Definition : A SAN is a high-speed (1 to 2Gb/s data transfer rates, with the future of 10Gb/s) network with heterogeneous (mixed vendor or platforms) servers accessing a common or shared pool of heterogeneous storage devices.
SAN environments provide any-to-any communication between servers and storage resources, including multiple paths.
The parts of a SAN are:
- Client layer — The clients are the access point of a SAN.
- Server layer — The major components in this layer are the servers, the HBAs, including the GBICs, and the software drivers that enable HBAs to communicate with the fabric layer.
- Fabric layer — This is the middle layer of a SAN, the network part of a SAN, where hubs and switches tie all the cables together into a logical and physical network.
- Storage layer — This is where all the data resides on the disk drives
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