Red Hat GLOBAL FILE SYSTEM 5.0, Administrator'S Manual

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vgrename /dev/vg02 /dev/my_volume_group
vgrename vg02 my_volume_group
3.13. Moving a Volume Group to Another System
You can move an entire LVM volume group to another system. It is recommended that you use
the
vgexport
and
vgimport
commands when you do this.
The
vgexport
command makes an inactive volume group inaccessible to the system, which
allows you to detach its physical volumes. The
vgimport
command makes a volume group
accessible to a machine again after the
vgexport
command has made it inactive.
To move a volume group form one system to another, perform the following steps:
1. Make sure that no users are accessing files on the active volumes in the volume group, then
unmount the logical volumes.
2. Use the
-a n
argument of the
vgchange
command to mark the volume group as inactive,
which prevents any further activity on the volume group.
3. Use the
vgexport
command to export the volume group. This prevents it from being
accessed by the system from which you are removing it.
After you export the volume group, the physical volume will show up as being in an exported
volume group when you execute the
pvscan
command, as in the following example.
[root@tng3-1]# pvscan
PV /dev/sda1 is in exported VG myvg [17.15 GB / 7.15 GB free]
PV /dev/sdc1 is in exported VG myvg [17.15 GB / 15.15 GB free]
PV /dev/sdd1 is in exported VG myvg [17.15 GB / 15.15 GB free]
...
When the system is next shut down, you can unplug the disks that constitute the volume
group and connect them to the new system.
4. When the disks are plugged into the new system, use the
vgimport
command to import the
volume group, making it accessible to the new system.
5. Activate the volume group with the
-a y
argument of the
vgchange
command.
6. Mount the file system to make it available for use.
Chapter 4. LVM Administration with CLI Commands
32