[linux-lvm] Restore LVM without UIDs

[linux-lvm] Restore LVM without UIDs

[Sabin Dang]

Hi Everyone,

I assisted in restoring a server today that was connected to an  
external raid that used LVM. Unfortunately there was no backup of the  
LVM config files prior to reinstalling the operating system.

Is there any way to retrieve the data stored on the LVM without the  
old config files?

Thanks,
Sabin

Re: [linux-lvm] Restore LVM without UIDs

[Dieter Stüken]

Sabin Dang wrote:
> Hi Everyone,
> 
> I assisted in restoring a server today that was connected to an  
> external raid that used LVM. Unfortunately there was no backup of the  
> LVM config files prior to reinstalling the operating system.
> 
> Is there any way to retrieve the data stored on the LVM without the  old 
> config files?

At least for LVM2, all meta data is stored on each PV/disk, too. Thus, until
you did not destroy your LVM header/metadata of your disk(s), the former
LVM should be recognized without any external config informations.
Else, you may have a problem. If you have overwritten the first part
of your previous PV, you may try to search the starting point(s) of former
LV(s), and if you are lucky, they have been allocated contiguously.
In this case you may have a good change to recover something.

Dieter. 

[linux-lvm] Re: Restore LVM without UIDs

[Thomas]

Last month I had same problem.
I used hexdump to get back the metadata file and use cfgrestore to cover.
Then mount back the lost LogVol00.

Just my two cents.
"Sabin Dang" <sdang@MIT.EDU> �b�l��
news:06F5C23A-EF8A-4DB1-898C-BCAF9AD9A9E3@mit.edu �����g...
> Hi Everyone,
>
> I assisted in restoring a server today that was connected to an
> external raid that used LVM. Unfortunately there was no backup of the
> LVM config files prior to reinstalling the operating system.
>
> Is there any way to retrieve the data stored on the LVM without the
> old config files?
>
> Thanks,
> Sabin
>
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> read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
>