Howto clone/migrate a volume in the SAN


 
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Operating Systems Linux Howto clone/migrate a volume in the SAN
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Old 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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vgremove(1M)															      vgremove(1M)

NAME
vgremove - remove LVM volume group definition from the system SYNOPSIS
vg_name ... Remarks If a combination of volume groups version 1.0 and 2.0 or higher arguments are supplied, then the arguments might not be processed in the order they are listed on the command line. DESCRIPTION
The command removes from the system the last physical volume of the volume group and the definition of the volume group or groups specified by vg_name .... Since all system knowledge of the volume group and its contents are removed, the volume group can no longer be accessed. To move a volume group from one system to another, use the command instead (see vgexport(1M)). Before executing remove all logical volumes residing on the last physical volume by executing (see lvremove(1M)). Before removing a volume group, two steps are necessary: 1. Remove all the logical volumes belonging to the group by using the command (see lvremove(1M)). 2. Remove all but one physical volume belonging to the volume group by using the command (see vgreduce(1M)). If there is any physical volume group created under vg_name ..., the physical volume group information is also removed from file Options and Arguments recognizes the following option and argument: For each volume group removed, also remove its volume group directory and file vg_name The path name of a volume group. EXTERNAL INFLUENCES
Environment Variables determines the language in which messages are displayed. If is not specified or is null, it defaults to "C" (see lang(5)). If any internationalization variable contains an invalid setting, all internationalization variables default to "C" (see environ(5)). EXAMPLES
Remove volume group from the system: SEE ALSO
lvremove(1M), vgchange(1M), vgreduce(1M). vgremove(1M)