NEC Express5800 series User Manual page 32

log their occurrence in the nonvolatile System Event Log (SEL). The events being monitored
include overtemperature and overvoltage conditions, fan failure, or chassis intrusion. To
enable accurate monitoring, the BMC maintains the nonvolatile Sensor Data Record (SDR),
from which sensor information can be retrieved. The BMC provides an ISA host interface to
SDR sensor information, so that software running on the server can poll and retrieve the
server's current status.
The BMC performs the following:
Monitors server board temperature and voltage
Monitors processor presence and controls Fault Resilient Boot (FRB)
Detects and indicates baseboard fan failure
Manages the SEL interface
Manages the SDR Repository interface
Monitors the SDR/SEL timestamp clock
Monitors the system management watchdog timer
Monitors the periodic SMI timer
Monitors the event receiver
Controls secure mode, including video blanking, diskette write-protect monitoring,
and front panel lock/unlock initiation
Controls Wake On LAN via Magic Packet support.
22 System Overview