Intel® Server System Server System "Emerald Ridge ... - CTL

錯 誤 ! 尚 未 定 義 樣 式 。錯 誤 ! 尚 未 定 義 樣 式 。 EPS3.34 Component Fault LED ControlSeveral sets of component fault LEDs are supported. Some LEDs are owned by the BMC andsome by the BIOS.The BMC owns control of the following FRU / fault LEDs:Fan fault LEDs – A fan fault LED is associated with each fan. The BMC lights a fan faultLED if the associated fan tach sensor has a lower critical threshold event status asserted.Fan tach sensors are manual rearm sensors. Once the lower critical threshold is crossed,the LED remains lit until the sensor is rearmed. These sensors are rearmed at system DCpower-on and system reset. Whenever any of fan fault LED glows, the Global Fan FaultLED also glows; refer to Section 3.27-Global Fan Fault LED for more details on this.DIMM fault LEDs - The BMC owns the HW control for these LEDs. The LEDs reflect thestate of BIOS-owned event-only sensors. When BIOS detects a DIMM fault condition, itsends an IPMI OEM command (Set Fault Indication) to the BMC to instruct the BMC to turnon the associated DIMM Fault LED. These LEDs are only active when the system is in the‘on’ state. The BMC will not activate or change the state of the LEDs unless instructed bythe BIOS.BIOS must send updated fault( or clear fault) every time after POST, DIMM LEDstate doesn’t change during AC reset3.34.1 Set Fault Indication CommandThe Set Fault Indication command can be used by satellite controllers and system managementsoftware to communicate fan, temperature, power, and drive fault states to the BMC. The BMCconsolidates the state with its own system state when determining the overall system health. Ituses this consolidated state to set the front panel indicator LED states and to control otherbehavior, such as fan boosting.The Set Fault Indication command has a source field that allows the BMC to track the faultstates of multiple sources. Each source must use a separate unique source ID. For example,hot-swap controller 0 is represented by ID 1. Hot-swap controller 1 is represented by ID 2.The fault state of each source is tracked independently. Whenever a source sets the fault statefor a particular fault type, such as fan or power, the new state overrides the previous state. Thetracked fault state is cleared when the server is powered up or reset.52Intel ConfidentialRevision 1.1