Date: Mon, 17 Jun 2002 23:30:47 +0200 From: Gerhard Sittig <Gerhard.Sittig@gmx.net> To: freebsd-stable@FreeBSD.ORG Subject: Re: fdisk seems broken for slices above cyl 1023 Message-ID: <20020617233047.Z1494@shell.gsinet.sittig.org> In-Reply-To: <20020617095241.A51682@moya.lambermont.dyndns.org>; from hans@lambermont.dyndns.org on Mon, Jun 17, 2002 at 09:52:41AM %2B0200 References: <20020616233233.GC56375@wantadilla.lemis.com> <20020617125915.H3073-100000@gamplex.bde.org> <20020617095241.A51682@moya.lambermont.dyndns.org>
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On Mon, Jun 17, 2002 at 09:52 +0200, Hans Lambermont wrote:
>
> Bruce Evans wrote:
>
> > On Mon, 17 Jun 2002, Greg 'groggy' Lehey wrote:
> >
> > This is correct and not a bug. C/H/S values in fdisk tables are limited
> > to 10/8/6 bits, respectively, so the best tha can be done with a 'C'
> > value larger than 1023 is truncate it mod 1024.
>
> Ok, this makes sense.
>
> > FreeBSD's fdisk(8) does this. However, over the last few years, some
> > bad hacks for clipping the CHS values have become less nonstandard,
> > and are required to satisfy some broken BIOSes. Your original fdisk
> > entries (not shown above) seem to have been created by an fdisk that
> > supports this.
>
> That's interesting then. This disk was labeled by the install procedure
> >from 4.5-R ! So I assume that the same fdisk is responsible for this.
Has it really been the 4.5-R setup software which labelled the
disk or has there been some previous software on the disk? The
point I try to make is: Did you merely "format" the drive or
was it really blank (some kind of "dd if=/dev/zero of=/dev/ad0c")
before you installed FreeBSD? Inserting boot code into an existing
(BIOS) partition table is completely different from creating a new
(BIOS) partition on a blank disk and thus entering the above values.
virtually yours 82D1 9B9C 01DC 4FB4 D7B4 61BE 3F49 4F77 72DE DA76
Gerhard Sittig true | mail -s "get gpg key" Gerhard.Sittig@gmx.net
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