Serial Attached SCSI (SAS) is the new standard which was introduced by the SCSI Trade Association to meet the ever-demanding needs of enterprise storage for high performance, high reliability and high manageability. Key end-user benefits of the standard include enterprise class robustness, investment protection in compatible SCSI software and middleware, and the choice of direct-attach storage devices (SAS or SATA). Since SAS is based on the foundation of the industry-leading SCSI specification, it will satisfy users' needs for continuity in the mission-critical application.