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Baseboard Management Controller (BMC)
Baseboard Management Controller (BMC)
The Baseboard Management Controller (BMC) monitors system platform management
events and logs their occurrences in the non-volatile System Event Log (SEL). This includes
events such as over temperature and over-voltage conditions, and fan failures. The BMC
can also provide the interface to the monitored information so system management
software can poll and retrieve the present status of the platform.
The BMC also provides the interface to the non-volatile Sensor Data Record (SDR)
repository. Sensor Data Records provide a set of information that system management
software can use to automatically configure itself for the number and type of IPMI sensors
(such as temperature and voltage sensors) in the system.
The following is a list of the major functions of the BMC:
■ System power control (including providing Sleep/Wake push-button interfaces for
ACPI
■ Platform Event Paging (PEP) / Platform Event Filtering (PEF)
■ Monitoring:
■ Power Distribution Board monitoring
■ Temperature and voltage monitoring
■ Fan failure monitoring
■ Processor presence monitoring (no processors installed) and processor temperature
monitoring
■ Interlock monitoring
■ Processor core ratio speed setting
■ Speaker beep capability on standby and when system is powered up
■ Hot-plug PCI slot status reporting
■ Chassis control:
■ General fault light control
■ Chassis cooling failure light control
■ Chassis power fault light control
■ Chassis power light control
■ Chassis ID LEDs control
■ System Event Log (SEL) interface
■ Sensor Data Record (SDR) repository interface
8510702.book Page 45 Thursday, July 7, 2005 11:21 AM