02-28-2008
Could you please be "more or less specific" (;-)) what you want? Which information in the VGDA should match with which information in the ODM?
bakunin
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LEARN ABOUT REDHAT
vgmerge
VGMERGE(8) System Manager's Manual VGMERGE(8)
NAME
vgmerge - merge two volume groups
SYNOPSIS
vgmerge [-A|--autobackup{y|n}] [-d|--debug] [-h|--help] [-l|--list] [-t|--test] [-v|--verbose] DestinationVolumeGroupName SourceVol-
umeGroupName
DESCRIPTION
vgmerge merges two existing volume groups. The inactive SourceVolumeGroupName will be merged into the DestinationVolumeGroupName if physi-
cal extent sizes are equal and physical and logical volume summaries of both volume groups fit into DestinationVolumeGroupName's limits.
OPTIONS
-A, --autobackup y/n
Controls automatic backup of VG metadata after the merge ( see vgcfgbackup(8) ). Default is yes.
-d, --debug
Enables additional debugging output (if compiled with DEBUG).
-h, --help
Print a usage message on standard output and exit successfully.
-l, --list
Display merged DestinationVolumeGroupName like "vgdisplay -v".
-t, --test
Do a test run WITHOUT making any real changes.
-v, --verbose
Display verbose runtime information about vgmerge's activities.
Examples
"vgmerge -v databases my_vg" merges the inactive volume group named "my_vg" into the active or inactive volume group named "databases" giv-
ing verbose runtime information.
DIAGNOSTICS
vgmerge returns an exit code of 0 for success and > 0 for error:
1 2 volume group names must be entered on command line
2 volume group to merge from must be inactive
3 error reading VGDA of volume group to merge into
4 error reading VGDA of volume group to merge from
5 error setting up VGDA for merge
6 error extending VGDA by physical volume in kernel
7 error writing VGDA to physical volume(s)
8 error creating volume group special files
9 error removing volume group 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
ENVIRONMENT VARIABLES
LVM_AUTOBACKUP
If this variable is set to "no" then the automatic backup of VG metadata is turned off.
LVM_VG_MAX_BACKUPS
This variable determines the backup history depth of kept VGDA copy files in /etc/lvmconf. It can be set to a positive number
between 0 and 999. The higher this number is, the more changes you can restore using vgcfgrestore(8).
See also1
lvm(8), vgcreate(8), vgextend(8), vgreduce(8), vgsplit(8), pvmove(8)
AUTHOR
Heinz Mauelshagen <Linux-LVM@Sistina.com>
Heinz Mauelshagen LVM TOOLS VGMERGE(8)