Axp-List Archive
Re: scsi command failure

Subject: Re: scsi command failure
From: Joerg Bruehe (joerg@sql.de)
Date: Mon Mar 12 05:29:57 2001


Hi Richard,

Richard Polton wrote:
>
> [...]
>
> I have a SCSI disk which the adapter cannot find (it used to work fine)
> >From the Ctrl-A BIOS screen, I get when trying to access this disk:
>
> Unexpected SCSI command failure
>
> Target SCSI Id: 1
> [...]
>
> Can anyone offer any advice? I have tried fiddling with the cable, the
> card, socket, terminator (active) etc. to no avail.
>
> It is AHA-2940 Ultra/Ultra-W if it makes any difference.

IF the disk is "narrow"
  AND you connected it as an "external" disk to the adapter's
      slot-backplane socket using a "wide-to-narrow" converter
THEN I recommend that you connect it to the "internal-narrow"
      pins at the converter's edge, either as an internal drive
      or using a "pins-to-slot-backplane" cable providing a narrow
      external socket on an unused slot.

Reason: I had severe problems with such a setup (narrow device
via converter on the wide external port) on an Intel PC,
I could not get it to work; the Adaptec's BIOS would never finish
a SCSI bus scan.
The separate slot-socket made it work immediately.

Regards,
Joerg Bruehe

-- 
Joerg Bruehe, SQL Datenbanksysteme GmbH, Berlin, Germany
     (speaking only for himself)
mailto: joerg@sql.de

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