From owner-freebsd-hackers@FreeBSD.ORG  Tue Apr  4 10:40:40 2006
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Date: Tue, 4 Apr 2006 20:40:31 +1000
From: Peter Jeremy <peterjeremy@optushome.com.au>
To: Khaled Hussain <khaled@ipbill.com>
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Cc: FreeBSD Hackers <freebsd-hackers@freebsd.org>
Subject: Re: cloning a FreeBSD HDD
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On Tue, 2006-Apr-04 11:12:03 +0100, Khaled Hussain wrote:
>Why does everyone talk about dump+restore as a pair? I thought it was
>possible just to dump a filesystem to a different hard disk i.e.
>dump -0a -f /dev/ad2 /

It is.  But /dev/ad2 will have a dumpfile on it, not a filesystem.
The only thing that can then read /dev/ad2 is restore.

>Also, how can I find out which /boot/boot# file a freebsd system is using by
>default?

None of the ones in the filesystem - these files are embedded into the
beginning of the hard disk.

One of boot0, boot0sio or mbr is located in absolute sector 0 of the disk.
boot1 is located in sector 0 of the bootable slice
boot2 is located in the (I think) sectors 1-15 of partition a.

-- 
Peter Jeremy