Message-Id: <200605171014.k4HAETHT011371@turing-police.cc.vt.edu>
To: Olaf Hering <olh@suse.de>
Cc: Andrew Morton <akpm@osdl.org>, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] ignore partition table on disks with AIX label
In-Reply-To: Your message of "Wed, 17 May 2006 11:10:56 +0200."
             <20060517091056.GA21219@suse.de>
From: Valdis.Kletnieks@vt.edu
References: <20060517081314.GA20415@suse.de> <200605170853.k4H8rn8K009466@turing-police.cc.vt.edu>
            <20060517091056.GA21219@suse.de>
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On Wed, 17 May 2006 11:10:56 +0200, Olaf Hering said:
>  On Wed, May 17, Valdis.Kletnieks@vt.edu wrote:
> > One has to wonder if it might not be better to treat this case as
> > "one partition covering the entire disk", or even better, decode the AIX LVM
> > info and see if there's any LVM segments present on the disk, so as to limit
> > the chances of accidentally splatting live data.
> The check can go once someone has implemented proper support to read the
> drives. Up to now the bogus partitions cause only confusion and practical
> doesnt help anyone. So let it go.

Is there any interest in being able to deal with AIX's LVM and/or JFS/JFS2
(probably only read-only)?  If so, what level of support would be needed
to make it useful?

(Personally, being able to deal with it on a read-only basis for forensics
work would be useful - currently there's no really good way to deal with
an AIX system in a forensically sound manner, because 'importvg' and
friends have a tendency to scribble on the disks....)

Sanest way to approach it would probably be a mostly-userspace that
grovels out the LVM data and creates a device-mapper target.  ISTR there
was such a beast for the EVMS code, but I haven't gone digging for it yet.

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