typically not in heterogeneous environments. NAS servers support
locking mechanisms for multiple NFS protocols, allowing file systems to
be safely shared in heterogeneous environments.
One of the biggest advantages of NAS over file servers is scalability. An
enterprise NAS array has multiple internal device buses to
accommodate many disks with high performance and high availability.
NAS has its scalability issues—it’s generally not as scalable as SAN
storage—but it is a lot more scalable than adding external RAID arrays
to a file server.