Date: Sun, 13 Oct 1996 23:00:37 -0700 (PDT) From: Doug White <dwhite@gdi.uoregon.edu> To: Barry Masterson <jbarrm@panix.com> Cc: Freebsd-questions <questions@FreeBSD.ORG> Subject: Re: Cylinders & heads: dmesg VS fdisk Message-ID: <Pine.BSI.3.94.961013225913.261H-100000@gdi.uoregon.edu> In-Reply-To: <Pine.BSF.3.91.961012163320.476A-100000@jbarrm.dialup.access.net>
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On Sat, 12 Oct 1996, Barry Masterson wrote: > When I run 'dmesg' & 'fdisk', the values for heads & cylinders are > different for the same disk: > > [dmesg] > wdc0: unit 0 (wd0): <QUANTUM FIREBALL1080A> > wd0: 1039MB (2128896 sectors), 2112 cyls, 16 heads, 63 S/T, 512 B/S > ^^^^^^^^^ ^^^^^^^^ > [fdisk] > ******* Working on device /dev/rwd0 ******* > parameters extracted from in-core disklabel are: > cylinders=528 heads=64 sectors/track=63 (4032 blks/cyl) > ^^^^^^^^^^^^^ ^^^^^^^^ There is translation going on. Notice the different blocks/cylinder value between the outputs. > My question is; Why is there a difference in cylinders, & heads on wd0 ; > why would dmesg & fdisk show different values? Not knowing the internals on this one, I can't say. Doug White | University of Oregon Internet: dwhite@resnet.uoregon.edu | Residence Networking Assistant http://gladstone.uoregon.edu/~dwhite | Computer Science Major
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