IBM’s Storage Area Network (SAN) devices and solutions furnish extensible, spectrum and integrated SMB and business storage area solutions with multi-protocol local, incorporated and comprehensive storage networking proficiency.

Storage area network (SAN) is a grouping of storage devices and computers , linked over a fast-speed optical network and assigned to the work of storing and protecting data.

On the contrary, you use a SAN to store and protect data. Now a Days, that high-speed network usually consists of optical fiber cables and switches that use light waves to transmit data with a connection protocol known as Fiber Channel. (A protocol is a set of regulations  used by the system devices to define a common transmission language.) More and more regular Internet provider (IP) established networks, such as the Internet, are being used as the network part of a SAN.

The process of using a network to create a shared pool of storage devices is what makes a SAN different. The network is used to transfer data among the different storage devices, permit sharing data between different network servers, and supply’s a fast connection medium for data backup and restoration and data archiving and retrieval. Devices in a SAN are usually grouped closely together in a single room, but the network permits  the devices to be connected over long distances. The capacity to spread everything out over long distances makes a SAN very useful to big companies with many offices.

The advantages of using a SAN are many because a SAN usually has a very high return on investment, makes the total value of ownership of computing les, and has a pay-back time period based in months instead of years.

The Following  lists some of the ways you can judge a SAN to be beneficial.

Removes the distance limits of SCSI-connected disks: The maximum length of a SCSI bus is about 25 meters. Fiber Channel SAN let you to connect your disks to your servers over much greater distances.

Greater performance: Fibre Channel SAN accept connection to disks at up to 200 megabytes per second nowadays, with speeds of up to 1 gigabyte per second in the near future.

More Raised disk usage: SAN enables more than one server to access the same physical disk, which lets you allocate the free space on those disks more effectively.

High accessibility of storage by use of multiple access paths: A SAN allows for multiple physical connections to disks from a single or multiple servers.

Deferred disk Acquisition: You can use disk space more effectively, no space goes  waste, thus you don’t need to buy disks as often as you used to.

Reduced data center rack/floor area: You don’t need to purchase big servers with room for lots of disks, you can buy fewer, smaller servers, which occupies less room space.

New disaster recovery capabilities: This is a major advantage. SAN devices have the capability to mirror the data on the disks to other location. This can protect your data safe if a disaster occurs.

Online restoration: By using online mirrors of your data in a SAN device, you can instantly recover your data if it becomes corrupt.

Improved staff utilization: SAN enable fewer people to manage much more data.