Please note it's NOT a RAID Controller Support connection up to 24 HDD via 6x SFF-8087 connection ports Supports SAS and SATA data transfer rates of 1.5, 3, and 6Gb/s and incorporates enhanced features. The SAS expander provides large storage environments the ability to connect multiple targets and initiators through a switched device for scalability and fault tolerant pathredundancy to improve system reliability ideal for today's data center and storage subsystems. The expander is ideal for high availability and scalable server clustering environments and front-end storage subsystems used in clusters, SAN, and NAS environments. 6 and 3Gb/s SAS 6.0, 3.0, and 1.5Gb/s SATA based on LSI 6Gb SAS2x36 and SAS 2008 expander