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Path: euryale.cc.adfa.oz.au!newshost.anu.edu.au!harbinger.cc.monash.edu.au!news.cs.su.oz.au!metro!metro!news.nsw.CSIRO.AU!mel.dit.csiro.au!munnari.OZ.AU!spool.mu.edu!howland.reston.ans.net!newsfeed.internetmci.com!news.mathworks.com!fu-berlin.de!zib-berlin.de!narses.hrz.tu-chemnitz.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: SCSI problems performing writes to FAST SCSI-2 drives Date: 21 Feb 1996 00:39:45 GMT Organization: Private BSD site, Dresden Lines: 47 Message-ID: <4gdpkh$hb3@uriah.heep.sax.de> References: <4fqnbb$f7v@viking.ucsalf.ac.uk> <4fr9rr$t4i@atlas.uniserve.com> <DMu12y.ApB@flatlin.ka.sub.org> <4gd0qq$586@plato.ucsalf.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 mark@plato.ucsalf.ac.uk (Mark Powell) writes: > >I the ahc driver thinks it needs more then 256 segments for a single > >request is beyond me, though. That would mean you are handling it a > > >1MB (256 * 4KB per page) request, which is a bit to large for a partition > >table. > > Is this a bug then? There used to be bugs in the ahc driver that have been fixed recently. Maybe you are suffering from one of them. > I've been playing with this drive again today. I want to > partition it as: (using /stand/sysinstall) > 128M / ; 2048M /usr ; 64M swap ; ~1800M /home > > Disk name: sd1 FDISK Partition Editor > DISK Geometry: 4096 cyls/64 heads/32 sectors > > Offset Size End Name PType Desc Subtype Flags > > 0 32 31 - 6 unused 0 > 32 262112 262143 sd1s1 3 freebsd 165 C > 262144 4194304 4456447 sd1s2 3 freebsd 165 > 4456448 131072 4587519 sd1s3 3 freebsd 165 > 4587520 3801088 8388607 sd1s4 3 freebsd 165 Oh no! Don't assign that many slices for FreeBSD, pick just a single one! FreeBSD does sub-partition each drive (or slice in this case), right in the tradition of many unixes. If you are never going to share the drive with any other operating system, you could even start right at offset 0 and allocate the entire drive. (DOS convention forbids this, that's why you see the first FreeBSD slice starting at offset 32 above.) This is often refered to as ``dangerously dedicated'', you get it by selecting A)ll in the FDISK editor, and answering the next question with the non-default selection (i think it's ``No'', but i'm not sure offhand). -- 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. ;-)