Subject: Re: 'ncr' driver with HP drives?
To: Chris G Demetriou <>
From: Curt Sampson <>
List: port-i386
Date: 09/23/1996 07:40:56
On Mon, 23 Sep 1996, Chris G Demetriou wrote:

> Has anybody sucessfully used the 'ncr' driver (on the i386 8-) with
> (recent) HP drives?
> On the Alpha, i've tried it with a few HP C3325A's and it reports SCSI
> errors whenever the disks are accessed.  I've heard others report
> problems with 'ncr' on the Alpha as well.
> I was wondering if this was a problem only on the alpha, or if people
> using 'ncr' on the i386 had noticed it as well.

My HP Surestore drives (on my i386) don't support tagged command
queueing. However, they claim they support it. :-)

Try a new kernel with `options SCSI_NCR_MAX_TAGS=0' in the config file.
If it works, that's the problem.

This will turn off tagged command queues for all drives. If there's
a way to set up a hint so that just a particular model of drive
will not use tagged command queuing, while others in the system
still do, I'd be interested in hearing about it.


Curt Sampson		Info at
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Vancouver, BC   (604) 257-9400		De gustibus, aut bene aut nihil.