[linux-lvm] restoring volume group from file
Heinz J . Mauelshagen
mauelshagen at sistina.com
Fri Apr 25 04:27:02 UTC 2003
James,
sounds like you had a problem with your LVs before you copied already,
which I assume was the reason to copy hde5 and run vgcfgrestore.
What does vgck (metadata checker) display ?
Maybe you have better luck with an older metadata backup from
/etc/lvmconf ?
On Thu, Apr 24, 2003 at 12:39:42PM -0400, James W Anderson wrote:
> Hi,
>
> I recently made a copy of an lvm partition to a file, using dd:
>
> dd if=/dev/hde5 of=lvm-file bs=...
>
> I would now like to mount this file, which contains a single volume
> group, on a different machine. Here is what I have done so far:
>
> 1) create a loopback device for the file
>
> # losetup /dev/loop0 lvm-file
>
> 2) pvscan, detects the volume group
>
> # pvscan
> pvscan -- reading all physical volumes (this may take a while...)
> pvscan -- inactive PV "/dev/loop0" of VG "vg00" [23.45 GB / 3.20 GB free]
> pvscan -- total: 1 [23.46 GB] / in use: 1 [23.46 GB] / in no VG: 0 [0]
>
> 3) Now, when I try to do vgcfgrestore, I get the following error:
>
> # vgcfgrestore -n vg00 -f vg00.conf -o /dev/hde5 /dev/loop0
> vgcfgrestore -- size of physical volume /dev/loop0 differs from backup
>
>
> I tried passing the -i option to tell it to ignore the size
> difference, and then it did create the volume group, but all of the
> logical volumes are unusable---e2fsck cannot find the superblocks on
> the filesystems.
>
> Does anyone have any suggestions as to what I might try to get this to
> work? Any help would be tremendously appreciated.
>
> Many thanks,
> James
>
>
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> 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 Sistina Software Inc.
Senior Consultant/Developer Am Sonnenhang 11
56242 Marienrachdorf
Germany
Mauelshagen at Sistina.com +49 2626 141200
FAX 924446
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