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Date:      Wed, 22 Mar 2006 16:20:31 -0000
From:      "Frank Mitchell" <mitchell@cloudynwuk.force9.co.uk>
To:        <matteo@freebsd.org>
Cc:        h.eichmann@gmx.de, freebsd-qa@freebsd.org
Subject:   bin_48341 & Dual-Booting
Message-ID:  <000001c64ddb$6bafd5a0$f5d8ae51@hal>

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Dear Matteo Riondato,

Further investigation confirms two problems related to Heiner's.

For Dual Booting with Windows Me I needed to retain my LBA Disk Geometry,
as originally auto-detected by BIOS. This means 1023 Logical Cylinders and
64 Logical Heads, also given by Slackware fdisk.

But FreeBSD-6.0 accepts the Default Logical Geometry supplied by the ATA
Identify Drive Command, which means 4092 Logical Cylinders and 16 Logical
Heads. The sysinstall fdisk in FreeBSD-6.0 sets up this CHS Geometry even
when the desired LBA CHS Translation Geometry is specified in the BIOS, and
even when the FreeBSD Partition was already set up for LBA CHS Geometry
previously. You need to be aware of the need for the fdisk "G" option every
time.

Being new to FreeBSD, I wanted to re-run sysinstall a few times without
disturbing my Windows Me boot set-up. So I chose the "Boot Manager = None"
Option, intending to leave the MBR untouched while I investigated the
possibility of booting from a Floppy. But I soon found my machine rebooted
into FreeBSD every time. I didn't see Windows Me again until I installed the
FreeBSD Boot Manager, which luckily dual-booted okay. (Windows Me gave
problems using Lilo).

One fact may or may not be significant. My BIOS had the Boot Sector Virus
Warning Enabled. Now every time I reboot with FreeBSD Boot Manager I get a
bleep alarm and a Message Box saying: "Award BIOS WARNING!!! Disk Boot
Sector is to be modified. Type "Y" to accept, any key to abort." I never got
that with the "Boot Manager = None" Option, even though the Boot Setup was
obviously changed.

Yours Truly: Frank Mitchell










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