Network attached storage is data storage device, typically attached to computer via a network, such as RAID or hard drive and provides data access to different client. Network attached storage devices are typically connected via an IP network and support file based storage. With NAS, storage needs not be physically present under the same roof ; it is out at a different site to avoid any risks of disasters.NAS provides both storage and file system. The benefit of NAS is the ability to provide more than one clients on the network with access to the same files.
SAN, storage area network, provides only block based storage and file system concerns are handled by the client . SAN and NAS are not mutually exclusive and are generally combined in hybrid architecture to provide both file level and block level storage. The main difference between NAS and SANs is that NAS handles input and outputs requests for individual files, whereas a SAN handles I/O for contiguous blocks of data.
NAS and SAN plays a vital role in any disaster recovery plan by
Protecting valuable information assests.
Keeping downtime to minimum.
Providing ability to store backup at an offsite location to avoid any physical damage to data.
Providing the ability to store data, coupled with cloud storage.
Providing central and management for the data.
Providing complete data protection
Providing Secure online storage at redundant locations around the country.
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