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!!

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VGDISPLAY(8)						      System Manager's Manual						      VGDISPLAY(8)

vgdisplay - display attributes of volume groups SYNOPSIS
vgdisplay [-A|--activevolumegroups] [-c|--colon] [-d|--debug] [-D|--disk] [-h|--help] [-s|--short] [-v[v]|--verbose [--verbose]] [--ver- sion] [VolumeGroupName...] DESCRIPTION
vgdisplay allows you to see the attributes of VolumeGroupName (or all volume groups if none is given) with it's physical and logical vol- umes and their sizes etc. OPTIONS -A, --activevolumegroups Only select the active volume groups. -c, --colon Generate colon seperated output for easier parsing in scripts or programs. The values are: 1 volume group name 2 volume group access 3 volume group status 4 internal volume group number 5 maximum number of logical volumes 6 current number of logical volumes 7 open count of all logical volumes in this volume group 8 maximum logical volume size 9 maximum number of physical volumes 10 current number of physical volumes 11 actual number of physical volumes 12 size of volume group in kilobytes 13 physical extent size 14 total number of physical extents for this volume group 15 allocated number of physical extents for this volume group 16 free number of physical extents for this volume group 17 uuid of volume group -d, --debug Enables additional debugging output (if compiled with DEBUG). -D, --disk Show attributes from the volume group descriptor area on disk(s). Without this switch they are shown from the kernel. Useful if the volume group isn't activated. -h, --help Print a usage message on standard output and exit successfully. -s, --short Give a short listing showing the existence of volume groups. -v, --verbose Display verbose information containing long listings of physical and logical volumes. If given twice, also display verbose runtime information of vgdisplay's activities. --version Display version and exit successfully. DIAGNOSTICS
vgdisplay returns an exit code of 0 for success and > 0 for error: 1 error reading VGDA 2 volume group doesn't exist 3 not all physical volumes of volume group online 4 volume group not found 5 no volume groups found at all 6 error reading VGDA from lvmtab 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 SEE ALSO
lvm(8), pvcreate(8), vgcreate(8), lvcreate(8) AUTHOR
Heinz Mauelshagen <> Heinz Mauelshagen LVM TOOLS VGDISPLAY(8)

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