SAN

Overview

A storage area network (SAN) is a type of local area network (LAN) that can be used to store and transfer huge amounts of data. This network architecture connects remote storage devices with corresponding servers. Islands of data storage can be connected to each other and to the server with the help of a storage area network. A SAN describes the hard drive that your computer uses for data storage and that helps your server connect to hard drive data through iSCSI or Fibre Channel connections. A SAN helps facilitate the quick and easy replacement of servers in the event of a malfunction.

Benefits

A SAN is capable of increasing and improving the utility of a computer's storage capacity. It can also connect multiple servers to different storage units.

A SAN provides connectivity on a need by need basis. This is ideal if you are using a cluster of computers where different types of technologies come together. In return, your networks can extend disk and tape capabilities to several servers at once.

SANs provide tools to recover your data from disasters. They have a secondary storage array that can replicate data. This storage device has an ability to share storage facilities, providing more flexibility to store data as needs increase. You do not have to use other storage devices or cables to transfer data to another location.

Another benefit is that the servers can boot directly from the SAN, which means that faulty servers can be replaced and configured to the network quickly.

How It Works

There are five components to a storage area network: servers, SAN infrastructure, backup storage, management software, and disk storage. Various servers and workstations can be connected to a SAN. This connection can be made using Fibre Channels, Ethernet, and Serial Attached SCSI. SAN infrastructure, also known as SAN fabric, consists of hardware, software, and cables that are required for data transport to and within the SAN.

SAN systems have an extensive array of disks that store information. The data that is obtained from many servers is saved in dedicated areas known as logical unit numbers (LUN). Redundant array controllers are used for servers to access data even if one network connection or one controller fails. Storage management software automates data backup and configures individual components. The software also replicates and stores data in multiple locations in order to improve processes for data recovery.

Companies/Brands

SAN providers include IBM, HP, Sun Microsystems, Adva Optical Networking, and Apple.