[linux-lvm] bad checksum in superblock, wanted
Delarians
alexsifm at gmail.com
Thu Mar 30 03:34:48 UTC 2023
Good afternoon, I'm asking for help in recovering damaged metadata after a
220V drop on the server, when the power was restored and the server booted
up, I got an error in the Proxmox panel
Check of pool pve/data failed (status:1). Manual repair required!
then booted from LiveCD debian mounted corrupted metadata and tried to
repair
root at debian:/home/user# lvchange -ay /dev/pve/data_tdata
Do you want to activate component LV in read-only mode? [y/n]: y
Allowing activation of component LV.
root at debian:/home/user# lvs
LV VG Attr
LSize Pool Origin Data% Meta%
Move Log Cpy%Sync Convert
vm-102-disk-0 local-hdd-volume1-pve1
-wi-a----- 50.00g
vm-103-disk-0 local-hdd-volume1-pve1
-wi-a----- 250.00g
vm-104-disk-0 local-hdd-volume1-pve1
-wi-a----- 150.00g
vm-108-disk-0 local-hdd-volume1-pve1
-wi-a----- 20.00g
vm-109-disk-0 local-hdd-volume1-pve1
-wi-a----- 160.00g
vm-110-disk-0 local-hdd-volume1-pve1
-wi-a----- 20.00g
base-101-disk-0 pve
Vri---tz-k 20.00g data
base-105-disk-0 pve
Vri---tz-k 15.00g data
data pve
twi---tz-- <858.97g
root pve
-wi-a----- 30.00g
snap_vm-106-disk-0_Installed pve
Vri---tz-k 15.00g data
snap_vm-106-disk-0_Installed_CspAndVipnet pve
Vri---tz-k 15.00g data
swap pve
-wi-a----- 8.00g
vm-100-disk-0 pve
Vwi---tz-- 20.00g data
vm-100-disk-1 pve
Vwi---tz-- 60.00g data
vm-102-disk-0 pve
Vwi---tz-- 20.00g data
vm-103-disk-0 pve
Vwi---tz-- 30.00g data
vm-104-disk-0 pve
Vwi---tz-- 25.00g data
vm-106-disk-0 pve
Vwi---tz-- 15.00g data snap_vm-106-disk-0_Installed_CspAndVipnet
vm-107-disk-0 pve
Vwi---tz-- 20.00g data
vm-108-disk-0 pve
Vwi---tz-- 30.00g data
vm-109-disk-0 pve
Vwi---tz-- 35.00g data
vm-110-disk-0 pve
Vwi---tz-- 20.00g data
root at debian:/home/user# vgs
VG #PV #LV #SN Attr VSize VFree
local-hdd-volume1-pve1 1 6 0 wz--n- 3.27t <2.64t
pve 1 17 0 wz--n- <930.50g <16.00g
root at debian:/home/user# ls -la /dev/mapper/ | grep -v vm
total 0
drwxr-xr-x 2 root root 240 Mar 29 17:48 .
drwxr-xr-x 19 root root 3700 Mar 29 17:48 ..
crw------- 1 root root 10, 236 Mar 29 17:35 control
lrwxrwxrwx 1 root root 7 Mar 29 17:48 pve-data_tdata -> ../dm-2
lrwxrwxrwx 1 root root 7 Mar 29 17:35 pve-root -> ../dm-1
lrwxrwxrwx 1 root root 7 Mar 29 17:35 pve-swap -> ../dm-0
root at debian:/home/user# thin_dump --repair /dev/mapper/pve-data_tdata >
repaired.xml
The following field needs to be provided on the command line due to
corruption in the superblock: transaction id
root at debian:/home/user# thin_check /dev/mapper/pve-data_tdata
examining superblock
superblock is corrupt
bad checksum in superblock, wanted 2018675394
however, I don’t know how to specify the transaction id and, most
importantly, what id - where to find it
Kernel Version: Linux 5.15.30-2-pve #1 SMP PVE 5.15.30-3 (Fri, 22 Apr 2022
18:08:27 +0200)
PVE Manager Version: pve-manager/7.2-3/c743d6c1
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