I want to talk to the SAN-centric folks out there; the ones that don't have any NAS [network attached storage]...
to speak about. SAN [storage area network] environments actually have tons of file data stored on their Tier 1 storage and secondary storage, even though it's all iSCSI or Fibre Channel based. And, all of those file servers in the organization are essentially NAS systems -- single file servers talking in a NAS protocol. You can consolidate those systems using virtual server technology, NAS systems or virtual NAS or FAN [file area nework] systems, but many SAN folks aren't even thinking about that today. NAS and FAN products are being sold to NAS users, but rarely are they being marketed to file server environments.
Check out the entire NAS FAQ guide.