Serial Attached SCSI technology (technology brief)

The parallel SCSI bus has been a workhorse in the data storage industry for over 20 years. The success of SCSI as an I/O interface can be attributed to its performance, intelligence, and backward compatibility. However, after years of steady performance improvements, parallel SCSI has reached technological hurdles that may be too difficult to leap. To get to the next level of performance, the industry is turning to Serial Attached SCSI (SAS).