lo get the resource group name for that VG
==========================================
cd /usr/es/sbin/cluster/utilities/
./cllsvg

# /usr/es/sbin/cluster/sbin/cl_chfs -cspoc “-g testrg” -a size=+32768 /shfs
cws: File System size changed to 65536
#
In the above command –g for resource group
-a size is the size in block