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Newsgroups: comp.periphs.scsi,comp.unix.bsd.freebsd.misc Path: euryale.cc.adfa.oz.au!newshost.anu.edu.au!harbinger.cc.monash.edu.au!simtel!news.kei.com!news.mathworks.com!newsfeed.internetmci.com!howland.reston.ans.net!xlink.net!news.ppp.de!news.Hanse.DE!wavehh.hanse.de!cracauer From: cracauer@wavehh.hanse.de (Martin Cracauer) Subject: Re: PCI 2940 Config (and NCR) Message-ID: <1995Sep3.134248.26342@wavehh.hanse.de> Organization: The Internet References: <4298im$h4@trauma.rn.com> <42abn3$mkv@crl.crl.com> Date: Sun, 3 Sep 95 13:42:48 GMT Lines: 41 Xref: euryale.cc.adfa.oz.au comp.periphs.scsi:36772 comp.unix.bsd.freebsd.misc:5524 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. >> >>larry >> >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. >NCR 810 wont boot from disk when it was FDISK'ed with 2940 and vice versa.. 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. I usually make the first fdisk for every harddrive under MS-DOS and 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. -- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% Martin Cracauer <cracauer@wavehh.hanse.de>. No NeXTMail, please. Norderstedt/Hamburg, Germany. Fax +49 40 522 85 36. This is a private address. At (netless) work programming in data analysis.