Install a new LVM volume as extra storage

[check-ict]

Hello,

I have a 2x4 RAID10 setup (8 disks total). I installed Proxmox on the first RAID set, but now I want to add the second RAID set as extra storage for virtual machines.

I fdisk the disk and create a LVM partition.
Then I do this:
pvcreate /dev/sdb1
vgcreate data2 /dev/sdb1
lvcreate -L 1850G -n data2 data2
mkfs.ext4 /dev/mapper/data2-data2
mount /dev/mapper/data2-data2 /mnt/data2

Then I go to the web interface and create a directory "/mnt/data2" for virtual machines.

When I do back-ups, I get the following error:
101: Jun 23 17:23:02 INFO: Starting Backup of VM 101 (qemu)
101: Jun 23 17:23:02 INFO: running
101: Jun 23 17:23:02 INFO: status = running
101: Jun 23 17:23:02 INFO: mode failure - unable to detect lvm volume group
101: Jun 23 17:23:02 INFO: trying 'suspend' mode instead
101: Jun 23 17:23:02 INFO: backup mode: suspend
101: Jun 23 17:23:02 INFO: ionice priority: 7
101: Jun 23 17:23:02 INFO: suspend vm
101: Jun 23 17:23:03 INFO: creating archive '/mnt/backup1/vzdump-qemu-101-2011_06_23-17_23_02.tar'
101: Jun 23 17:23:03 INFO: adding '/mnt/backup1/vzdump-qemu-101-2011_06_23-17_23_02.tmp/qemu-server.conf' to archive ('qemu-server.conf')
101: Jun 23 17:23:03 INFO: adding '/mnt/data2/images/101/vm-101-disk-1.raw' to archive ('vm-disk-virtio1.raw')
101: Jun 23 17:24:38 INFO: Total bytes written: 740951552 (7.43 MiB/s)
101: Jun 23 17:24:38 INFO: archive file size: 706MB
101: Jun 23 17:24:38 INFO: delete old backup '/mnt/backup1/vzdump-qemu-101-2011_06_23-17_17_01.tar'
101: Jun 23 17:24:38 INFO: resume vm
101: Jun 23 17:24:38 INFO: vm is online again after 96 seconds
101: Jun 23 17:24:38 INFO: Finished Backup of VM 101 (00:01:36)


pvdisplay:
--- Physical volume ---
PV Name /dev/sdb1
VG Name data2
PV Size 1.82 TB / not usable 3.28 MB
Allocatable yes
PE Size (KByte) 4096
Total PE 476670
Free PE 3070
Allocated PE 473600
PV UUID bWHgsu-Wtex-rxH0-IZOL-k5us-mDWE-YIO8eD

--- Physical volume ---
PV Name /dev/sda2
VG Name pve
PV Size 1.82 TB / not usable 3.28 MB
Allocatable yes
PE Size (KByte) 4096
Total PE 476542
Free PE 1022
Allocated PE 475520
PV UUID N2VPOY-zMAz-Ar2a-cV7U-E0AD-4dhF-w3xlpx

pveversion:
pve-manager: 1.8-18 (pve-manager/1.8/6070)
running kernel: 2.6.32-4-pve
proxmox-ve-2.6.32: 1.8-33
pve-kernel-2.6.32-4-pve: 2.6.32-33
qemu-server: 1.1-30
pve-firmware: 1.0-11
libpve-storage-perl: 1.0-17
vncterm: 0.9-2
vzctl: 3.0.27-1pve1
vzdump: 1.2-13
vzprocps: 2.0.11-2
vzquota: 3.0.11-1
pve-qemu-kvm: 0.14.1-1
ksm-control-daemon: 1.0-6

pveperf:
CPU BOGOMIPS: 32002.74
REGEX/SECOND: 667865
HD SIZE: 94.49 GB (/dev/mapper/pve-root)
BUFFERED READS: 429.98 MB/sec
AVERAGE SEEK TIME: 8.79 ms
FSYNCS/SECOND: 1894.49
DNS EXT: 78.70 ms
DNS INT: 30.43 ms (24x7hosting.nl)

 

[dietmar]

Does it work if your use ext3 instead of ext4?

BTW, you can also use LVM directly (without and file system).

 

[check-ict]

Thanks for the quick answer.

Ext3 solved the problem! I will continue using ext3 now.


101: Jun 23 17:59:01 INFO: Starting Backup of VM 101 (qemu) 101: Jun 23 17:59:02 INFO: running 101: Jun 23 17:59:02 INFO: status = running 101: Jun 23 17:59:02 INFO: backup mode: snapshot 101: Jun 23 17:59:02 INFO: ionice priority: 7 101: Jun 23 17:59:02 INFO: Logical volume "vzsnap-proxmox02-0" created