From: Fabian Herschel <fabian.herschel@suse.de>
To: linux-lvm@sistina.com, lvm@interlinx.bc.ca
Subject: Re: [linux-lvm] Two drives with the same UUID
Date: Mon Jan 13 05:05:02 2003 [thread overview]
Message-ID: <03011311575101.01471@grimsel> (raw)
In-Reply-To: <20030110213858.GI3393@pc.ilinx>
On Friday 10 January 2003 22:38, lvm@interlinx.bc.ca wrote:
> If I had a system with a functional LVM configuration (1.0.6ish) and I
> were to "duplicate" the drive in it (i.e. dd if=/dev/sda of=/dev/sdb)
> and then try to boot that system (with both drives installed and
> functional), what would happen?
>
> Of course, because I am asking, I have tried it. :-) During boot LVM
> failed to find any logical volumes. Is this expected? It's not
> surprising mind you, but I wonder how it was designed to deal with
> this situation.
Sorry, but this is a normal reaction of the logical volume manager. Why?
Each "normal" volume manager uses a special part of the disk device (or a
special part of a partition) to identify the physical media. If you copy the
complete disk, you also copy this unique identifier. So LVM get confused
to find a media twice.
Best regards
Fabian Herschel
>
> b.
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<Fabian.Herschel@suse.de>
SuSE Linux AG * Mergenthalerallee 45-47 * D-65760 Eschborn
Tel: +49-6196-50951-23 * Fax: +49-6196-409-607
http://www.suse.de * Alice Homepage: http://www.suse.de/~fabian
prev parent reply other threads:[~2003-01-13 5:05 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-01-10 15:38 [linux-lvm] Two drives with the same UUID lvm
2003-01-13 5:05 ` Fabian Herschel [this message]
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