01-30-2008
Howto clone/migrate a volume in the SAN
Dear Srs,
I have a Linux server (linux01) booting from SAN with a volume in a Nexsan SATAbeast storage array (san01). The disk/volume has four ext3 partitions, total size is near to 400GB, but only 20-30GB are in use.
I need to move this disk/volume to another Nexsan SATAbeast storage array (san02). SATABeast GUI is very simple.. and I haven't any option to migrate, clone, move, etc.. so I need to make this with other tools ;-(
What is the recommended method to make this? I have make this operations early with UNIX tools like rsync, dd, cpio, tar, etc..
I'm planning to use a second Linux server, linux02, and give access to old volume in san01 and the new volume in san02, and clone hard disk in this server. After cloning the drive, re-configure boot from SAN to boot from the new storage array, san02.
I'm looking for a more simple tool to make this type of operations, perhaps a front-end such as G4L, Partimage, Mondo-Mindi, etc..
dd can be a good and simple method, but whats happens when source and destination disk has different size?
Thanks for all the comments and advices!!
Regards,
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LEARN ABOUT REDHAT
vgimport
VGIMPORT(8) System Manager's Manual VGIMPORT(8)
NAME
vgimport - make volume groups known to the system
SYNOPSIS
vgimport [-d|--debug] [-f|--force] [-h|--help] [-v|--verbose] VolumeGroupName PhysicalVolumePath [PhysicalVolumePath...]
DESCRIPTION
vgimport allows you to make a volume group known to the system which has previously been exported (see vgexport(8) ) on this or another
system.
OPTIONS
-d, --debug
Enables additional debugging output (if compiled with DEBUG).
-f, --force
Force import of volume group even though it is not flagged exported. This option allows the importing of volume groups from broken
systems.
-h, --help
Print a usage message on standard output and exit successfully.
-v, --verbose
Display verbose runtime information about vgimport's activities.
Examples
"vgimport myvg /dev/sd[b-h]5" tries to make new volume group "myvg" known to the system. The previously exported volume group (see vgex-
port(8) ) resides on disk partitions "/dev/sdb5" to "/dev/sdh5".
DIAGNOSTICS
vgimport returns an exit code of 0 for success and > 0 for error:
1 no volume group name on command line
2 invalid volume group name
3 no physical volume(s) on command line
4 volume group already exists
5 physical volume occurs mutiple times on command line
6 invalid physical volume name
7 error reading physical volume
8 physical volume is not exported
9 error reallocating memory
10 error allocating memory
11 no valid physical volumes found
12 physical volume belongs to a different exported volume group
13 wrong number of physical volumes
14 error reading VGDA from disk(s)
15 VGDA is inconsistent
16 invalid logical volume count
17 error getting a free volume group number
18 error writing VGDA to physical volumes
19 error creating VGDA in kernel
20 error inserting volume group into lvmtab
21 error doing backup of VGDA to disk
22 error storing VGDA in lvmtab
23 not enough free logical volume manager block specials available
95 driver/module not in kernel
96 invalid I/O protocol version
97 error locking logical volume manager
98 invalid lvmtab (run vgscan(8))
99 invalid command line
Example
"vgimport this_import /dev/sdk3 /dev/sdj4" tries to import a volume group contained on both partitions. The volume group this_import may
not already exit. You have to specify all physical volumes belonging to the exported volume group.
See also
lvm(8), lvcreate(8)
AUTHOR
Heinz Mauelshagen <Linux-LVM@Sistina.com>
Heinz Mauelshagen LVM TOOLS VGIMPORT(8)