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LVM Backup SnapShot

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Hello - I have a hard drive which approx 1.36TB - That drive I have setup as LVM and I do have two VM in that drive now I also wanted to use that drive to store backups and snapshots - How can I do that.

Also I have 3 Drives in my server one is 419GB , 145GB and 1.36tb - I wanted to use 145GB but couldn't tell which one is it based on Fdisk -l

Code:

root@NOD2:~# fdisk -l

Disk /dev/sdc: 450.1 GB, 450098159616 bytes
255 heads, 63 sectors/track, 54721 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0004c541


  Device Boot      Start        End      Blocks  Id  System
/dev/sdc1  *          1          66      523264  83  Linux
Partition 1 does not end on cylinder boundary.
/dev/sdc2              66      54722  439024640  8e  Linux LVM


Disk /dev/sdd: 1500.3 GB, 1500301910016 bytes
255 heads, 63 sectors/track, 182401 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000


Disk /dev/sdd doesn't contain a valid partition table


Disk /dev/dm-0: 103.1 GB, 103079215104 bytes
255 heads, 63 sectors/track, 12532 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000


Disk /dev/dm-0 doesn't contain a valid partition table


Disk /dev/dm-1: 214.7 GB, 214748364800 bytes
255 heads, 63 sectors/track, 26108 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0xe34f5595


    Device Boot      Start        End      Blocks  Id  System
/dev/dm-1p1  *          1          13      102400    7  HPFS/NTFS
Partition 1 does not end on cylinder boundary.
/dev/dm-1p2              13      26109  209610752    7  HPFS/NTFS


Disk /dev/dm-2: 53.7 GB, 53687091200 bytes
255 heads, 63 sectors/track, 6527 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0xb4dcef96


    Device Boot      Start        End      Blocks  Id  System
/dev/dm-2p1  *          1          13      102400    7  HPFS/NTFS
Partition 1 does not end on cylinder boundary.
/dev/dm-2p2              13        6527    52324352    7  HPFS/NTFS


Disk /dev/dm-3: 11.8 GB, 11811160064 bytes
255 heads, 63 sectors/track, 1435 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000


Disk /dev/dm-3 doesn't contain a valid partition table


Disk /dev/dm-4: 317.5 GB, 317492035584 bytes
255 heads, 63 sectors/track, 38599 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000


Disk /dev/dm-4 doesn't contain a valid partition table


Code:

pveversion -vpve-manager: 2.2-24 (pve-manager/2.2/7f9cfa4c)
running kernel: 2.6.32-16-pve
proxmox-ve-2.6.32: 2.2-80
pve-kernel-2.6.32-16-pve: 2.6.32-80
lvm2: 2.02.95-1pve2
clvm: 2.02.95-1pve2
corosync-pve: 1.4.4-1
openais-pve: 1.1.4-2
libqb: 0.10.1-2
redhat-cluster-pve: 3.1.93-1
resource-agents-pve: 3.9.2-3
fence-agents-pve: 3.1.9-1
pve-cluster: 1.0-28
qemu-server: 2.0-62
pve-firmware: 1.0-21
libpve-common-perl: 1.0-36
libpve-access-control: 1.0-25
libpve-storage-perl: 2.0-34
vncterm: 1.0-3
vzctl: 4.0-1pve2
vzprocps: 2.0.11-2
vzquota: 3.1-1
pve-qemu-kvm: 1.2-7
ksm-control-daemon: 1.1-1


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