Date: Tue, 27 May 1997 13:06:51 +0200 From: Stefan Esser <se@FreeBSD.ORG> To: Marc Slemko <marcs@znep.com> Cc: Dave Huang <khym@bga.com>, freebsd-scsi@FreeBSD.ORG, current-users@netbsd.org Subject: Re: ncr driver working well with 53c875? Message-ID: <19970527130651.56313@x14.mi.uni-koeln.de> In-Reply-To: <Pine.BSF.3.95.970526213857.9988A-100000@alive.znep.com>; from Marc Slemko on Mon, May 26, 1997 at 09:45:54PM -0600 References: <Pine.BSI.3.96.970526170647.9159A-100000@urchin.bga.com> <Pine.BSF.3.95.970526213857.9988A-100000@alive.znep.com>
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On May 26, Marc Slemko <marcs@znep.com> wrote: > I have run both a DC-390U (ultra) and a DC-390F (ultra wide) under FreeBSD > without any real problems. The U isn't wide, but still uses the 875 > chipset. > > Note that the Tekram's BIOS doesn't like disks partitioned using FreeBSD's > dedicated mode and will hang on boot if it sees one. Well, it will write a nasty complaint, and will pause for some 10 seconds, but will eventually continue the SCSI bus scan ... > The only problem I had was when attaching a wide drive to the narrow > controller (390U) , the code kept thinking it could talk over a wide bus > (the chip on the contoller is a 875, which is wide, the drive is wide, but > the connection is narrow) and blew up horribly. To work around this I > just used the appropriate define to force the NCR driver to only talk > narrow. There is not much that can be done about the problem of WIDE drives connected to a WIDE host adapter with an 8bit SCSI cable. The driver should fall back to non-WIDE mode if WIDE transfers fail because of the cable, but I have never tested that feature. One more point for the ToDo list ... :) Regards, STefan
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