Internal Mini SAS SFF-8643 to (4) 29pin SFF-8482 connectors with power connecting a SAS controller (SFF-8643) to four SATA/SAS disks (SFF-8482)Please note that Mini SAS (SFF-8643) is host 4 SAS 29 (SFF-8482) is target internal Mini Serial Attached SCSI x4 (SFF-8643) to (4) x1 (SFF-8482) Serial Attached SCSI (controller based) fan-out cablesBefore you buy this cable Please make sure the Mini SAS (SFF-8643) on your motherboard or RAID controller. If the Mini SAS (SFF-8643) on your backplane this cable will not work with themMini SAS (SFF-8643) connect to the controller 4 SAS connect to the HDD (hard disc driver) 30-Day return for any reason 18-month warranty Lifetime Technical support and friendly customer service