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Date: Tue, 15 Sep 2009 12:49:39 +0100
From: Alasdair G Kergon <agk@redhat.com>
Subject: Re: [linux-lvm] I've tried to get some support on this list about lvm
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To: LVM general discussion and development <linux-lvm@redhat.com>

On Tue, Sep 15, 2009 at 09:37:44PM +1000, Hugh wrote:
> Sep 10 20:55:46 fc11-64 kernel: device-mapper: table: device 8:18 
> too small for target

There's your answer: You're trying to make it bigger than the underlying
device.

Use pvs -v to check device sizes for discrepancies.
(--units s if necessary).

Alasdair