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Accusys, the manufacturers of ExaSAN, is a world leader in design, manufacturing and marketing of RAID products. Beginning with DAS (Direct Attached Storage) products based on 10Gb/s PCIe1.1, Accusys produced PCIe switches that allow up to 12 client workstations share storage at speeds exceeding fibre channel storage capabilities. Then followed a broad line of high speed, expandable family of PCIe 2.0 storage and switches called ExaSAN. The PCIe 2.0 protocol supports 20Gb/s speeds allowing a single ExaSAN 12bay RAID system to provide up to 1200MB/s data rate per channel in a SAN (Storage Area Network) environment or when configured as DAS.