This SAS cable can be used to connect internal devices, e.g. a hard disk with SAS 29pin connector to a controller with Slim SAS SFF-8654 4i connector.
It can't work for SATA Host to SFF-8654 target. It is not reversible.
The cable only work for SFF-8654 SAS/SATA function card, Not work for SFF-8654 PCIE Card.
Ultraport SlimSAS Cable Assembly, Slim SAS Straight to SAS 29pin; Applications for Servers,Data Storage,Workstation;Meet PCIe Gen3 and SAS4.0 specification.
Connector 1: Slim SAS 4i 38pin;Connector 2: SAS 29pin