Subject: Re: NCR Driver Lossage in sys/dev/pci/ncr.c 1.55
To: Curt Sampson <>
From: Jukka Partanen <>
List: current-users
Date: 02/17/1997 02:24:23
Curt Sampson writes:
> Perry, Dave,
> This change from 1.54 to 1.55 broke something on my system. I've
> got an NCR 53c810 attached to an HP Surestore, a Quantum Lightening,
> and an IBM drive.  The HP's always given me problems until recently,
> especially with tagged command queuing, but at least with 1.54
> below it seemed to work fine. 1.55 breaks it real bad; the system
> probes ok but when it tries to mount the root filesystem I get a
> whole lot of `command aborted' with data of all zeros.
> If you guys don't have any suggestions, I'm going to try to find this
> the hard way, which means the following:

	Try setting NCR_SCSI_MAX_TAGS (or something like that) to 0.
	Some HP SCSI drives (we have C3725S drives) don't handle
	tagged commands properly. I have a patched ncr.c which has a
	quirk entry for this drive and it works ok. Disabling tagged
	commands altogether should also do the trick.


..  I don't know why but, suddenly, I want to discuss declining I.Q.
 LEVELS with a blue ribbon SENATE SUB-COMMITTEE!