Server Management Summary
The server board’s server management architecture features a board management controller (BMC), which autonomously monitors server status and provides the interface to server management control functions. The BMC is responsible for controlling system power, resets, monitoring voltages, temperatures, fans, and communicating with secondary controllers on its Intelligent Platform Management Bus (IPMB).
The functions of each controller are summarized in the following sections.
Server Board Management Controller
The BMC on the server board provides server management monitoring capabilities. Associated with the BMC is a flash memory that holds the operational code, sensor data records (SDR), and system event log (SEL). A serial EEPROM holds the BMC configuration defaults and field replaceable unit (FRU) information. The BMC supports the following:
•Server board voltage monitoring
•Fan failure detection
•Fan speed control
•Processor voltage monitoring
•Processor presence detection
•Processor internal error (IERR) monitoring
•Fault resilient booting (FRB)
•Processor disable control
•Watchdog timer
•Periodic system management interrupt (SMI) timer
•I2C master controller for the Intelligent Platform Management Bus (IPMB)
•Three private I2C management bus interfaces
•Server management software (SMS) and server management mode (SMM) IPMB message receiver
•Event message receiver
•System event log (SEL) management and access
•Sensor data record (SDR) repository management and access
•Processor nonmaskable interrupt (NMI) monitoring
•Processor SMI monitoring
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•Secure mode, video blank, and floppy write protect
•Software front panel NMI generation
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