HP EH417AA, Serial Attached SCSI, PCI Express x4, 0, 1, 1E, 6.6" (167.6 mm), 2.5" (63.5 mm), 17.6 oz (500 g) HP EH417AA. Supported storage drive interfaces: Serial Attached SCSI, Host interface: PCI Express x4. RAID levels: 0, 1, 1E. Width: 6.6" (167.6 mm), Depth: 2.5" (63.5 mm), Weight: 17.6 oz (500 g)