[lug] is it possible to recover lvm partitions?

[Lee Woodworth]

If the lvm meta data is really the issue, you might have backup copies of
it in /etc/lvm/backup (depends on how lvm was configured). The new system
also needs to suport the lvm format the drive uses (i.e. version 1 or 2).
An old drive might be version 1. The userland tools can be built without
support for version 1. The pvck and vgck commands may be of use.

On 03/07/2012 10:47 PM, Will Sterling wrote:
> If the volume groups are activating and the logical volumes are showing up
> in /dev/mapper with out any intervention the corruption is probably in the
> file system or there is problem spot on the drive.
>
> Does dd give any IO errors when the logical volume is used as the input
> file?
>
> On Mar 7, 2012, at 9:03 PM, Bear Giles<bgiles at coyotesong.com>  wrote:
>
> Thanks everyone,
>
> To be clear the disk is mounted on another Linux system now. The rest of
> the hardware is old enough to just send it to the big bit bucket in the sky.
>
> Bear
>
>
> On Wed, Mar 7, 2012 at 8:30 PM, Lori Reed<lorireed at lightning-rose.com>wrote:
>
>> On 03/07/2012 06:44 PM, Bear Giles wrote:
>>
>>> I've hit a snag mounting several LVM partitions and wondered if there's
>>> a way to recover the data. The LV are recognized (in /dev/mapper) but
>>> when I try to mount the partitions I get a 'missing superblock' error.
>>> Even an 'od /dev/mapper/vg00-abc' gives me an I/O error.  Ideas?
>>
>> I'm no expert, but a few months ago I recovered a GPT LVM drive using
>> the guide I found here:
>>
>>
>> http://linuxwave.blogspot.com/2007/11/mounting-lvm-disk-using-ubuntu-livecd.html
>>
>> I don't know how much it mattered that my LVM drive did not span any
>> physical drives.
>>
>> Good luck!
>>
>> Lori Reed
>> www.Lightning-Rose.com
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