Date: Tue, 5 Sep 2000 23:42:42 -0500 From: Lucas Bergman <iceberg@pobox.com> To: "Christopher W. Aiken" <cwaiken@telerama.com> Cc: freebsd-questions@freebsd.org Subject: Re: FreeBSD 4.1 Dual Boot Problems Message-ID: <20000905234242.B49156@comp04.prc.uic.edu> In-Reply-To: <Pine.BSI.4.02.10009032029460.2731-100000@frogger.telerama.com>; from cwaiken@telerama.com on Sun, Sep 03, 2000 at 08:31:53PM -0400 References: <Pine.BSI.4.02.10009032029460.2731-100000@frogger.telerama.com>
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> I can not boot W98 or FreeBSD. I tried to re-install 4.1 over and
> over and over but no matter what I tried I could not get 4.1 to
> write the boot loader to the mbr. [snip] As I expected FreeBSD 4.0
> did indeed install the multiple O/S boot loader. This time when I
> installed 4.1 I told it NOT to install a boot loader and, when the
> install was finished, I was able to boot W98 or FreeBSD with the 4.0
> boot loader program.
>
> What is wrong with 4.1 that it will not install the bootloader
> program to the mbr? Is this happening to anyone else?
I didn't have any trouble. But, then again, somebody else may have.
> Can I boot from the "official" CD's that I got from Walnut Creek?
Yes, with a sufficiently new computer.
> How?
It's an option in the BIOS/CMOS setup. Wherever you would go to, say,
make the hard drive boot first instead of the floppy drive, there
should be an option to boot from the ATAPI CD-ROM first. This only
exists on computers younger than about two or three years.
> If I can boot from the CD's, can I force the the re-write of the
> multiple O/S boot loader to be written to the mbr?
Yes.
> How?
Boot from the first CD. Then choose the FIXIT option from
sysinstall. Insert the second CD when it asks, and jump over to the
fixit shell with <Alt>-<F4>. From the shell, mount your FreeBSD drive
# mount /dev/ad0s2 /mnt
or whatever. Then, you can refresh the MBR with
# chroot /mnt
# mount -a
# /usr/sbin/boot0cfg -Bv ad0
Of course, check boot0cfg(8) for details. The `mount -a' step is, of
course, unnecessary if your /usr is on the same partition as /.
Lucas
--
S. Lucas Bergman
Northwestern University
Mathematics Department
PGP Public Key (0xC0C73619):
http://pobox.com/~iceberg/pgpkey.html
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