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Howto clone/migrate a volume in the SAN

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Operating Systems Linux Howto clone/migrate a volume in the SAN
# 1  
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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LEARN ABOUT REDHAT

vgdisplay

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

NAME

       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 <Linux-LVM@Sistina.com>

Heinz Mauelshagen						     LVM TOOLS							      VGDISPLAY(8)