Difference between revisions of "Lvm snapshot"
From Finninday
Line 18: | Line 18: | ||
Connect the USB drive where the backup will be stored. | Connect the USB drive where the backup will be stored. | ||
+ | <pre> | ||
+ | root@weasel:/media# df | ||
+ | Filesystem 1K-blocks Used Available Use% Mounted on | ||
+ | /dev/mapper/Ubuntu-root | ||
+ | 234052488 111205240 110957996 51% / | ||
+ | varrun 514528 408 514120 1% /var/run | ||
+ | varlock 514528 0 514528 0% /var/lock | ||
+ | udev 514528 92 514436 1% /dev | ||
+ | devshm 514528 0 514528 0% /dev/shm | ||
+ | lrm 514528 43040 471488 9% /lib/modules/2.6.24-19-generic/volatile | ||
+ | /dev/mapper/vg00-big 240361984 195076932 33075288 86% /big | ||
+ | /dev/sdd1 484535504 238344264 221772040 52% /media/disk | ||
+ | </pre> | ||
+ | The USB disk was automounted on /media/disk. | ||
Do the backup. | Do the backup. | ||
+ | time dd if=/dev/Ubuntu/root-snap of=/media/disk/weasel-root.dd | ||
Verify the backup and disconnect the USB drive. | Verify the backup and disconnect the USB drive. | ||
Destroy the snapshot. | Destroy the snapshot. |
Revision as of 06:26, 25 June 2008
First, I added a new disk and did a pvcreate on it. Then I added the new disk to the same volume group that the root partition is in, namely "Ubuntu".
Command to create an lvm snapshot in order to do a backup of the root partition.
lvcreate -L250G -s -n root-snap /dev/Ubuntu/root
root@weasel:~# lvscan File descriptor 5 left open File descriptor 6 left open File descriptor 7 left open File descriptor 8 left open ACTIVE '/dev/vg00/big' [232.88 GB] inherit ACTIVE Original '/dev/Ubuntu/root' [226.77 GB] inherit ACTIVE '/dev/Ubuntu/swap_1' [5.88 GB] inherit ACTIVE Snapshot '/dev/Ubuntu/root-snap' [250.00 GB] inherit
Connect the USB drive where the backup will be stored.
root@weasel:/media# df Filesystem 1K-blocks Used Available Use% Mounted on /dev/mapper/Ubuntu-root 234052488 111205240 110957996 51% / varrun 514528 408 514120 1% /var/run varlock 514528 0 514528 0% /var/lock udev 514528 92 514436 1% /dev devshm 514528 0 514528 0% /dev/shm lrm 514528 43040 471488 9% /lib/modules/2.6.24-19-generic/volatile /dev/mapper/vg00-big 240361984 195076932 33075288 86% /big /dev/sdd1 484535504 238344264 221772040 52% /media/disk
The USB disk was automounted on /media/disk.
Do the backup.
time dd if=/dev/Ubuntu/root-snap of=/media/disk/weasel-root.dd
Verify the backup and disconnect the USB drive.
Destroy the snapshot.