From owner-freebsd-hackers@FreeBSD.ORG  Sat Jul 30 22:50:56 2005
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Date: Sat, 30 Jul 2005 16:50:54 -0600 (MDT)
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To: jbaggs@san.rr.com
From: "M. Warner Losh" <imp@bsdimp.com>
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Cc: hackers@freebsd.org
Subject: Re: UFS endian-ness
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In message: <42EBDC29.2070603@san.rr.com>
            Jeremy Baggs <jbaggs@san.rr.com> writes:
:   I was wondering if anyone has done any recent work with, or knows how
: (non-)trival it would be adding support for mounting big-endian UFS 
: filesystems,  such as the one in use on os X.

It is trivial.  NetBSD just does the swapping on input or output and
the diffs to do it were small.

Warner