this will show you the sizes of the disks that are "set up" in the system.
# for i in `lspv|awk '{ print $1 }'` ; do
> echo $i
> lspv $i | grep "TOTAL PPs" | awk '{ print $4,$5 }'
> done
As far as the disks that have not been set up logically, try this.
# lsdev -Cc disk | grep -v "Available"
crowe