From owner-freebsd-stable  Wed Mar 24 16:21:54 1999
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Date: Thu, 25 Mar 1999 00:59:36 +0100
From: Stefan Esser <se@mi.uni-koeln.de>
To: Oyvind Moll <oyvindmo@pvv.ntnu.no>
Cc: freebsd-stable@freebsd.org, Stefan Esser <se@freebsd.org>
Subject: Re: SCSI hangs/timout, ncr53C8xx, 3.1-STABLE
Message-ID: <19990325005936.A439@dialup124.mi.uni-koeln.de>
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References: <dslyakmn7o1.fsf@apollo.orakel.ntnu.no>
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In-Reply-To: <dslyakmn7o1.fsf@apollo.orakel.ntnu.no>; from Oyvind Moll on Wed, Mar 24, 1999 at 06:01:34PM +0100
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On 1999-03-24 18:01 +0100, Oyvind Moll <oyvindmo@pvv.ntnu.no> wrote:
> I run 3.1-STABLE with kernel and world built from source cvsupped
> 1999-03-04.
> 
> My problem: I try to dump an audio-CD from a Philips CDD2600
> CD-R-drive (using tosha).  Three of the about ten times that I've
> tried to dump a CD, tosha would suddenly report "SCSI read/write
> error" or something (sorry, forgot to write that one down) and I would
> get messages like these on my console:

Sorry, you do not give enough detail, but what you see might be
caused by too short a timeout being specified with some SCSI 
command. Your best bet is to enable SCSI debugging (see option
CAMDEBUG and information supplied in /sys/cam/cam_debug.h for
more information. You probably want to try

options		"CAMDEBUG=CAM_DEBUG_INFO"

in your kernel config file ...

You will then be able to follow the flow of commands sent to the
CD-R drive. The last command issued before the error messages 
appear is the one that causes the trouble. Let me know what you
find. (But I'm on a 10 day vacation from Friday on, so don't 
expect a reply during that time ;-)

Regards, STefan


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