You could also use it to separate LUNs based on user or host - this has been available since release 24.  glen
I'm a longtime NavaMgr user but I never noticed that I could create my own folders under  the Lun Folders area until I started playing around with Unisphere. When would I create my own folder(s) under the Lun Folders area? 
Lun folders in Navisphere Manager