[linux-lvm] restoring volume group from file
James W Anderson
jwa at mit.edu
Thu Apr 24 11:39:02 UTC 2003
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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