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Topic SAN implementation over Gigabit Ethernet Problem Description A storage area network SAN is a dedicated centrally managed secure information infrastructure which enables any-to-any interconnection of servers and storage systems A SAN can be configured to provide a nearly infinite pool of storage that you can grow and move between servers as they need it The storage can be added to and removed without requiring the server to be rebooted The services provided by the server continue to operate without interruption The primary purpose for implementing a SAN is to provide a large storage pool that multiple hosts could access Common storage configurations involve direct attachment of storage to a host This storage is only available for use by that host If there were another host that needed storage you would need to buy additional storage to install on that host The host with excess capacity would not be able to share its storage with another host Description of Technology In a SAN all networked devices share storage capacity as peer resources they are not the exclusive property of any one server You can use a SAN to connect servers to storage Servers to each other and storage to storage through hubs or switches A SAN carries only IO traffic between servers and doesnt carry any general-purpose traffic such as e-mail Storage area networks remove data traffic like backup processes from the production network giving IT managers a strategic way to improve system performance and application availability As SAN technology develops it is growing beyond the use of any one kind of technology A SAN can be configured to use a number of protocols such as IP or Fiber Channel over a network medium like Ethernet or ATM Fiber Channel over Ethernet supports up to 106 Mbps Emerging standards that are still being defined include Gigabyte System Network GSN which promises full-duplex 64 Mbps error free SGI Networks Storage area networks
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