Date: Sun, 16 Jun 2002 19:34:50 -0600 (MDT) From: "M. Warner Losh" <imp@village.org> To: grog@FreeBSD.ORG Cc: hans@lambermont.dyndns.org, freebsd-stable@FreeBSD.ORG, freebsd-fs@FreeBSD.ORG Subject: Re: fdisk seems broken for slices above cyl 1023 Message-ID: <20020616.193450.124991810.imp@village.org> In-Reply-To: <20020616233233.GC56375@wantadilla.lemis.com> References: <20020616232401.C91106@moya.lambermont.dyndns.org> <20020616233233.GC56375@wantadilla.lemis.com>
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In message: <20020616233233.GC56375@wantadilla.lemis.com>
"Greg 'groggy' Lehey" <grog@FreeBSD.ORG> writes:
: On Sunday, 16 June 2002 at 23:24:01 +0200, Hans Lambermont wrote:
: > Hi,
: >
: > I'm battling with fdisk on a 20 GB disk with 4 slices.
: >
: > This is the disk:
: > ad0: 19077MB <TOSHIBA MK2018GAP> [38760/16/63] at ata0-master UDMA100
: > On FreeBSD 4.6-RC #1: Sun Jun 16 2002
: > Fdisk translates the geometry to : cylinders=2584 heads=240
: > sectors/track=63 (15120 blks/cyl)
: >
: > This disk was partitioned during sysinstal in 4 slices:
: > /dev/ad0s1 Suspend to Disk, 0.3 GB
: > /dev/ad0s2 FreeBSD slice 1, 8.3 GB
: > /dev/ad0s3 FreeBSD slice 2, 8.3 GB
: > /dev/ad0s4 other, 2.4 GB
: > (etc)
: > Still 124 ?!
: >
: > This is seriously wrong. This looks like an fdisk bug to me.
:
: Yes, correct. fdisk truncates the cylinder number to 10 bits. I
: looked at the code a couple of days ago, but it's such a mess that the
: best thing to do would be to throw it away and start again, possibly
: importing something from NetBSD or OpenBSD.
This is not a bug, but rather the correct way to set things up with pc
hardware. The MBR requires stupid things like this :-(.
I'd love to import another fdisk too, ours really is a mess.
Warner
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