* [linux-lvm] restoring volume group from file @ 2003-04-24 11:39 James W Anderson 2003-04-25 4:27 ` Heinz J . Mauelshagen 0 siblings, 1 reply; 4+ messages in thread From: James W Anderson @ 2003-04-24 11:39 UTC (permalink / raw) To: linux-lvm 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 ^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [linux-lvm] restoring volume group from file 2003-04-24 11:39 [linux-lvm] restoring volume group from file James W Anderson @ 2003-04-25 4:27 ` Heinz J . Mauelshagen 2003-04-26 15:16 ` James W Anderson 0 siblings, 1 reply; 4+ messages in thread From: Heinz J . Mauelshagen @ 2003-04-25 4:27 UTC (permalink / raw) To: linux-lvm 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 > > > _______________________________________________ > linux-lvm mailing list > linux-lvm@sistina.com > http://lists.sistina.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 *** =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- Heinz Mauelshagen Sistina Software Inc. Senior Consultant/Developer Am Sonnenhang 11 56242 Marienrachdorf Germany Mauelshagen@Sistina.com +49 2626 141200 FAX 924446 =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- ^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [linux-lvm] restoring volume group from file 2003-04-25 4:27 ` Heinz J . Mauelshagen @ 2003-04-26 15:16 ` James W Anderson 2003-04-28 3:55 ` Heinz J . Mauelshagen 0 siblings, 1 reply; 4+ messages in thread From: James W Anderson @ 2003-04-26 15:16 UTC (permalink / raw) To: linux-lvm Thanks for responding. vgck seems to say that things are alright: # vgck /dev/vg00 vgck -- VGDA of "vg00" in lvmtab is consistent vgck -- VGDA of "vg00" on physical volume is consistent I also did try to restore all of the old metadata backups, but to no avail. Do you have any other suggestions? I still do not understand why vgcfgrestore say that the sizes are different, since I did a block-by-block copy from the original partition. Thank you again for your help. On Fri, Apr 25, 2003 at 11:21:24AM +0200, Heinz J . Mauelshagen wrote: > > 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 > > > > ^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [linux-lvm] restoring volume group from file 2003-04-26 15:16 ` James W Anderson @ 2003-04-28 3:55 ` Heinz J . Mauelshagen 0 siblings, 0 replies; 4+ messages in thread From: Heinz J . Mauelshagen @ 2003-04-28 3:55 UTC (permalink / raw) To: linux-lvm On Sat, Apr 26, 2003 at 04:16:22PM -0400, James W Anderson wrote: > Thanks for responding. > > vgck seems to say that things are alright: > > # vgck /dev/vg00 > vgck -- VGDA of "vg00" in lvmtab is consistent > vgck -- VGDA of "vg00" on physical volume is consistent > Odd, vgscan should find your VG fine in that case :( You say that fsck can't find the superblocks but can you read (dd) the LVs fine after the restore ? > I also did try to restore all of the old metadata backups, but to no > avail. > > Do you have any other suggestions? I still do not understand why > vgcfgrestore say that the sizes are different, since I did a > block-by-block copy from the original partition. vgcfgrestore checks the _exact_ size of the PV before restorring the meatadata. To get around this constraint which is aiming to prove that the device to restore to is the right one, user can use the ignore flag if (s)he knows what (s)he's doing ;) Regards, Heinz -- The LVM Guy -- > > Thank you again for your help. > > On Fri, Apr 25, 2003 at 11:21:24AM +0200, Heinz J . Mauelshagen wrote: > > > > 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 > > > > > > > > _______________________________________________ > linux-lvm mailing list > linux-lvm@sistina.com > http://lists.sistina.com/mailman/listinfo/linux-lvm > read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/ *** Software bugs are stupid. Nevertheless it needs not so stupid people to solve them *** =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- Heinz Mauelshagen Sistina Software Inc. Senior Consultant/Developer Am Sonnenhang 11 56242 Marienrachdorf Germany Mauelshagen@Sistina.com +49 2626 141200 FAX 924446 =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- ^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2003-04-28 3:55 UTC | newest] Thread overview: 4+ messages (download: mbox.gz follow: Atom feed -- links below jump to the message on this page -- 2003-04-24 11:39 [linux-lvm] restoring volume group from file James W Anderson 2003-04-25 4:27 ` Heinz J . Mauelshagen 2003-04-26 15:16 ` James W Anderson 2003-04-28 3:55 ` Heinz J . Mauelshagen
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