Chapter 4. Installing and Configuring the Clustered Logical Volume Manager (CLVM)
CLVM requires only one RPM, lvm2-cluster-2.02.01-1.2.RHEL4.x86_64.rpm, and this must be installed on all seven nodes. The lock servers must be able to see the cluster logical volumes, but do not need to mount the GFS volumes.
ALL GULM lock servers must have all of the shared storage mounted and must have CLVM installed, configured, and running.