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Date:      Tue, 9 May 2000 15:42:30 +0100 (BST)
From:      Jan Grant <Jan.Grant@bristol.ac.uk>
To:        Doug Wellington <ddw@NSMA.Arizona.EDU>
Cc:        freebsd-scsi@freebsd.org, freebsd-questions@freebsd.org
Subject:   Re: Problems with 36GB SCSI drives...
Message-ID:  <Pine.GHP.4.21.0005091539160.487-100000@mail.ilrt.bris.ac.uk>
In-Reply-To: <200005081950.MAA16581@cortex.NSMA.Arizona.EDU>

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On Mon, 8 May 2000, Doug Wellington wrote:

> I have a PC (550 MHZ P-III, Asus P3B-F, 256 MB) with two Adaptec 2940U2W
> boards with six IBM DMVS36V 36GB drives.  I also have a four gig internal
> SCSI drive attached to the first 2940U2W to boot from.  The goal is to use
> vinum and create a RAID5 system...

...

> I get the following messages:
> 
> (da1:ahc0:0:1:0) SCB 0x0c - timed out in Data-out phase, SSEQADDR == 0x5d
> (da1:ahc0:0:1:0) BDR message in message buffer
> (da1:ahc0:0:1:0) SCB 0x0c - timed out in Data-out phase, SSEQADDR == 0x5e
> (da1:ahc0:0:1:0) BDR message in message buffer
> (da1:ahc0:0:1:0) no longer in timeout, status = 34b
> ahc0: Issued Channel A Bus Reset. 4 SCBs aborted

...

> What gives?  Anybody have any ideas?

I'd look very closely at the physical setup: particularly termination.

The Adaptec boards do autodetection for termination settings and
suchlike; I've seen this cause trouble before. Drop into the Adaptec
BIOS on boot using ^A and try setting the termination settings
explicitly (internal and external) for both boards.


-- 
jan grant, ILRT, University of Bristol. http://www.ilrt.bris.ac.uk/
Tel +44(0)117 9287163 Fax +44 (0)117 9287112 RFC822 jan.grant@bris.ac.uk
Unfortunately, I have a very good idea how fast my keys are moving.



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