From owner-freebsd-hackers  Thu Jan  1 03:59:32 1998
Return-Path: <owner-freebsd-hackers@FreeBSD.ORG>
Received: (from majordom@localhost)
          by hub.freebsd.org (8.8.7/8.8.7) id DAA07858
          for hackers-outgoing; Thu, 1 Jan 1998 03:59:32 -0800 (PST)
          (envelope-from owner-freebsd-hackers@FreeBSD.ORG)
Received: from cheops.anu.edu.au (avalon@cheops.anu.edu.au [150.203.76.24])
          by hub.freebsd.org (8.8.7/8.8.7) with ESMTP id DAA07851
          for <freebsd-hackers@FreeBSD.ORG>; Thu, 1 Jan 1998 03:59:22 -0800 (PST)
          (envelope-from avalon@coombs.anu.edu.au)
Message-Id: <199801011159.DAA07851@hub.freebsd.org>
Received: by cheops.anu.edu.au
	(1.37.109.16/16.2) id AA169995900; Thu, 1 Jan 1998 22:58:20 +1100
From: Darren Reed <avalon@coombs.anu.edu.au>
Subject: Re: mounting a FreeBSD partition on NetBSD or SunOS
To: wilko@yedi.iaf.nl (Wilko Bulte)
Date: Thu, 1 Jan 1998 22:58:20 +1100 (EDT)
Cc: bsdean@gte.net, freebsd-hackers@FreeBSD.ORG
In-Reply-To: <199801010954.KAA10709@yedi.iaf.nl> from "Wilko Bulte" at Jan 1, 98 10:54:45 am
X-Mailer: ELM [version 2.4 PL23]
Content-Type: text
Sender: owner-freebsd-hackers@FreeBSD.ORG
Precedence: bulk

In some mail from Wilko Bulte, sie said:
> 
> As Brian Dean wrote...
> > 
> > I have a few questions about filesystems created by one Unix variant
> > and being mounting by another.

I missed or delete the original, but anyway:

/dev/wd0a           38991    30583     5289    85%    /
/dev/wd0s3f        347647   132834   187002    42%    /usr
/dev/wd0s3g        248175   112892   115429    49%    /usr/local
/dev/wd0s3h        198079    66882   115351    37%    /usr/src
/dev/wd0s3e         63567    11121    47361    19%    /var
procfs                  4        4        0   100%    /proc
kernfs                  1        1        0   100%    /kern
/dev/wd0s1         390864   333336    57528    85%    /dos/c
/dev/wd2s1         205380    78704   126676    38%    /dos/d
/dev/wd2s2a         29263    10858    16942    39%    /netbsd
/dev/wd2s2e         48463    25143    20897    55%    /netbsd/var
/dev/wd2s2f        175663    89254    77626    53%    /netbsd/usr
/dev/wd2s2g         96943     2776    89320     3%    /netbsd/usr/local
/dev/wd2s2h        230191   109871   108811    50%    /netbsd/usr/src

NetBSD can only deal with 1 BSD fdisk partition per disk, whereas FreeBSD
can deal with multiple BSD fdisk partitions using slices.

I only mount the NetBSD partitions read-only and when running NetBSD,
mount the FreeBSD ones read-only.

There are some subtle differences as to how the disklabels are organised,
which can result in some error messages being dumped to the console when
you mount them (I think that's when), depending on which versions of both
operating systems are in use.

Darren