To appreciate what a Storage Area Network (SAN) is, we need to understand why SANs came into being. Storage Area Networking has evolved as part of an ongoing effort to find more efficient methods of transporting large blocks of data and the need to share storage resources in various one-to-many models versus the historic server-bound Small Computer System Interface (SCSI) method of storage connection and data transport. As the requirements to share storage resources have increased, in many cases, this SCSI connection model no longer meets the requirements of today's 7x24x365, high data throughput enterprises.
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