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Path: euryale.cc.adfa.oz.au!newshost.anu.edu.au!harbinger.cc.monash.edu.au!simtel!news.sprintlink.net!in1.uu.net!rn.com!not-for-mail From: larry@rn.com (Larry Snyder) Newsgroups: comp.periphs.scsi,comp.unix.bsd.freebsd.misc Subject: Re: PCI 2940 Config (and NCR) Date: 4 Sep 1995 11:27:53 -0400 Organization: Larry's Internet Server at home Lines: 51 Message-ID: <42f5tp$ca@trauma.rn.com> References: <4298im$h4@trauma.rn.com> <42abn3$mkv@crl.crl.com> <1995Sep3.134248.26342@wavehh.hanse.de> NNTP-Posting-Host: rn.com Xref: euryale.cc.adfa.oz.au comp.periphs.scsi:36533 comp.unix.bsd.freebsd.misc:5329 In article <1995Sep3.134248.26342@wavehh.hanse.de>, Martin Cracauer <cracauer@wavehh.hanse.de> wrote: >ggrant@crl.com (Gary E. Grant) writes: > >>In article <4298im$h4@trauma.rn.com>, Larry Snyder <larry@rn.com> wrote: >>>I recently installed a 2940 Host Adapter in my machine and am using >>>the default settings including "Extended DOS translation for drives >>>greater than 1 Gig = Enabled". I have a 2 gig SCSI drive with a 400 >>>meg partition (the first partiion) as DOS, a 1400 meg BSD partition >>>(FreeBSD 2.0.5) and the 3rd partition is FreeBSD swap. >>> >>>The motherboard is an Opti Chipset P100 with 32 megs of RAM. The >>>2940 Bios is 1.11. >>> >>>Shouldn't I be able to install the NCR host adapter by just plugging it >>>in the PCI slot on the MB? The machine won't boot completely and acts >>>like it's having problems with sector translation. How does the NCR >>>handle drives larger than 1 gig? This isn't mentioned anywhere in >>>the documentation. >>I suspect that that problem is: Adaptec & NCR use slightly different >>low=level format programs and the boot block format is not the same. What >>that means that you need to dump the disk to tape, re-fdisk the disk and >>the reload from the tape. I too have 2940 as well as NCR 810/825 controllers. Using which controller to re-fdisk the drive (2940 or NCR) - and second, just I keep the "Extended DOS translation for drives greater than 1 GIG enabled?" >This can be true, but doesn't have to. I can use the same partitions >both with NCR and AHA and can boot both by just exchanging the >drive. could it be related to the BIOS translation of the disk geometry? The Adaptec by default has something like disk translation enabled for drives over 1 GIG which I've left alone.. >later modify the label under a UNIX system. This way, I can be sure >to have disk geometry at least in a defined way. As I said, this way I >can use the same partitioning both for AHA and NCR under FreeBSD. This >didn't work when I used FreeBSD-2.0.5-install to guess geometry. My first 400 megs is DOS, and I can boot DOS just fine using either controller. When I try to boot FreeBSD using the NCR, it boots but dies when checking the file system. FreeBSD resides on the last 1400 megs of the drive.. I'm beginning to think I need to disable the "Bios translation for drives greater than 1 gig" with is by default enabled with the 2940.