[linux-lvm] vg disappeared after replacing disc in raid10

[Stuart D Gathman]

On 03/25/2013 05:50 PM, Björn Nadrowski expounded in part:
> Well, I see I would have to remove the volume group first, at the very 
> least.
I wouldn't.  Just think of your vgcreate as removing all LVs and 
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 
> ubuntuforums, wouldn' t I?
> Still no volume group, still no logical volumes...
Does knoppix have an older lvm version that doesn't recognize your 
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 
is a problem with knoppix.  Either ancient lvm, or the device filtered 
out for vgscan in lvm.conf.