Network Attached Systems (NAS) enable users to store and share data over a local area network (LAN). With NAS, additional storage capacity can be easily provided to organizations of any size by simply attaching NAS systems to an existing LAN.

Storage Area Network (SAN) which is a high–speed dedicated network that connects data storage devices with the respective data servers.

The amount of information stored on magnetic media is doubling every year, and managing storage in general purpose servers is getting more expensive and complex. NAS server is preferred implementation for serving files, because it is easier to implement and manage, and it provides much better I/O performance over general–purpose servers.

The data stored on NAS and SAN server systems in today's computerized network environment is nothing but falling short of making data storage more critical. Many businesses solely depend on these servers to keep their businesses running smoothly. When one of these servers fails, it can lead to significant hourly financial loss, and in extreme cases can even lead to complete business failure.