CableCreation Internal Mini SAS SFF-8643 to (4) 29pin SFF-8482 connectors with SATA Power,1M Internal Mini SAS SFF-8643 to (4) 29pin SFF-8482 connectors with IDE Power 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 cables Before 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 them Mini SAS (SFF-8643) connect to the controller, 4 SAS connect to the HDD (Hard Disc Driver) Connecting a SAS controller (SFF-8643) to four SATA/SAS disks (SFF-8482)