Volume Group commands

vgscan

Scans all the disks for volume groups and rebuilds the LVM cache file, also displays the volume groups.

vgchange -a n/y my_volume_group

Deactivate/activate a volume group

vgremove my_volume_group

Removes a volume group that contains no logical volumes.

Renames a volume group

First host:

1. Set state to inactive
2. vgexport my_volume_group

Second host:

1.  vgimport my_volume_group
2. Set the state to active
   

Reference: https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/4/html/Cluster_Logical_Volume_Manager/index.html