SAN vs NAS
SAN vs NAS, The primary difference between SAN and NAS solutions is the type of access protocol.
NAS protocols such as NFS and CiFS provide shared file level access to storage resources. The management of the file system resides with the NAS device.
SAN protocols such as iSCSI and fibre channel (FC) provide block level access to storage resources. Block level devices are accessed by servers via the SAN, and the servers manage the file system.
Despite their differences, SAN and NAS are not mutually exclusive, and may be combined in multi-protocol or unified storage arrays, offering both file-level protocols (NAS) and block-level protocols (SAN) from the same system. The best of both worlds!