I didn't say anything about NFS. Filesystems clustered over multiple separate computers providing automatic failover if a few of the computers die are more interesting. Of course that assumes that they work correctly - I don't have personal experience with them yet.
In this modern day and age, CPUs are much more reliable than the underlying file store. It makes no sense to have backup CPUs to cover a CPU failure if a single event can destroy the entire filesystem.
-- Mark --
http://staff.washington.edu/mrc Science does not emerge from voting, party politics, or public debate. Si vis pacem, para bellum.
