storage area network architecture and hardware devices ppt

This led to a cumbersome, complicated, multi-server environment virtually impossible organization and secure. storage area network (SAN) that overcomes the problems by moving the storage of shared resources to network users and storage components in the course of The year and independent, high-performance network. Storage performance increases using the interface (for example, 2 Gb or 4 Gb Fibre Channel) (FC), which connects the storage servers and storage devices on the array of switches and hubs a year to form the tissue that supports both redundancy and high availability. San storage technology also supports important features including disk mirroring, backup/recovery, archive/retrieval and data migration.

San architecture and components

A storage area network is usually using three basic components: cables, host bus adapters (HBAS) and switches. The physical environment, the cable used to connect Each San device. Without the USE of an optical fiber and copper cables and, although the choice of the environment depends on the speed and the distance to the San requirements. Slower or lesser distance may be the connection made using copper cables and faster or longer distance connection is achieved through optical cables. Fiber-optic cables can be either single mode or multimode. Single-mode (or multimode) fibre, designed to carry only one light signal over long distances, while multimode fiber can carry several simultaneous signals over short distances light. Fiber also uses several different slots, so it is very important to select the connectors are compatible with the other components of that tissue.


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Each server or storage device in the San fabric, HBAS is required.The HBA can exist as either the year of the expansion card in the expansion slot on the compatible server, or it can be directly integrated into a chip or storage device.HBA offloads storage and retrieval of data is usually at the top of the local processor, increased server performance. The cables used for connecting the port adapter to the corresponding port on the switch.

This switch is used to handle and direct network traffic between devices. the switch accepts the traffic, and then sends the traffic to the port where the destination device is attached. San storage, each server and the storage device is connected to a port on the switch. relay switch traffic and specific devices throughout the San-this series of dial-up connections to form San "fabric," which is easily scaled or resized. Intelligent switch serves the same basic function, but it includes high-level features, like storage systems San virtualization, quality of service, remote mirroring, data sharing, protocol conversion and security.

Connect and San protocols

Online data storage is determined by their schemes to join also, usually falls into either FC or ISCSI. Obviously technology FC is the most popular approach for enterprise data center. FC supports communications between servers and storage devices on 2 Gb, 4 Gb, while the currently prevalent, and 10 Gb in the future is expected. FC fiber optic cables have traditionally used to connect devices and is still used for long distances. Today a short distance, the FC can be achieved with coaxial and twisted-pair copper cables. CAN FC mode between two managed devices directly (point-to-point) or network attached storage devices via a switch or arbitrated loop. FC technology is compatible with SCSI and IP protocols.