LVM Woes (hope this isn't a repeat. sorry)

linux-lvm Andrew 3 participants 3 messages Mar 14, 2005

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Andrew

author

2005-03-14 00:49 UTC #0 lore raw

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My problem is that I accidentally left my LVM disks in my system when I installed windows XP On a seperate drive. I did not install windows to either of the LVM's so that should not be an issue.

However when I replaced my linux drive, and booted into linux, I got the following error when my system tried to start up LVM
(for vgchange -ay)
mog root # vgchange -ay
2 logical volume(s) in volume group "vg0" now active
Logical volume (lv0) contains an incomplete mapping table Unable to find volume group "vg_samsung"

vg0 is my other lvm which thankfully is still there.

now, whenever I do any of the 'scan' tools (vgscan, pvscan, lvscan) I get the following errors:
vgscan:
...
Logical volume (lv0) contains an incomplete mapping table
Unable to find volume group "vg_samsung"

pvscan:
Logical volume (lv0) contains an incomplete mapping table
...

lvscan:
...
Logical volume (lv0) contains an incomplete mapping table Unable to find volume group "vg_samsung"

however, if I do pvdisplay on my 2 drives I get some info
mog root # pvdisplay /dev/hde <--my 160gig drive, I think the second drive
in the LVM

- --- NEW Physical volume ---
PV Name /dev/hde
VG Name /vg_samsung
PV Size 19.84 MB
Allocatable NO
PE Size (K..) 0
Total PE 0
Free PE 0
Allocated PE 0
PV UUID fXhdbW-S1KK-lSNs-kGSQ-dsb6-9Kkn-Q7xeTk

That looks bad to me, but the first drive in the volume looks ok:

mog root # pvdisplay /dev/hdg <--my 80gig drive
- --- Physical volume ---
PV Name /dev/hdg
VG Name /vg_samsung
PV Size 74.56 GB / not usable 31.57 MB
Allocatable yes (but full)
PE Size (K..) 16384
Total PE 4770
Free PE 0
Allocated PE 4770
PV UUID aE0Tfs-UX8r-oTma-Eo35-mxSg-ZT5w-ZHPPTW

so it looks like windows only blasted the second of the two drives (which came first in the bios) (or the
first one it found?)

I am desperate to get this data back (and unfortunately my /etc/lvm/backup or archive are empty :(

Thankyou very much in advance!
- --

- --Andrew Bovill

PGP fingerprint:  A00A 1E75 3AB0 610E 2300  6855 1890 C61E E590 F777
Link to PGP key:  http://linuxboy.dyndns.org/~andy/public_key.gpg

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go0ogl3

2005-03-14 07:53 UTC #1 lore raw

Hello!

I'm new at lvm but maybe Windows just overwrited the first 512 bytes
of that disk. Try dd_rescue or search the list arhive you'll find some similar situation (oliver with a hex editor).

I hope you'll make it!

Quoted 89 lines · Andrew

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My problem is that I accidentally left my LVM disks in my system when I installed windows XP On a seperate drive. I did not install windows to either of the LVM's so that should not be an issue.
However when I replaced my linux drive, and booted into linux, I got the following error when my system tried to start up LVM
(for vgchange -ay)
mog root # vgchange -ay
2 logical volume(s) in volume group "vg0" now active
Logical volume (lv0) contains an incomplete mapping table Unable to find volume group "vg_samsung"
vg0 is my other lvm which thankfully is still there.
now, whenever I do any of the 'scan' tools (vgscan, pvscan, lvscan) I get the following errors:
vgscan:
...
Logical volume (lv0) contains an incomplete mapping table
Unable to find volume group "vg_samsung"
pvscan:
Logical volume (lv0) contains an incomplete mapping table
...
lvscan:
...
Logical volume (lv0) contains an incomplete mapping table Unable to find volume group "vg_samsung"
however, if I do pvdisplay on my 2 drives I get some info
mog root # pvdisplay /dev/hde <--my 160gig drive, I think the second drive
in the LVM
- --- NEW Physical volume ---
PV Name         /dev/hde
VG Name         /vg_samsung
PV Size         19.84 MB
Allocatable     NO
PE Size (K..)   0
Total PE                0
Free PE         0
Allocated PE    0
PV UUID         fXhdbW-S1KK-lSNs-kGSQ-dsb6-9Kkn-Q7xeTk
That looks bad to me, but the first drive in the volume looks ok:
mog root # pvdisplay /dev/hdg <--my 80gig drive
- --- Physical volume ---
PV Name         /dev/hdg
VG Name         /vg_samsung
PV Size         74.56 GB / not usable 31.57 MB
Allocatable     yes (but full)
PE Size (K..)   16384
Total PE                4770
Free PE         0
Allocated PE    4770
PV UUID         aE0Tfs-UX8r-oTma-Eo35-mxSg-ZT5w-ZHPPTW
so it looks like windows only blasted the second of the two drives (which came first in the bios) (or the
first one it found?)
I am desperate to get this data back (and unfortunately my /etc/lvm/backup or archive are empty :(
Thankyou very much in advance!
- --
- --Andrew Bovill
PGP fingerprint:  A00A 1E75 3AB0 610E 2300  6855 1890 C61E E590 F777
Link to PGP key:  http://linuxboy.dyndns.org/~andy/public_key.gpg
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_______________________________________________
linux-lvm mailing list
[email protected]
https://www.redhat.com/mailman/listinfo/linux-lvm
read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/

Dan Stromberg

2005-03-14 20:16 UTC #2 lore raw

If it's just the MBR that got wiped, you may be able to just reinstall grub/lilo and be good to go, but you may also need to use some sort of partition guesser to see all of your filesystems again.

The group I work in automatically collects our MBR's via our usual, automated system-statistics collection, the relevant portion of which looks like:

dd if=/dev/$disk bs=512 count=1 2> /dev/null | \
    openssl base64 -e | \
    sed "s#^#mbr-$disk #"

HTH.

Quoted 105 lines · On Mon, 2005-03-14 at 09:52 +0200, go0ogl3 wrote:

Hello!
I'm new at lvm but maybe Windows just overwrited the first 512 bytes
of that disk. Try dd_rescue or search the list arhive you'll find some similar situation (oliver with a hex editor).
I hope you'll make it!
Quoted 83 lines · Andrew
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
My problem is that I accidentally left my LVM disks in my system when I installed windows XP On a seperate drive. I did not install windows to either of the LVM's so that should not be an issue.
However when I replaced my linux drive, and booted into linux, I got the following error when my system tried to start up LVM
(for vgchange -ay)
mog root # vgchange -ay
2 logical volume(s) in volume group "vg0" now active
Logical volume (lv0) contains an incomplete mapping table Unable to find volume group "vg_samsung"
vg0 is my other lvm which thankfully is still there.
now, whenever I do any of the 'scan' tools (vgscan, pvscan, lvscan) I get the following errors:
vgscan:
...
Logical volume (lv0) contains an incomplete mapping table
Unable to find volume group "vg_samsung"
pvscan:
Logical volume (lv0) contains an incomplete mapping table
...
lvscan:
...
Logical volume (lv0) contains an incomplete mapping table Unable to find volume group "vg_samsung"
however, if I do pvdisplay on my 2 drives I get some info
mog root # pvdisplay /dev/hde <--my 160gig drive, I think the second drive
in the LVM
- --- NEW Physical volume ---
PV Name         /dev/hde
VG Name         /vg_samsung
PV Size         19.84 MB
Allocatable     NO
PE Size (K..)   0
Total PE                0
Free PE         0
Allocated PE    0
PV UUID         fXhdbW-S1KK-lSNs-kGSQ-dsb6-9Kkn-Q7xeTk
That looks bad to me, but the first drive in the volume looks ok:
mog root # pvdisplay /dev/hdg <--my 80gig drive
- --- Physical volume ---
PV Name         /dev/hdg
VG Name         /vg_samsung
PV Size         74.56 GB / not usable 31.57 MB
Allocatable     yes (but full)
PE Size (K..)   16384
Total PE                4770
Free PE         0
Allocated PE    4770
PV UUID         aE0Tfs-UX8r-oTma-Eo35-mxSg-ZT5w-ZHPPTW
so it looks like windows only blasted the second of the two drives (which came first in the bios) (or the
first one it found?)
I am desperate to get this data back (and unfortunately my /etc/lvm/backup or archive are empty :(
Thankyou very much in advance!
- --
- --Andrew Bovill
PGP fingerprint:  A00A 1E75 3AB0 610E 2300  6855 1890 C61E E590 F777
Link to PGP key:  http://linuxboy.dyndns.org/~andy/public_key.gpg
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=bymV
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Quoted 6 lines
_______________________________________________
linux-lvm mailing list
[email protected]
https://www.redhat.com/mailman/listinfo/linux-lvm
read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
_______________________________________________
linux-lvm mailing list
[email protected]
https://www.redhat.com/mailman/listinfo/linux-lvm
read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/