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Path: euryale.cc.adfa.oz.au!newshost.anu.edu.au!harbinger.cc.monash.edu.au!news.cs.su.oz.au!inferno.mpx.com.au!news.mel.aone.net.au!imci4!newsfeed.internetmci.com!news.mathworks.com!fu-berlin.de!zrz.TU-Berlin.DE!zib-berlin.de!news.tu-chemnitz.de!irz401!uriah.heep!news From: j@uriah.heep.sax.de (J Wunsch) Newsgroups: comp.unix.bsd.freebsd.misc Subject: Re: NCR scsi boot problem Date: 13 Apr 1996 09:44:36 GMT Organization: Private BSD site, Dresden Lines: 31 Message-ID: <4knt24$hkp@uriah.heep.sax.de> References: <Dpn92q.3Bp.0.macbeth@cogsci.ed.ac.uk> Reply-To: joerg_wunsch@uriah.heep.sax.de (Joerg Wunsch) NNTP-Posting-Host: localhost.heep.sax.de Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8bit X-Newsreader: knews 0.9.3 In-Reply-To: <Dpn92q.3Bp.0.macbeth@cogsci.ed.ac.uk> To: richard@cogsci.ed.ac.uk richard@cogsci.ed.ac.uk (Richard Tobin) writes: > I just replaced my Adaptec 1542C with an NCR PCI-SC200 (NCR 810). Now > I can't boot directly from the hard disk. I had an os-bs boot sector; > it reports a missing operating system whether I choose DOS or FreeBSD. The BIOS geometry translation of Adaptec and NCR is different. > spottisvax$ fdisk sd0 > ******* Working on device /dev/rsd0 ******* > parameters extracted from in-core disklabel are: > cylinders=2006 heads=64 sectors/track=32 (2048 blks/cyl) > > The data for partition 1 is: > sysid 165,(FreeBSD/NetBSD/386BSD) > start 204800, size 3686400 (1800 Meg), flag 0 > beg: cyl 100/ sector 1/ head 0; > end: cyl 875/ sector 32/ head 63 Well, i don't know about what the NCR actually uses as its BIOS geometry. Basically, while your ``start 204800'' is the valid number, you have to convert this into the C/H/S idea your NCR BIOS has for this sector number. -- cheers, J"org joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/ -- NIC: JW11-RIPE Never trust an operating system you don't have sources for. ;-)