Re: [linux-lvm] Help! VG corrupted?

["Heinz J . Mauelshagen" <mauelshagen@sistina.com>]

Ben,

what does vgck(8) tell you about the health of your LVM on disk metadata?
BTW: it is recommended that you upgrade to LVM 1.0.1

On Mon, Nov 19, 2001 at 02:12:31PM -0500, Ben wrote:
> Hello,
> 
> I am running Mandrake 8.1 which installs Linux LVM 0.9.  I've read posts
> that mention that 0.9 is "bad for your health."  While I'm not totally
> sure why or how, it seems to be the case for me as well.
> 
> I installed the OS and ran find with one IDE HD partition dedicated
> (/dev/hda9, one VG on one PV) to LVM and two LV's (/usr and /var).
> Yesterday, I added another partition (/dev/hda7) and added its PEs to
> the VG.  I thhen added the newly added PE's to the /usr LV.  Everything
> was great.  Then I rebooted.  Upon reboot, I got:
> [root@cray]# vgscan -v
> vgscan -- removing "/etc/lvmtab" and "/etc/lvmtab.d"
> vgscan -- reading all physical volumes (this may take a while...)
> vgscan -- scanning for all active volume group(s) first
> vgscan -- found inactive volume group "vg0"
> vgscan -- reading data of volume group "vg0" from physical volume(s)
> vgscan -- ERROR "vg_read_with_pv_and_lv(): allocated LE of LV" can't get
> data of volume group "vg0" from physical volume(s)
> vgscan -- ERROR "vg_read_with_pv_and_lv(): allocated LE of LV" creating
> "/etc/lvmtab" and "/etc/lvmtab.d"
> [root@cray]#
> 
> I then tried the vgcfgrestore, which ran sucessfully.  Now I get vgscan
> reporting no volumes.  Found a reference on how to fix this (using dd
> and reading uuids from pv's, then writing them back to the disk).  That
> procedure brings me back to the starting point.
> 
> It seems the data is there because pvscan reports:
> 
> [root@cray]# pvscan
> pvscan -- reading all physical volumes (this may take a while...)
> pvscan -- inactive PV "/dev/ide0/host0/bus0/target0/lun0/part7" is
> associated to an unknown VG (run vgscan)
> pvscan -- inactive PV "/dev/ide0/host0/bus0/target0/lun0/part9" is
> associated to an unknown VG (run vgscan)
> pvscan -- total 2 [12.02 GB] / in use: 2 [12.02 GB] / in no VG: 0 [0]
> [root@cray]#
> 
> One more note of interest:  My partitions on disk are out of order.
> hda7 occupies cylinders 2848-3736 and hda9 occupies cylinders 2168-2847.
> 
> [root@cray]# fdisk /dev/hda
> Command (m for help): p
> 
> Disk /dev/hda: 255 heads, 63 sectors, 3763 cylinders
> Units = cylinders of 16065 * 512 bytes
> 
>    Device Boot     Start       End      Blocks    Id  System
> /dev/hda1  *           1       934     7502323+    b  Win95 FAT32
> /dev/hda2            935      3736    22507065     5  Extended
> /dev/hda5  *         935      1874     7550518+    7  HPFS/NTFS
> /dev/hda6           1875      2135     2096451    83  Linux
> /dev/hda7           2848      3736     7140861    8e  Linux LVM
> /dev/hda8           2136      2167      256977    82  Linux swap
> /dev/hda9           2168      2847     5462037    8e  Linux LVM
> 
> Partition table entries are not in disk order
> 
> 
> 
> 
> So, can anyone help me?  Would recreating the VG and adding the PV's to
> it restore access to my data?  Or would I just blow it all away in the
> attempt?
> 
> Please send responses directly to kf4wbx@hamsnet.net
> 
> 
> Thanks for any help!
> -Ben K
> kf4wbx@hamsnet.net
> 
> 
> 
> 
> 
> 
> 
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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                                 Sistina Software Inc.
Senior Consultant/Developer                       Am Sonnenhang 11
                                                  56242 Marienrachdorf
                                                  Germany
Mauelshagen@Sistina.com                           +49 2626 141200
                                                       FAX 924446
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