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Date:      Thu, 15 Jun 2000 23:35:29 -0600
From:      "Kenneth D. Merry" <ken@kdm.org>
To:        Kevin Day <toasty@dragondata.com>
Cc:        freebsd-scsi@FreeBSD.ORG
Subject:   Re: Bus resets appearing on wrong scsi busses?
Message-ID:  <20000615233529.A49174@panzer.kdm.org>
In-Reply-To: <200006152306.SAA56932@celery.dragondata.com>; from toasty@dragondata.com on Thu, Jun 15, 2000 at 06:06:12PM -0500
References:  <200006152306.SAA56932@celery.dragondata.com>

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On Thu, Jun 15, 2000 at 18:06:12 -0500, Kevin Day wrote:
> 
> I've got a system with many(7) SCSI busses. One bus has nothing other than a
> tape drive and autoloader. When I eject the tape from drive, it executes
> correctly, but I get:
> 
> # camcontrol eject 3:1:0
> Unit stopped successfully, Media ejected
> (pass7:ahc1:0:0:0): SCB 0xd - timed out while idle, SEQADDR == 0xa
> ahc1: Issued Channel A Bus Reset. 1 SCBs aborted
> 
> Which really makes no sense, considering I wasn't talking to that device:
> 
> # camcontrol devlist
> *snip*
> <EXABYTE Exabyte EZ17 1.06>        at scbus3 target 0 lun 0 (pass7,ch0)
> <EXABYTE EXB-89008E00012F V41b>    at scbus3 target 1 lun 0 (sa0,pass8)
> *snip*
> 
> Then, another random scsi bus (even on a different card) will reset:
> 
> (noperiph:sym1:0:-1:-1): SCSI BUS reset delivered.
> 
> 
> Has anyone seen anything like this? dmesg follows:

That does seem rather odd.

What happens if you type:

camcontrol inquiry 3:1:0 -v

Also, did you happen to rescan the bus to get the tape drive to appear?
Typically the pass device is the first to attach.

How long after you attempt to eject the tape does the timed out while idle
message appear?

Were you doing any changer operations at the same time?

Is the behavior consistent?

Also, why are you using camcontrol to eject the tape instead of 'mt offline'?

Ken
-- 
Kenneth Merry
ken@kdm.org


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