Date: Fri, 1 Dec 2000 16:57:12 +0200 (SAST) From: Robert Nordier <rnordier@nordier.com> To: jose@we.lc.ehu.es (Jose M. Alcaide) Cc: stable@FreeBSD.ORG Subject: Re: The trouble with boot0 Message-ID: <200012011457.eB1EvDQ00734@nordier.com> In-Reply-To: <3A27AF02.423BED40@we.lc.ehu.es> from "Jose M. Alcaide" at Dec 01, 2000 03:00:34 PM
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Jose M. Alcaide wrote:
> If this a geometry problem, I cannot understand why boot0 cannot
> boot from ad0s3 while there are no problems for booting from
> ad0s2, which is placed after ad0s3 and beyond the cylinder 1023.
Can you try the -current version of boot0? You can pick up both
source and binary files at
http://www.freebsd.org/~rnordier/download/boot0-latest.tar.gz
Be sure to specifically enable packet support when installing it:
boot0cfg -Bv -b $PATH_TO_BINARY -o packet ad0
The problem may be that the 4.2 boot0 uses the CHS interface where
it can, and the packet interface otherwise. The -current boot0
(and the old boot0) will always use one interface or the other,
though. I think that could account for the problem you're having.
> I am more interested on an explanation for this problem than on
> finding the solution. I found this problem while doing a
> demo for the students of the installation procedure of FreeBSD,
> so that I would like to be able to explain clearly the reason of the
> boot failure to them.
Understood. If the -current boot0 doesn't work, I'd suggest you
send along the following data and I'll think about it some more:
dd if=/dev/ad0 bs=512 count=3 >foo0
dd if=/dev/ad0 bs=512 skip=3997224 count=17 >foo1
dd if=/dev/ad0 bs=512 skip=8415792 count=17 >foo2
--
Robert Nordier
rnordier@nordier.com
rnordier@FreeBSD.org
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