aic7880 problem talking to CD-R

[Doug Ledford]

Michael Poole wrote:

>         The RedHat aic7xxx driver with kernel 2.0.32 is the most verbose
> when the error occurs; under aic7xxx-5.0.7, I get one line:
> scsi0: Target 5, channel A, refusing WIDE negotiation; using 8 bit
> transfers.
> (or something to that effect) and then the machine just sits there.  With
> the RedHat-supplied aic7xxx driver, I get that line, plus:
> scsi0: Channel reset, sequencer restarted
> (scsi0:5:0) Aborting scb 0
> (and more errors about Abort_Reset messages from device 5, which is the
> CD-R; they scroll rather quickly, but if they'd be helpful, I can copy
> them down verbatim), and then something about trying harder to reset; the
> messages repeat.
> 
>         If that were the extent of my experience with the drive, I'd chalk
> it up to a flakey CD-R.  However, the drive did work and has been used to
> burn CDs in a (different) Windows 95 machine using an AHA-2940
> dual-channel narrow SCSI-2 controller without any difficulties setting it
> up.  The only real difference I notice between the two (unless the chipset
> is different in some way I don't know about) is that my motherboard
> supports wide SCSI and is using it and the other machine is narrow-only.
> 
>         Does anyone have suggestions as to what I can try to do to make
> this work, or at least find out if it's a problem with the CD-R's firmware
> and I should scream at Matsushita/Panasonic?

Try going into the Adaptec SCSI BIOS (the CTRL-A message at bootup) and
disabling wide negotiation on the CD-R.  It seems like the CD-R firmware
might be getting confused after we attempt to negotiate for wide transfers.

-- 

 Doug Ledford  <dledford at dialnet.net>
  Opinions expressed are my own, but
     they should be everybody's.

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