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Article Directory :: Computers & Technology Articles
Network and server downtime is costing hundreds of millions of dollars in business and productivity losses. At the same time the amount of information to be managed and stored is increasing dramatically every year.
A new concept called the Storage Area Network (SAN) could offer an answer to the increasing amount of data that needs to be stored in an enterprise network environment. By implementing a SAN users can offload storage traffic from daily network operations while establishing a direct connection between storage elements and servers.
Basically a SAN is a specialized network that enables fast , reliable access among servers and external or independent storage resources. In a SAN a storage device is not the exclusive property of any one server. Storage devices are shared among all networked servers as peer resources. Just as local area network (LAN) can be used to connect clients to servers , a SAN can be used to connect servers to storage.
A SAN doesnot need to be a physically separate network. It can be dedicated subnet carrying only business critical I/O traffic between servers and storage devices. A SAN would not carry general purpose traffic such as email or other end user applications. This type of net avoids the unaccepatable tradeoffs inherent in a single network for all applications.
What is new is that SAN architecture are now being adopted in distributed networks out of low cost SAN technologies such as Small Computer System Interface (SCSI) , Serial Storage Architecture (SSA) and Fibre Channel.
The SAN is an extended storage bus which can be interconnected using similar interconnect technologies as LAN or Wide Area Network (WAN). SAN interfaces are generally ESCON , SCSi , SSA , High Performance Parallel Inteface or Fibre Channel. It does not matter whether a SAN is called a Storage Area Network or System Area Network as the architecture is the same in either case.
SAN create a method of attaching storage that is revolutionizing the network because of the improvements in availability and performance. SAN are currently used to connect shared storage arrays , clustered servers for failover , interconnected mainframe disk or tape resources to distributed network servers and clients. In essence a SAN is nothing more than another network like a subnet but constructed from storage interfaces.
SAN enables storage to b externalized from the server and in doing so allow storage to be shared among multiple host servers without impacting system performance or the primary network.EMC already has a large installed base of SAN attached disk arrays and has achieved such a high level of customer confidence that are the standard of comparison.
Eddison Sherry had been working in Linux and other Unix flavours for long years. He had been writing blogs and article on the Linux Storage , Linux Commands , Linux Server Administration , Apache Configuration etc. You can learn to use Linux and its usage at Linux Technical Blog.
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