In order to disable/enable MOTHER BOARDS IN SUN SERVERS ?

At the OK prompt
OK> .asr ==> show the list of components, which can be enabled/disabled
OK> asr-disable gptwo-slotb ==> disables SYS_B
OK> reset-all ==> is required after disable and enable command
OK> asr-enable-gptwo-slotb ==> enalbes SYS_B
OK> reset-all ==> is required after disable and enable command