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Date: Wed, 27 Mar 2013 16:08:20 -0400
From: Stuart D Gathman <stuart@bmsi.com>
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Subject: Re: [linux-lvm] vg disappeared after replacing disc in raid10
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To: linux-lvm@redhat.com

On 03/25/2013 05:50 PM, Bj=EF=BF=BDrn Nadrowski expounded in part:
> Well, I see I would have to remove the volume group first, at the very=20
> least.
I wouldn't.  Just think of your vgcreate as removing all LVs and=20
renaming the VG.  Now you want to undo all that
with a vgcfgrestore.
> But I would just be back in the middle of my problem description on=20
> ubuntuforums, wouldn' t I?
> Still no volume group, still no logical volumes...
Does knoppix have an older lvm version that doesn't recognize your=20
metadata?  I *hope* it doesn't have lvm1, which used binary metadata....

If you see the human readable metadata, and knoppix doesn't, then there=20
is a problem with knoppix.  Either ancient lvm, or the device filtered=20
out for vgscan in lvm.conf.