Understanding The Basic Difference Between NAS, DAS And SAN

There are different kinds of storage options and each one of them provides advantages of their own. Following is the difference between NAS with two particular storage alternatives; directly-attached storage (DAS) and storage-area network (SAN) and how they facilitate each user in a distinct way.


While NAS is a committed file storage that allows multiple users and heterogeneous client devices to utilize data from a common disk capacity or from a device that is connected to the similar network, DAS or directly-attached storage works a little differently. DAS is also a committed server or a dedicated storage device which on the contrary, is not connected to a network. To elaborate more, DAS is merely an extension of a current server and may not be networked. A common example of DAS would be a computer’s hard drive.

While both NAS and SAN can substantially increase the storage size by RAID or clustering, DAS functions better than NAS when it comes to computer-related software. Furthermore, installing DAS is also easier as compared to NAS as all a user has to do is buying the drives that he needs to attach to the insert. See  https://monserveurnas.com to know more about what NAS features. Furthermore, when connected to a server, NAS has a better performance than SAN and also renders the advantage of sharing storage with several users.


While NAS works by offering both storage and a file system, SAN (storage area network) offers only storage and that too block-based, leaving the clients to deal with the file system. To put it more simply, SAN works on various storage alternatives on a liberated, advanced network.

Another difference commonly observed between NAS and SAN is that the former organizes I/O requests for separate files whereas the latter handles the similar requests on adjacent units of data.