[linux-lvm] Serious problem and I don't know where to turn.

Richard van den Berg richard at vdberg.org
Fri Jun 29 06:23:03 UTC 2007

WarlockD wrote:
> [root at server ~]# lvscan -a
>   ACTIVE            '/dev/VolGroup00/LogVol00' [147.00 GB] inherit
>   ACTIVE            '/dev/VolGroup00/LogVol01' [1.94 GB] inherit
> [root at server ~]# vgscan
>   Reading all physical volumes.  This may take a while...
>   Found volume group "VolGroup00" using metadata type lvm2
>   Found volume group "ANIME" using metadata type lvm2

So the vg "ANIME" is found, but is not activated? That kind of makes
sense because it is missing the pv on the deleted /dev/sdb2 partition.
According to the vgreduce man pages you can:

vgreduce --removemissing ANIME

to remove all  missing physical volumes from the volume group and make
the volume group consistent again. It's a good idea to run this option
with --test  first to find out what it would remove before running it
for real. There is also "--partial" option you can use to activate vgs
and lvs even if they are missing data. Read the man pages and be very
careful before you proceed.

> Basicly, I have a volume called “ANIME-logical” I am trying to
> restore, but I don’t have the metadata.  Is there a way I can get to it?

Without the metadata that's going to be tough. If the filesystem is all
continuous on your RAID5 partition, technically you should be able to
mount it if you can create a device pointing at the right start, and
with the right size. Good luck figuring that out.

Another approach could be to recreate the /dev/sdb2 partition in exactly
the same way you did before. The metadata might still be there, and the
vg might come up.


Richard van den Berg
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