
> SSTAT0 = 0x5 SSTAT1 = 0xa
> Jan 12 22:43:19 the /kernel: st0(ahc0:4:0): Queueing an Abort SCB
> Jan 12 22:43:19 the /kernel: st0(ahc0:4:0): Abort Message Sent
> Jan 12 22:43:19 the /kernel: st0(ahc0:4:0): SCB 0 - Abort Completed.
> Jan 12 22:43:19 the /kernel: st0(ahc0:4:0): no longer in timeout
> Jan 12 22:44:59 the /kernel: st0(ahc0:4:0): SCB 0x0

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