The following link helps us in knowing the LV, PV , PP and VG.
http://publib.boulder.ibm.com/infocenter/pseries/v5r3/index.jsp?topic=/com.ibm.aix.cmds/doc/aixcmds5/tar.htm
LV - Logical VolumePV - Physical VolumePP - Physical PartitionVG - Volume Group
-- Cheers,Ramesh.