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Re: [linux-lvm] Help with my LVM

On Wed, Apr 28, 2004 at 01:24:29PM -0300, Rodolfo Sikora de Melo 2 wrote:
> Guys, I'm desperate needing help.
> After a reboot one of lvm pv stopped do work.

What *exactly* happened to your LVM PVs before the reboot ?

> The scenario:
> 10 disks: 
> 5 disks in channel A Raid 5
> 5 disks in channel B Raid 5
> the sda has sda1 sda2 sda3, where only sda3 is a physical volume and is working great.
> the sda has sdb1 sdb2 sdb3, where only sdb3 is a physical volume and after a reboot stopped to work.
> licor:~/uuid_fixer# pvdisplay /dev/sdb3
> pvdisplay -- no physical volume identifier on "/dev/sdb3"

Presumably your RAID is fully operational, some{one|thing} has written
over the LVM metadata. At least partionally.

> What I can do to fix this? I have 100Gb of important data inside this PV. 

If just the LVM metatada and no data on /dev/sdb3 is gone *and* you've
got /etc/lvmconf/ metadata backups, you want to run:

# pvcreate -ff /dev/sdb3
# vgcfgrestore -n VGName /dev/sdb3

Before you do that or any other changes to your disks, let's make clear 
what really happend first!

> I can provide any information u need to help me!
> Thank you very much.
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Heinz    -- The LVM Guy --

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


Heinz Mauelshagen                                 Red Hat GmbH
Consulting Development Engineer                   Am Sonnenhang 11
                                                  56242 Marienrachdorf
Mauelshagen RedHat com                            +49 2626 141200
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