[linux-lvm] Can't access LVM volume group after changing a non-LVM partition

[linux-lvm] Can't access LVM volume group after changing a non-LVM partition

[Òscar Álvarez Vilaplana]

Hi,

When I try to access my lvm group (for example, running vgdisplay) I
get the following error:
  Couldn't find device with uuid '5VBBLW-70Dj-fwjf-Xvzc-7VZr-icQa-l9XQ2N'.
  Couldn't find all physical volumes for volume group data.
  Couldn't find device with uuid '5VBBLW-70Dj-fwjf-Xvzc-7VZr-icQa-l9XQ2N'.
  Couldn't find all physical volumes for volume group data.
  Volume group "data" doesn't exist

It happened just right after I deleted a /dev/hda6 (a *non-lvm*
partition) and created two partitions in the space that the deleted
partition was occupying (/dev/hda6 and /dev/hda8) (my idea was to
shrink /dev/hda6, and that did work).

Here's what the partition table looked before and after the change:

before:
   Device Boot      Start         End      Blocks   Id  System
/dev/hda1   *           1        1459    11719386   8e  Linux LVM
/dev/hda2            1460        3891    19535040   83  Linux
/dev/hda3            3892       14593    85963815    5  Extended
/dev/hda5            3892        5107     9767488+  8e  Linux LVM
/dev/hda6            5108       14225    73240303+  83  Linux
/dev/hda7           14226       14471     1975963+  8e  Linux LVM
/dev/hda8           14472       14593      979933+  82  Linux swap

after:
/dev/hda1   *           1        1459    11719386   8e  Linux LVM
/dev/hda2            1460        3891    19535040   83  Linux
/dev/hda3            3892       14593    85963815    5  Extended
/dev/hda5            3892        5107     9767488+  8e  Linux LVM
/dev/hda6           11796       14225    19518943+  8e  Linux LVM
/dev/hda7           14226       14471     1975963+  8e  Linux LVM
/dev/hda8            5108       11795    53721328+  83  Linux


I looked up (in /etc/lvm) the uuid lvm was complaining about and found
out it corresponds to /dev/hda7. This seems odd, /dev/hda7 should not
have been affected by the partition deleting & creation... its start
and end cylinder remained the same throughout the process and there
was no partition overlapping.

I thought maybe changing the uuid for /dev/hda7 in the /etc/lvm files,
but I couldn't find how to get the correct uuid for /dev/hda7.

What course of action do you suggest? Is it possible to get the data back?

Thanks a lot,
Oscar.

Re: [linux-lvm] Can't access LVM volume group after changing a non-LVM partition

[David Mohr]

On Tue, 2004-12-07 at 14:54 +0100, �scar �lvarez Vilaplana wrote:
--- skip ---
> I thought maybe changing the uuid for /dev/hda7 in the /etc/lvm files,
> but I couldn't find how to get the correct uuid for /dev/hda7.

Use:
pvdisplay /dev/hda7

I don't know either how this could have happened though...

~David

Re: [linux-lvm] Can't access LVM volume group after changing a non-LVM partition

[Heinz Mauelshagen]

On Tue, Dec 07, 2004 at 02:54:39PM +0100, �scar �lvarez Vilaplana wrote:
> Hi,
> 
> When I try to access my lvm group (for example, running vgdisplay) I
> get the following error:
>   Couldn't find device with uuid '5VBBLW-70Dj-fwjf-Xvzc-7VZr-icQa-l9XQ2N'.
>   Couldn't find all physical volumes for volume group data.
>   Couldn't find device with uuid '5VBBLW-70Dj-fwjf-Xvzc-7VZr-icQa-l9XQ2N'.
>   Couldn't find all physical volumes for volume group data.
>   Volume group "data" doesn't exist
> 
> It happened just right after I deleted a /dev/hda6 (a *non-lvm*
> partition) and created two partitions in the space that the deleted
> partition was occupying (/dev/hda6 and /dev/hda8) (my idea was to
> shrink /dev/hda6, and that did work).
> 
> Here's what the partition table looked before and after the change:
> 
> before:
>    Device Boot      Start         End      Blocks   Id  System
> /dev/hda1   *           1        1459    11719386   8e  Linux LVM
> /dev/hda2            1460        3891    19535040   83  Linux
> /dev/hda3            3892       14593    85963815    5  Extended
> /dev/hda5            3892        5107     9767488+  8e  Linux LVM
> /dev/hda6            5108       14225    73240303+  83  Linux
> /dev/hda7           14226       14471     1975963+  8e  Linux LVM
> /dev/hda8           14472       14593      979933+  82  Linux swap
> 
> after:
> /dev/hda1   *           1        1459    11719386   8e  Linux LVM
> /dev/hda2            1460        3891    19535040   83  Linux
> /dev/hda3            3892       14593    85963815    5  Extended
> /dev/hda5            3892        5107     9767488+  8e  Linux LVM
> /dev/hda6           11796       14225    19518943+  8e  Linux LVM
> /dev/hda7           14226       14471     1975963+  8e  Linux LVM
> /dev/hda8            5108       11795    53721328+  83  Linux
> 
> 
> I looked up (in /etc/lvm) the uuid lvm was complaining about and found
> out it corresponds to /dev/hda7. This seems odd, /dev/hda7 should not
> have been affected by the partition deleting & creation... its start
> and end cylinder remained the same throughout the process and there
> was no partition overlapping.
> 
> I thought maybe changing the uuid for /dev/hda7 in the /etc/lvm files,
> but I couldn't find how to get the correct uuid for /dev/hda7.
> 
> What course of action do you suggest? Is it possible to get the data back?

vgscan ; vgdisplay

> 
> Thanks a lot,
> Oscar.
> 
> _______________________________________________
> linux-lvm mailing list
> linux-lvm@redhat.com
> https://www.redhat.com/mailman/listinfo/linux-lvm
> read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/

-- 

Regards,
Heinz    -- The LVM Guy --

*** Software bugs are stupid.
    Nevertheless it needs not so stupid people to solve them ***

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Heinz Mauelshagen                                 Red Hat GmbH
Consulting Development Engineer                   Am Sonnenhang 11
                                                  56242 Marienrachdorf
                                                  Germany
Mauelshagen@RedHat.com                            +49 2626 141200
                                                       FAX 924446
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