Network Attached Storage (NAS) is a network storage solution specifically developed for the storage of network data. A NAS server uniformly connects all the storage devices of network data, and the capacity of NAS storage can be flexibly expanded. Furthermore, the NAS server independently processes the network storage, which cause no adverse influence on the performance of existing network servers. Therefore, the NAS system is of easy deployment, high cost effectiveness, high extensibility, and low TCO.
Different from SAN, the NAS system employs storage controllers that support various network file access protocols (such as NFS and CIFS), supports the different types of operating systems to share one storage partition, and realize the file sharing across platforms.