Lvm

[SamTzu]

I'm testing LVM snapshots in Proxmox 3.1-3.
I have a HP (with raid5 card) test server with ~2Gb OpenVZ container that I tried to backup to NFS storage called t1-backups.
The hard-drive (c0d1p1) is LVM formatted 70Gb SAS drive with only 70% in logical volume 30% (25Gb) non-partitioned. Extent in use 1 - 6225 of 8920.
Can somebody explain to me how "Volume group "c0d1p1" has insufficient free space (174 extents): 256 required."

INFO: starting new backup job: vzdump 170 --remove 0 --mode snapshot --compress lzo --storage t1-backups --node czc7460p68
INFO: Starting Backup of VM 170 (openvz)
INFO: CTID 170 exist mounted running
INFO: status = running
INFO: backup mode: snapshot
INFO: bandwidth limit: 20480 KB/s
INFO: ionice priority: 7
INFO: creating lvm snapshot of /dev/mapper/c0d1p1-c0d1p1 ('/dev/c0d1p1/vzsnap-czc7460p68-0')
INFO: Volume group "c0d1p1" has insufficient free space (174 extents): 256 required.
ERROR: Backup of VM 170 failed - command 'lvcreate --size 1024M --snapshot --name vzsnap-czc7460p68-0 /dev/c0d1p1/c0d1p1' failed: exit code 5
INFO: Backup job finished with errors
TASK ERROR: job errors

 

[SamTzu]

PS. Seems like this failed backup invoked the NOHZ: local_softirq_pending 10 error in console.

 

[dietmar]

What is the output of 'vgdisplay'?

# vgdisplay c0d1p1

 

[SamTzu]

Ignore my ignorance
Of course free space on hard-drive does not equal free space in Volume Group.
What was I thinking? Donuts anyone?