San Implementation Essay

1199 words - 5 pages

SAN implementation over Gigabit Ethernet

A Storage Area Network is virtualized storage.

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.
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 I/O traffic between servers and doesn’t 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 Fibre Channel over a network medium like Ethernet or ATM. FC over Ethernet supports up to 1.06 Mbps. Emerging standards that are still being defined include Gigabyte System Network(GSN) which promises full-duplex 6.4 Mbps over a 40 meter copper cable.
Storage area networks improve data access. Using Fibre Channel connections, SANs provide the high-speed network communications and distance needed by remote workstations and servers to easily access shared data storage pools. IT managers can more easily centralize management of their storage systems and consolidate backups, increasing overall system efficiency. The increased distances provided by Fibre Channel technology make it easier to deploy remote disaster recovery sites. Fibre Channel and switched fabric technology eliminate single points of failure on the network. With a SAN, virtually unlimited expansion is possible with hubs and switches. Nodes can be removed or added with minimal disruption to the network.
What is Gigabit Ethernet.
Gigabit Ethernet supports 1000 Mbps over Ethernet media. Because it is similar to existing Ethernet and Fast Ethernet standards in that it uses the same frame format and collision detection mechanisms, Gigabit Ethernet is easy to integrate with existing Ethernet networks. It was designed as...

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