on AIX.

lsvg : list of all volume groups
lsvg <vg> : info about a volume group
lsvg -l <vg>: list of all logical volumes in a volume group
lsvg -p <vg>: list of all physical volumes in a volume group

df : list of all mounted(!) filesystems
gives following info
Filesystem device name
512-blocks total number of 512-byte blocks
Free free blocks
%Used % off blocks used
Iused number of inodes used
%Iused % off inodes used
Mounted on mount point of filesystem
or use df -k to have info in Kbytes


Hope this helps
Gert