Category Proliant ControllerSub-Category HBAGeneration H221Part Number 729552-B21Products ID 200390Manufacturer HPDisk and Enclosure Protocol 6Gbps SAS / 6Gbps SATASAS Connectors 2x4 External SFF-8088 (Mini-SAS)Data Transfer Method 600MB/s Bandwidth Per PortPCIe Bus Speed PCIe 3.0 x8 (8GT/s Max)Port Transfer Rate 24Gb/s per x 4 Wide (4 x 6G)Maximum Capacity 384TB SAS/SATAMemory Addressing 64-bit Server Memory > 4GB