Areca high-performance PCI-Express bus to SATA RAID host adapters support 16 SATA ll peripheral devices on a single host adapter. SATA RAID controller has the same RAID kernel of its field-proven external RAID controllers. Applications that benefit most features from these controllers including NAS, server RAID solutions, web server, supercomputing, near-line backup, security systems and streaming and streaming applications server. The ML version comes with Min SAS 4i internal connector. This Min SAS 4i (SFF-8087) connector has eight signal pins to support four SATA drives and six pins for the SGPIO (Serial General Purpose Input/Output) side-band signals. The SGPIO bus is for efficient LED management and for sensing drive locate status, without any discrete fault activity cable needed.