Methods and structure for identifying support for super-standard features in communications between serial attached SCSI devices

摘要

Methods and structure for determining compatibility between a pair of SAS devices for support of super-standard features of the devices. Features and aspects hereof provide for exchange of information between a first and second SAS device using SAS protocol in non-standard manners. The exchanges are designed to exchange information between compatible, enhanced device without causing protocol violation errors in either the first or second devices. The information exchanged represents super-standard features supported by each device. Mutually supported super-standard features are enabled for further communications between the devices. If no super-standard features are mutually supported or if the second device is non-enhanced, no super-standard features are enabled in further communications between the devices.