From owner-freebsd-hackers  Sat May  3 10:46:39 1997
Return-Path: <owner-hackers>
Received: (from root@localhost)
          by hub.freebsd.org (8.8.5/8.8.5) id KAA06700
          for hackers-outgoing; Sat, 3 May 1997 10:46:39 -0700 (PDT)
Received: from rover.village.org (rover.village.org [204.144.255.49])
          by hub.freebsd.org (8.8.5/8.8.5) with SMTP id KAA06691
          for <hackers@freebsd.org>; Sat, 3 May 1997 10:46:31 -0700 (PDT)
Received: from rover.village.org [127.0.0.1] 
	by rover.village.org with esmtp (Exim 1.60 #1)
	id 0wNiso-0000L4-00; Sat, 3 May 1997 11:46:06 -0600
To: Jason Thorpe <thorpej@nas.nasa.gov>
Subject: Re: Mounting other people's disks? 
Cc: Bruce Evans <bde@zeta.org.au>, hackers@freebsd.org
In-reply-to: Your message of "Sat, 03 May 1997 09:41:31 PDT."
		<199705031641.JAA04537@lestat.nas.nasa.gov> 
References: <199705031641.JAA04537@lestat.nas.nasa.gov>  
Date: Sat, 03 May 1997 11:46:06 -0600
From: Warner Losh <imp@village.org>
Message-Id: <E0wNiso-0000L4-00@rover.village.org>
Sender: owner-hackers@freebsd.org
X-Loop: FreeBSD.org
Precedence: bulk

In message <199705031641.JAA04537@lestat.nas.nasa.gov> Jason Thorpe writes:
: The other port that uses MBR partitions, NetBSD/powerpc, uses the
: "absolute" approach (no "slices" of any sort); if a NetBSD disklabel
: is found, its partition information is used, else the information from
: the MBR is used.  The MBR and the NetBSD disklabel must be consistent
: for partitions that both OpenFirmware and NetBSD share (such as the
: FAT where the boot program is loaded from).

OpenBSD/arc seems to do exactly the same thing.  'c' is the whole
disk, and there must be an MBR if you wanna use that disk to load the
OS off of.

Warner