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Date: Fri, 21 Oct 2005 12:21:01 +0200
From: =?ISO-8859-1?Q?Bj=F6rn_K=F6nig?= <bkoenig@cs.tu-berlin.de>
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To: Mark <mark17@shaw.ca>
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Cc: freebsd-questions@freebsd.org
Subject: Re: mbr and boot disks?
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Mark wrote:

> I am currently dual booting between windows and freebsd but I need to
> reinstall windows on the other partition. How do I create a freebsd boot
> disk so that after windows rewrites my mbr I can still get back to bsd?
> Then how would I re-install freebsd's boot manager so I can continue to
> dual boot?

Hello Mark,

use disc1* of FreeBSD. Boot from CD-ROM and choose "Fixit" and then 
"CDROM/DVD" and run "boot0cfg -B /dev/ad0". That's it.

*) The live filesystem is on disc2 if you use FreeBSD 5.3 or previous 
versions.

Regards
Björn