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Date:      Fri, 15 Mar 2002 17:14:12 +0100
From:      Christoph Hellwig <hch@caldera.de>
To:        Terry Lambert <tlambert2@mindspring.com>
Cc:        AQUAMAN <yoatl@yahoo.com>, freebsd-fs@FreeBSD.ORG
Subject:   Re: filesystems compatibility
Message-ID:  <20020315171412.A18753@caldera.de>
In-Reply-To: <3C921A04.CFCADA9D@mindspring.com>; from tlambert2@mindspring.com on Fri, Mar 15, 2002 at 07:57:56AM -0800
References:  <20020312185747.98993.qmail@web13305.mail.yahoo.com> <3C8E72A3.6E9CBC6F@mindspring.com> <20020314183219.A28415@caldera.de> <3C9114DA.5A2D0591@mindspring.com> <20020315110059.A32509@caldera.de> <3C921A04.CFCADA9D@mindspring.com>

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On Fri, Mar 15, 2002 at 07:57:56AM -0800, Terry Lambert wrote:
> 8-).  Common mistake.  They have opposite word order, so the
> version number is different.  They also have different VTOC
> and disklabel order, so they're easy to differentiate anyway.

At least SVR4.2MP and 4.4BSD run on LE and BE hardware, and the
Linux UFS driver supports both endianesses and about 10 different
derivates..

VTOC handling is done by Linux between the block drivers and the
filesystem which has advantages by e.g. sharing SysV VTOC support
for sysvfs, ufs and vxfs and cannot easily accessed by the filesystem
due to layering constraints.

> Heh.  I did some work on UFS for SVR4.2MP on SVR4.2MP, and a
> did everything for a derivative called NXFS (the magic number
> on that one is _my_ birthday).  ;^).

That NetWare-Attributes thingy? *shrug*

	Christoph

-- 
Of course it doesn't work. We've performed a software upgrade.

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