After reboot unable to detect lvm volume group

[___jul]

Hello,


I'm working on an old version of proxmox

# pveversion -v
pve-manager: 1.9-26 (pve-manager/1.9/6567)
running kernel: 2.6.32-6-pve
proxmox-ve-2.6.32: 1.9-50
pve-kernel-2.6.32-6-pve: 2.6.32-50
qemu-server: 1.1-32
pve-firmware: 1.0-14
libpve-storage-perl: 1.0-19
vncterm: 0.9-2
vzctl: 3.0.29-3pve1
vzdump: 1.2-16
vzprocps: 2.0.11-2
vzquota: 3.0.11-1dso1
pve-qemu-kvm: 0.15.0-1
ksm-control-daemon: 1.0-6

But until a recient reboot, server get frozen (no explication) I can't do snapshot anymore.
Snapshot was working fine before.
To get snapshot, I added an usb disk to server, parted the disk in 2,

• /dev/sdb1 to pve lvm group.
• /dev/sdb2 mounted as /mnt/backup to be the dumpdir.

parted /dev/sdb
GNU Parted 1.8.8
Using /dev/sdb
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted) print
Model: WD DM001 External (scsi)
Disk /dev/sdb: 2000GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt


Number Start End Size File system Name Flags
1 17,4kB 400GB 400GB Backup
2 400GB 800GB 400GB ext3 dumpdir

I was monitoring my vzdump so I get trace of the past like :

Fri Oct 12 03:17:01 CEST 2012
root 320700 0.0 0.0 54044 14420 ? Ss 03:00 0:00 /usr/bin/perl -w /usr/sbin/vzdump --quiet --snapshot --compress --size 5000 --dumpdir /mnt/backup/ --maxfiles 1 205 root 320928 0.0 0.0 8844 1120 ? S 03:00 0:00 s
h -c (cd /mnt/vzsnap0/private/205;find . '(' -regex '^\.$' ')' -o '(' -type 's' -prune ')' -o -print0|sed 's/\\/\\\\/g'|tar czpf - --totals --sparse --numeric-owner --no-recursion --ignore-failed-read --one-file-
system --null -T -) >/mnt/backup/vzdump-openvz-205-2012_10_12-03_00_01.dat root 320929 0.0 0.0 8844 620 ? S 03:00 0:00 sh -c (cd /mnt/vzsnap0/private/205;find . '(' -regex '^\.$' ')' -o '(' -type 's' -prune ')'
-o -print0|sed 's/\\/\\\\/g'|tar czpf - --totals --sparse --numeric-owner --no-recursion --ignore-failed-read --one-file-system --null -T -) >/mnt/backup/vzdump-openvz-205-2012_10_12-03_00_01.dat root 347270 0
.0 0.0 13848 1252 ? Ss 03:17 0:00 /bin/sh /home/adminit/diag-vzdump.sh root 347274 0.0 0.0 13852 500 ? S 03:17 0:00 /bin/sh /home/adminit/diag-vzdump.sh root 347276 0.0 0.0 8892 808 ? S 03:17 0:00 grep vzdump
#############################################
LV VG Attr LSize Origin Snap% Move Log Copy% Convert
data pve owi-ao 910.46G
vzsnap-proxmox-prod-xxx-0 pve swi-ao 4.88G data 87.74
#############################################
VG #PV #LV #SN Attr VSize VFree vzdump --quiet --snapshot --compress --dumpdir /mnt/backup/ --maxfiles 1 103
pve 2 2 1 wz--n- 1.25T 367.64G
#############################################
--- Logical volume ---
LV Name /dev/pve/data
VG Name pve
LV UUID R82noF-Wg5z-rUjm-B9VR-Meio-1IOI-g4yhsO
LV Write Access read/write
LV snapshot status source of
/dev/pve/vzsnap-proxmox-prod-xxx-0 [active]
LV Status available
# open 1
LV Size 910.46 GB
Current LE 233078
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:0

--- Logical volume ---
LV Name /dev/pve/vzsnap-proxmox-prod-xxx-0
VG Name pve
LV UUID 2Uwyg0-wzyT-opTe-Gto1-KjJf-T5Gk-YAlygp
LV Write Access read/write
LV snapshot status active destination for /dev/pve/data
LV Status available
# open 1
LV Size 910.46 GB
Current LE 233078
COW-table size 4.88 GB
COW-table LE 1250
Allocated to snapshot 87.74%
Snapshot chunk size 4.00 KB
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:1

But now using

"vzdump --quiet --snapshot --compress --dumpdir /mnt/backup/ --maxfiles 1 103"

I get :

oct 12 04:58:28 INFO: Starting Backup of VM 103 (openvz)
oct 12 04:58:28 INFO: CTID 103 exist mounted running
oct 12 04:58:28 INFO: status = CTID 103 exist mounted running
oct 12 04:58:28 INFO: mode failure - unable to detect lvm volume group
oct 12 04:58:28 INFO: trying 'suspend' mode instead
oct 12 04:58:28 INFO: backup mode: suspend

However/dev/sdb2 is mounted

mount -v
/dev/sda1 on / type ext3 (rw,errors=remount-ro)
tmpfs on /lib/init/rw type tmpfs (rw,nosuid,mode=0755)
proc on /proc type proc (rw,noexec,nosuid,nodev)
sysfs on /sys type sysfs (rw,noexec,nosuid,nodev)
procbususb on /proc/bus/usb type usbfs (rw)
udev on /dev type tmpfs (rw,mode=0755)
tmpfs on /dev/shm type tmpfs (rw,nosuid,nodev)
devpts on /dev/pts type devpts (rw,noexec,nosuid,gid=5,mode=620)
/dev/mapper/pve-data on /var/lib/vz type ext3 (rw)
beancounter on /proc/vz/beancounter type cgroup (rw,name=beancounter)
container on /proc/vz/container type cgroup (rw,name=container)
fairsched on /proc/vz/fairsched type cgroup (rw,name=fairsched)
/dev/sdb2 on /mnt/backup type ext3 (rw)

/dev/sdb1 is added to lvm

pvdisplay
--- Physical volume ---
PV Name /dev/sda5
VG Name pve
PV Size 910,46 GB / not usable 4,00 MB
Allocatable yes (but full)
PE Size (KByte) 4096
Total PE 233078
Free PE 0
Allocated PE 233078
PV UUID xXY3e4-Lfsi-dmEx-s88N-UZbo-yTHp-SZArxg

--- Physical volume ---
PV Name /dev/sdb1
VG Name pve
PV Size 372,53 GB / not usable 1,71 MB
Allocatable yes
PE Size (KByte) 4096
Total PE 95367
Free PE 95367
Allocated PE 0
PV UUID YsKzJ0-c2fU-N5Dr-xUfl-e4VE-w7W8-0OTmJE


pvscan
PV /dev/sda5 VG pve lvm2 [910,46 GB / 0 free]
PV /dev/sdb1 VG pve lvm2 [372,53 GB / 372,53 GB free]
Total: 2 [1,25 TB] / in use: 2 [1,25 TB] / in no VG: 0 [0 ]

But the snapshot is yet not possible.
What's wrong ?

Thank you for your help,

Jul