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Re: Recovering an lvm partition



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On Mon, 28 May 2007 09:51:47 -0700
Andrew Sackville-West <andrew@farwestbilliards.com> wrote:

> On Mon, May 28, 2007 at 11:40:33AM -0500, Jacob S wrote:
> > On Mon, 28 May 2007 11:08:18 -0400
> > Roberto C. Sánchez <roberto@connexer.com> wrote:
> > 
> > > On Mon, May 28, 2007 at 10:01:32AM -0500, Jacob S wrote:
> > > > 
> > > > I managed to fix that part of it, eventually, using vgreduce
> > > > - --removemissing vg_name. However, now lvdisplay shows that
> > > > there is no logical volume on that vg. Nothing has been done to
> > > > erase the filesystem and data, so I am hoping I can recover it.
> > > > But before I simply do an lvcreate and try to get the same
> > > > settings it had previously, does anyone know of something like
> > > > vgcfgrestore that would restore the lv from
> > > > the /etc/lvm/vg_name00000.log config file? 
> > > > 
> > > Hmm.  I've never run unto this.  Any chance you have a recent
> > > backup? If not, are you able to look in the shell history and see
> > > the exact sequence of commands that this unnamed person used to
> > > add the new pv?
> > 
> > No backups... err, oh, happy day! I just found out my backups were
> > working. I thought that partition had gotten full.
> > 
> > No sequence of commands in the shell history, unfortunately. 
> > 
> > But now that I know I have pretty good backups, I will just
> > experiment and see if I can get it working again. If I make any
> > startling discoveries I will be sure and report them to the
> > list. :-)
> 
> if you really want to be able to play with it and have the disk space,
> dd the partitions onto other disks so you can recreate the situation
> multiple times...

Unfortunately I did not have that much free disk space laying around.
(It is an 80GB lvm that is totally full.) However, lvcreate did
sucessfully create a logical volume of the right size and I could then
mount it without a problem. I made sure to specify the right lv size
and not to format it and all the data appears to still be there. 

Thanks,
Jacob
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