Physical View of the LVM

Terminology:

Physical Volume (PV)

Synonym for "hard disk". A single physical hard drive.

Volume Group (VG)

A set of one or more PVs which form a single storage pool. You can define multiple VGs on each AIX system.

Physical Partition (PP)

The smallest allocation unit in the LVM. All PPs within a VG are the same size, usually 4 or 8 MB.