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Date: Mon, 13 Jul 2009 10:33:49 -0700
From: malahal@us.ibm.com
Subject: Re: [linux-lvm] LVM mirroring or mdadm
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Diego Jacobi [jacobidiego@gmail.com] wrote:
> Hi.
> 
> 
> For te mirrorlog you can partition your new disk with 2 lvm
> partitions. One for logs.
> A mirror log are normally 4 Mb for each mirror, at least in my current system.
> I maked a 1Gb partition only for logs and it is way too much, but 1 Gb
> in current disks is nothing.

You don't need to partition the disk and create a new PV just for the
LVM mirror log. You can use "--alloc anywhere" while creating the mirror
volume and LVM will gladly allocate mirror log on one of your mirror
legs.

--Malahal.