[linux-lvm] Recovering PV's VG metadata
HopNet
hne at inetnow.net
Sun Mar 18 10:52:21 UTC 2001
Hello all. I would appreciate any help or pointers to recovering the VG
data on a "blown" PV.
My setup:
Logical Volume Manager 0.8 by Heinz Mauelshagen 04/11/1999 (IOP 6)
x86/OS SuSE 6.4 on system disk (scsi, non-LVM)
data on VG00 on hda & hdc (whole disk, no partitions)
only one LVol exists, and takes up whole VG.
hda & hdc are identical models of hard drives.
VG01 in examples is a NEW VG on scsi array and can be ignored.
Problem:
OS disk got trashed & system wasn't bootable.
Reinstalled OS. I think at this point, LILO, thinking hda was the
boot drive, overwrote some of the VG data.
no LVMtab or conf files to vgcfgrestore from. :-(
Now:
pvdata sees partial data on hda, and everything on hdc
What I'm looking for:
Is there anyway to take common data from hdc and write it back to
hda. What tools are available for sector editing (LVM or general)?
zeus:~ # pvdata -a /dev/hda
--- Physical volume ---
PV Name
VG Name
ΦR
PV Size 12.14 GB / NOT usable 3.21 MB [LVM: 16.09 MB]
PV# 0
PV Status NOT available
Allocatable yes (but full)
Cur LV 1
PE Size (KByte) 4096
Total PE 3106
Free PE 0
Allocated PE 3106
Segmentation fault
zeus:~ # pvdata -N -P /dev/hdc
--- Physical volume ---
PV Name /dev/hdc
VG Name vg00
PV Size 12.14 GB / NOT usable 3.24 MB [LVM: 242 KB]
PV# 2
PV Status available
Allocatable yes (but full)
Cur LV 1
PE Size (KByte) 4096
Total PE 3106
Free PE 0
Allocated PE 3106
--- List of physical volumes ---
000: /dev/hda
001: /dev/hdc
zeus:~ # pvscan
pvscan -- reading all physical volumes (this may take a while...)
pvscan -- ACTIVE PV "/dev/sdb1" of VG "vg01" [21.26 GB / 11.26 GB
free]
pvscan -- inactive PV "/dev/hdc" is associated to an unknown VG (run
vgscan)
pvscan -- total: 2 [33.4 GB] / in use: 2 [33.4 GB] / in no VG: 0 [0]
zeus:~ #
If there is any other info that might be helpful, please ask.
Thanks again,
Keith at HopNet
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