Intel® Server Board S2600CW Family TPS
Intel® Server Board S2600CW Platform Management
Revision 2.4
65
the SEL, the last POST code generated during the previous boot attempt is written. FRB2
failure is not reflected in the processor status sensor value.
The FRB2 failure does not affect the front panel LEDs.
5.2.3.3
Post Code Display
The BMC, upon receiving standby power, initializes internal hardware to monitor port 80h
(POST code) writes. Data written to port 80h is output to the system POST LEDs.
The BMC will deactivate POST LEDs after POST completes.
5.2.4
Watchdog Timer
The BMC implements a fully IPMI 2.0 compatible watchdog timer. For details, see the
Intelligent Platform Management Interface Specification Second Generation v2.0
. The
NMI/diagnostic interrupt for an IPMI 2.0 watchdog timer is associated with an NMI. A watchdog
pre-timeout SMI or equivalent signal assertion is not supported.
5.2.5
System Event Log (SEL)
The BMC implements the system event log as specified in the
Intelligent Platform
Management Interface Specification, Version 2.0
. The SEL is accessible regardless of the
system power state through the BMC's in-band and out-of-band interfaces.
The BMC allocates 95,231 bytes (approx. 93 KB) of non-volatile storage space to store system
events. The SEL timestamps may not be in order. Up to 3,639 SEL records can be stored at a
time. Because the SEL is circular, any command that results in an overflow of the SEL beyond
the allocated space will overwrite the oldest entries in the SEL, while setting the overflow flag.
5.3
Sensor Monitoring
The BMC monitors system hardware and reports system health. The information gathered
from physical sensors is translated into IPMI sensors as part of the “IPMI Sensor Model”. The
BMC also reports various system state changes by maintaining virtual sensors that are not
specifically tied to physical hardware. This section describes general aspects of BMC sensor
management as well as describing how specific sensor types are modeled. Unless otherwise
specified, the term “sensor” refers to the IPMI sensor-model definition of a sensor.
5.3.1
Sensor Scanning
The value of many of the BMC’s sensors is derived by the BMC FW periodically polling physical
sensors in the system to read temperature, voltages, and so on. Some of these physical
sensors are built-in to the BMC component itself and some are physically separated from the
BMC. Polling of physical sensors for support of IPMI sensor monitoring does not occur until
the BMC’s operational code is running and the IPMI FW subsystem has completed
initialization. IPMI sensor monitoring is not supported in the BMC boot code. Additionally, the
BMC selectively polls physical sensors based on the current power and reset state of the
