Ideal for Serial Attached SCSI high performance RAID, controllers and hard drives, SAS is the next generation interface standard for SCSI-based systems. It is designed to replace the SCSI interface with much faster, more flexible. 3Gb/s serial interface. The SAS standard is designed with an infrastructure that is compatible with SATA drives giving IT managers the flexibility to choose solutions. The speed of the first generation SAS is 3.0 Gb/s, the links are duplex, which means that they send and receive information simultaneously, reducing latency.