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Date: Wed, 16 Sep 2009 11:19:47 -0700
From: malahal@us.ibm.com
Subject: Re: [linux-lvm] Using LVM Mirroring to obtain a usable backup
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Ambrogio De Lorenzo [ambrogio.de.lorenzo@alice.it] wrote:
> Hi all.
> I'm doing a big upgrade on my computer and I tryed to use lv mirroring
> to obtain a copy of my data before to do it.
> 
> As I do with LVM on other OS i thought that after mirroring one could
> chose to split the mirrored lv.
> 
> I can't find how to do it with LVM2 on Linux.

snapshot may be a good fit in this case, but if you insist you can use
lvconvert to convert your linear volume to a mirrored volume. Once the
sync is complete, you can use the same lvconvert to convert the mirror
volume to a linear one.

Thanks, Malahal.