Thanks to all who replied. Looks like there is no direct command line option to get the output I was looking for in 6.5x. But for now, Adam's suggestion should work for me:
From: Fox, Adam Adam.Fox@netapp.com Not really. This is calculated behind the scenes by FilerView. The closest thing you have via CLI is
filer> priv set diag filer*> snap stauts <vol>
Each snapshot will have an "owned blocks" column. Since each WAFL block is 4KB, multiply that value by 4KB and you'll get the space value you are looking for. Just be sure to get out of diag mode as soon as you can.
In ONTAP 7.0, there is a snap delta command which is somewhat useful. It's in standard (admin) mode and will tell you the block differences between 2 snapshots or between a snapshot and the active filesystem.
Hope this helps.
-- Adam Fox