Adaptec 2940 with /ET hangs on bootup with HP IIc scanner. Help!

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3 total messages Started by Tony Addyman Wed, 13 Mar 1996 00:00

#90

Author: Tony Addyman
Date: Wed, 13 Mar 1996 00:00

22 lines
1652 bytes

Problem: Pentium + Adaptec 2940 card with Pioneer 604X CD-changer and HP
IIc scanner on the SCSI chain (together with a Panasonic optical drive). If
the /ET parameter is set on the driver all 6 CDs are seen, but the system
hangs on bootup if the scanner is powered on. If the /ET parameter is
omitted the scanner can be used, but only one CD is available. Any ideas
folks?

Background: I used to have a 486 + 1542B driving the SCSI chain and this 
was able to support all 6 CDs in the Pioneer and the scanner at the same 
time. I have tried looking at the SCSI cables with some diagnostic 
connectors and there appears to be a request outstanding. My guess is that
the driver is interrogating the scanner concerning all its internal LUNs 
and is not getting a suitable answer.
TIA
Tony Addyman


Tony Addyman (The man from the AA)
Dept of Mathematics and Computer Science
University of Salford
Salford
UK

Re: Adaptec 2940 with /ET hangs on bootup with HP IIc scanner. Help!

#89

Author: Bruce Ferry
Date: Wed, 13 Mar 1996 00:00

25 lines
1878 bytes

Tony Addyman wrote:
> 
> Problem: Pentium + Adaptec 2940 card with Pioneer 604X CD-changer and HP
> IIc scanner on the SCSI chain (together with a Panasonic optical drive). If
> the /ET parameter is set on the driver all 6 CDs are seen, but the system
> hangs on bootup if the scanner is powered on. If the /ET parameter is
> omitted the scanner can be used, but only one CD is available. Any ideas
> folks?
> 
> Background: I used to have a 486 + 1542B driving the SCSI chain and this
> was able to support all 6 CDs in the Pioneer and the scanner at the same
> time. I have tried looking at the SCSI cables with some diagnostic
> connectors and there appears to be a request outstanding. My guess is that
> the driver is interrogating the scanner concerning all its internal LUNs
> and is not getting a suitable answer.
> TIA

A couple of things you can try to setup on the 2940 BIOS:

1. Disable SYNC Negotiation. Try it on your CD changer first, then the scanner.

2. Slow down the transfer rate to the scanner. You can slow down the CD too without any real loss 
in performance.

Both of these things are SOP for SCSI DAT tape drives.

Re: Adaptec 2940 with /ET hangs on bootup with HP IIc scanner. Help!

#88

Author: Ing
Date: Sun, 17 Mar 1996 00:00

28 lines
1830 bytes

I had a similar problem.  I found that I had it only if I had a device
that used SCSI ID#6.  Might check to see if any of your devices use
that address?

In <4i66bp$q4d@io> Anthony_M_Addyman@notes.salford.ac.uk      (Tony Addyman) writes:

>Problem: Pentium + Adaptec 2940 card with Pioneer 604X CD-changer and HP
>IIc scanner on the SCSI chain (together with a Panasonic optical drive). If
>the /ET parameter is set on the driver all 6 CDs are seen, but the system
>hangs on bootup if the scanner is powered on. If the /ET parameter is
>omitted the scanner can be used, but only one CD is available. Any ideas
>folks?

>Background: I used to have a 486 + 1542B driving the SCSI chain and this 
>was able to support all 6 CDs in the Pioneer and the scanner at the same 
>time. I have tried looking at the SCSI cables with some diagnostic 
>connectors and there appears to be a request outstanding. My guess is that
>the driver is interrogating the scanner concerning all its internal LUNs 
>and is not getting a suitable answer.
>TIA
>Tony Addyman


>Tony Addyman (The man from the AA)
>Dept of Mathematics and Computer Science
>University of Salford
>Salford
>UK

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