From mboxrd@z Thu Jan  1 00:00:00 1970
From: Phillip Susi <psusi@cfl.rr.com>
Subject: Re: [dm-devel] Re: LVM on dmraid breakage
Date: Wed, 08 Aug 2007 17:04:12 -0400
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Alasdair G Kergon wrote:
> On Thu, Aug 02, 2007 at 05:50:51PM -0400, Phillip Susi wrote:
>> The problem is that lvm is looking at the physical disks at all.  It 
>> needs to scan the dmraid device, not the underlying disks.
>  
> Indeed.  Please send the evidence showing where it is going wrong so
> we can fix it.

https://bugs.launchpad.net/ubuntu/+source/dmraid/+bug/129285

Note the dm table listing:

nvidia_ajafeffc: 0 625142446 mirror core 2 131072 nosync 2 8:0 0 8:16 0

nvidia_ajafeffc4: 0 464776515 linear 254:2 160360830

nvidia_ajafeffc3: 0 195313 linear 254:2 160156250

nvidia_ajafeffc2: 0 78236550 linear 254:2 81915435

nvidia_ajafeffc1: 0 81915372 linear 254:2 63

volgroup-swap: 0 1843200 linear 8:2 76390784

volgroup-root: 0 76390400 linear 8:2 384

This is do to the fact that the lvm tools open /dev/sd* and look for lvm 
partitions, which it finds.