*BSD News Article 96531


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From: "J.C. Archambeau" <n-xiv@worldnet.att.net>
Newsgroups: comp.unix.bsd.freebsd.misc
Subject: Re: strange message from SCSI ahc driver at boot
Date: 30 May 1997 17:46:33 GMT
Organization: AT&T WorldNet Services
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Jose M. Alcaide <jose@we.lc.ehu.es> wrote:

: > Did you try disabling wide negotiation for SCSI ID 5 from
SCSISelect?
: > Some narrow devices complain if the adapter attempts wide
negotiation
: > and you get strange results.  Your Seagate may be functioning in
wide
: > mode and the error message is applicable to your CD-ROM drive.

: I have received the following message from Ron Bolin
<rlb@mindspring.com>:
: 
: :This is normal. I have the same similar system. It just means that
the
: :CD is 8 bit. Boot using -v option and you will see 16 bit for the
disk.
: 
: Sure. Booting with -v showed that transfers with the HD are 16-bit
: wide. Anyway, I would like to know what "ahc:0:A:5" means. At least,
: it's a somewhat confusing message.

It is probably an ambigious error message from the ahc driver trying
to negotiate a wide transfer with your CD-ROM drive which causes the
confusing error message.  It is quite common in a wide SCSI bus with
both narrow and wide devices for unpredicable results like this to
occur which is why Adaptec and Buslogic have their respective onboard
utilities to configure each device on your SCSI bus.  Disable wide
negotiation from SCSISelect for SCSI ID 5 and see if it corrects the
problem.  As a rule of thumb, I always configure each device on my
SCSI bus from Adaptec's SCSISelect or Buslogic's Auto-SCSI.

 JCA
--
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