It255 Unit 1 Research Paper

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Jermaun embry IT255-Storage Area Network SANs (Storage Area Networks) The technical description of a storage area network (SAN) is a collection of computers and storage devices, connected over a high-speed optical network and dedicated to the task of storing and protecting data. In a nutshell, you use a SAN to store and protect data. Today, 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 Fibre Channel. (A protocol is a set of rules used by the computer devices to define a common communication language.) More and more, regular Internet provider (IP)-based networks, such as the Internet, are being used as the network part…show more content…
This is where the fiber optic cables are. On top of the physical layer are the software layers that make up the protocol stack. In an FC SAN, those layers make up the Fibre Channel protocol. Every network uses a different protocol. The Internet uses a protocol stack called the Transmission Control Protocol/Internet Protocol (TCP/IP). Both the Internet or a SAN can use fiber optic cables to transmit data. Fiber optic cables use light pulses to transmit data over the cable, which makes data move very fast. The only difference between regular fiber optic computer networks such as the Internet and a fiber optic storage area network such as a SAN is how the devices talk to each other over the network. SAN uses the Fibre Channel protocol, and the Internet uses the TCP/IP protocol. How SAN makes computing different Using a SAN can really change how you think about computing. In the past, you had the mainframe, which was a gigantic computer that could run all the programs in a large business. All the computer stuff was gathered in one place called a data center. All the storage that the mainframe needs was directly connected to it. Everything was located and managed as a single, large…show more content…
Sure, users could share files over a LAN, but you still needed a way to share access to the physical disks in every server. Hence the advent of the SAN. Most high-performance applications need block-based access to store data on disk drives. The TCP/IP network protocol in a LAN does not natively provide a way to access the disk drives. In a SAN, all the disk drives are stored in a dedicated storage device — a disk array. All the servers connect to the storage device over a high-speed network that uses the Fibre Channel protocol, which enables access to disks over a network. Using a SAN gives businesses the ability to consolidate access to data storage plus the ability to connect servers to that storage from anywhere on the network. Putting a SAN in place makes the server computers less important. Servers become more peripheral to the data that's stored in the SAN. After all, the data is what is important to your business. If you lose a server, you can buy a new one. If you lose your data, it's "Adios, amigo," for your

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