At 07:48 AM 8/20/07, you wrote:
While you probably describe a better solution, this was written to provide
a general solution to the "change uuid" problem to the community that
actually works on SATA and to provide a how-to reference for LVM filesystem
cloning in the context of the "how to set up a mirror drive quickly and
easily" section of an article in progress written for novices on how to
transition from an IDE to SATA drive in a Linux workstation.
dd + changing uuid + vgrename appears to be the quickest and easiest
solution for LVM drive cloning, since the user won't have to worry about
setting up drive partitions or creating a MBR or setting up an LVM
filesystem manually.
There are several solutions to drive cloning for experienced users and
admins, but for the newbie, quick, easy, and as few steps as possible are
in order.
A.Lizard
Message: 6
Date: Sun, 19 Aug 2007 19:51:49 -0400 (EDT)
From: "Stuart D. Gathman" <stuart@bmsi.com>
Subject: Re: Altering a Physical Volume's UUID on SATA
hard drives [solved]
To: LVM general discussion and development <linux-lvm@redhat.com>
Message-ID: <Pine.LNX.4.44.0708191740520.2161-100000@bmsred.bmsi.com>
Content-Type: TEXT/PLAIN; charset=US-ASCII
On Sat, 18 Aug 2007, A.Lizard wrote:
> I bit-copied a backup LVM disk using dd from a Knoppix LiveCD (based on
> Debian) and wound up with duplicate volume and uuids, meaning I couldn't
> mount both the main and backup volumes simultaneously at the same time for
> subsequent backups. Of course, vgrename is ineffective to allow
> simultaneous mounting without changing the uuids.
I would suggest copying (bitwise if desired) each LV individually to another
volume group with a different name (and UUID). This gives you a lot more
flexibility with physical storage for primary vs backup volume groups.
Furthermore, your LV backup procedure can take snapshots of each LV first.
--
Stuart D. Gathman <stuart@bmsi.com>
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