I just don't want to have turned off snapshots, but still have the filer reserving space for them (I know this sounds kooky but I don't know if the microkernel will automatically save the space reguardless.)
snap sched volname 0 0 0 snap reserve volname 0 vol options volname nosnap on vol options volname nosnapdir on
Hope you don't plan on doing any backups. Otherwise you mighty want to leave nosnapdir off and set a small reserve so you can do backups even when your filesystem is full.
Bruce