I'm curious about accounting for the disk space on our filer, which has 19 "4gb" data disks.
Naively multiplying 19 disks * 4000 mb/disk * 1024 kb/mb gives 77824000 kb.
Now subtract 10% for the FFS-ish reserve space; that leaves 70041600 kb.
df on the filer shows 69682640 kb for / and /.snapshot combined. That leaves 358960 kb -- what did I overlook? Inode space?