The Arup Nanda Blog

Storage Area NetworkA storage area network (SAN) is any high-efficiency network whose primary goal is to allow storage devices to communicate with pc systems and with every other. This architecture actually isn’t much various than it would be if the file server were working with direct attached storage. The storage guys are partnering with the network and server guys to produce the data center developing blocks of the future. The network is made use of to move data among the several storage devices, allows sharing data between unique network servers, and offers a rapidly connection medium for data backup and restoration and information archiving and retrieval. SCSI technologies uses parallel cabling which severely limits speed, distance and the quantity of attached storage devices.

It remains to be seen regardless of whether these developments are in the end a good thing for the storage guys, as the folks who make each servers and storage may possibly have a leg up in giving standardized options with one help point of view.

The smarter information center with the enhanced economics of IT can be accomplished by connecting servers and storage with a higher-speed and intelligent network fabric. A unified SAN takes this idea a step further by exposing not only dedicated logical unit numbers ( LUNs ) – like any other SAN – but file method-based, NAS-like storage. NAS devices will continue to perform their precise functions but shall migrate, more than time, to the Storage Area Network model. Before the advent of SANs, organizations frequently utilized direct-attached storage (DAS).

This reduces the excess capacity essential for every single server, enables administrators to centralize storage management, and enables storage sources to be swiftly reallocated to various servers. The file server is connected to the SAN in a way that makes it possible for the storage to be treated as regional. SAN devices are disk arrays positioned on a network storage device shared with a number of servers-up to 16 servers, for these models. The users communicate with the file server’s operating system and it is the operating program that hands off disk requests to the storage subsystem.

For enterprises of all sizes, the next large evolution is toward virtualization of server and storage infrastructure. Greater availability to storage by use of many access paths: A SAN makes it possible for for multiple physical connections to disks from a single or several servers. It really is finding scary out there for the SAN folks, as as soon as every little thing is incorporated in modular racks as aspect of the POD, then the job of allocating and managing storage may possibly fall to the server or network admins in the future. This is a storage mechanism that you are connecting to the network, usually with an ethernet connection.