Close view of Supermicro BPN-SAS3-213A SAS disk backplane showing SFF-8643 (mini-SAS HD) connector. This backplane supports 16 SAS/SATA 2.5" HDDs and has 4 SFF-8643 (4x SAS3, mini-SAS HD) on the back side and 16 SFF-8482 connectors on the front side.