AS technology enables SCSI interface solutions beyond Ultra320 to the next-generation Direct Attach Storage enterprise server, storage systems, and high-performance workstation markets while retaining device-level backward compatibility.
The SAS standard defines a device-level enterprise storage interface incorporating SCSI command sets, serial point-to-point interconnections, dual porting, increased addressability and the ability to scale to small form factors. Because the SAS physical layer is compatible with Serial ATA (SATA), users will have the choice of populating their systems with SAS or SATA hard disk drives, or a combination of both.
...from a joint press release by LSI Logic and Tabernus