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Date: Fri, 19 Sep 2008 10:31:08 -0700
From: malahal@us.ibm.com
Subject: Re: [linux-lvm] Mirrored LV
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Koen Vermeer [koen@vermeer.tv] wrote:
> I tried converting my lv to a mirrored one with --corelog, which worked
> perfectly. However, after a reboot, the mirror is being recreated, which
> takes quite some time and leaves me with a largely unresponsive system.
> 
> Is there some way around this? Would having the log on the master disk
> fix this? If so, does it need it's own PV or LV or neither?

It needs it own PV. Create an extra partition on your master disk and
add the PV tou the volume group.  Then run lvcreate again with out
corelog option. By default the command would create a disklog. You can
also specify where you want your log.

--Malahal.