Date: Tue, 24 Jan 1995 17:03:24 -0500 From: L Jonas Olsson <ljo@amcell2.caisr.cwru.edu> To: phk@ref.tfs.com Cc: terry@cs.weber.edu, bde@zeta.org.au, freebsd-hackers@freefall.cdrom.com, kuku@gilberto.physik.rwth-aachen.de Subject: Re: disklabel (1.1.5.1), partitions Message-ID: <199501242203.RAA08717@amcell2.caisr.cwru.edu> In-Reply-To: <199501242138.NAA22208@ref.tfs.com> (message from Poul-Henning Kamp on Tue, 24 Jan 1995 13:38:13 -0800 (PST))
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From: Poul-Henning Kamp <phk@ref.tfs.com> Date: Tue, 24 Jan 1995 13:38:13 -0800 (PST) Cc: bde@zeta.org.au, freebsd-hackers@freefall.cdrom.com, kuku@gilberto.physik.rwth-aachen.de Content-Type: text Content-Length: 1085 Sender: hackers-owner@FreeBSD.org Precedence: bulk <...> The problem is that you will get newfs into some strange corners if you report for instance 255 heads, as most of the ">1GB" stuff does... It is possible to use this geometry. I have one here (aic6360 controller on ZEOS MB): dumpfs /dev/sd0a gives: magic 11954 format dynamic time Mon Jan 11 22:26:27 1988 nbfree 637 ndir 58 nifree 7206 nffree 2 ncg 1 ncyl 2 size 4016 blocks 3761 bsize 8192 shift 13 mask 0xffffe000 fsize 4096 shift 12 mask 0xfffff000 frag 2 shift 1 fsbtodb 3 cpg 16 bpg 16065 fpg 32130 ipg 7872 minfree 10% optim time maxcontig 1 maxbpg 2048 rotdelay 4ms headswitch 0us trackseek 0us rps 60 ntrak 255 nsect 63 npsect 63 spc 16065 trackskew 0 interleave 1 nindir 2048 inopb 64 nspf 8 sblkno 4 cblkno 6 iblkno 8 dblkno 254 sbsize 4096 cgsize 8192 cgoffset 8 cgmask 0xffffff00 csaddr 254 cssize 4096 shift 9 mask 0xfffffe00 cgrotor 0 fmod 0 ronly 0 Note that fragment size (fsize) has to be 4096 to get past newfs. This machine is also not very stable, so perhaps the 255 head geometry should be avoided. This is with FreeBSD 1.1. Jonas
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