The cost savings are in the use and administration of the storage system that is part of the SAN and provides block data either for the SAN-attached servers or the SAN-attached gateway that provides the remote file system for IP-attached clients. The numbers are highly dependent on the environment but usually a gateway is used for consolidation of many independent file servers to a single, IT managed environment that can result in large administrative cost savings.Randy Kerns
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This was first published in February 2004