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Chapter 17 PHP I/O Baseboard: Description/Setting Configuration Jumpers
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Front Panel Controller (FPC)
Where located: on the front panel board
What it manages:
• server power control consolidation from several sources
push-button power signal from the front panel connector
real-time clock (RTC)
server monitor module (SMM), if installed
commands from the Intelligent Platform Management Bus (IPMB)
• power and reset switch interfaces
• fault LEDs
• chassis, midplane and power supplies Field Replacement Unit (FRU) inventory interface
• server hard reset generation
• server power fault indication
• Intelligent Chassis Management Bus (ICMB) bridge device
• EMP connection
• LCD interface
Board Management Controller (BMC)
Where located: on the PHP I/O baseboard
What it provides:
• temperature and voltage monitoring of the I/O and CPU baseboards
• threshold comparison functions
• SMI (systems management interrupt) generation
• watchdog timer and certain GPIO (general purpose input/output) functions
• fault-resilient booting
• processor presence, Voltage ID (VID), IERR, and thermal trip monitoring
• server event log, event time stamping, sensor data record information, and DIMM ID
information interface
• current event status and sensor readings when polled by System Management Software
Hot-swap Controller (HSC)
Where located: on the disk backplane
What it does:
• implements the SAF-TE command set
• controls the fault lights and drive power-on
• provides a path for management information via SCSI
• retrieves drive fault status, backplane temperature, and fan failure information via the IPMB
• queries the status of the front panel controller for power supply information
• controls drive power-on and power-down, facilitating hot-swapping