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Intel® Server Board S2600IP and Intel® Workstation Board W2600CR TPSPlatform Management Overview
Revision 1.1
53
Intel order number G34153-003
Code
Reason for Beep
Associated Sensors
1-5-1-4
The system does not power on or
unexpectedly powers off and a power
supply unit (PSU) is present that is an
incompatible model with one or more
other PSUs in the system
PS Status
4.2.6
Diagnostic Interrupt (NMI) Button
The BMC generates an NMI pulse under certain conditions. The BMC-generated NMI pulse
duration is at least 30 ms. Once an NMI has been generated by the BMC, the BMC does not
generate another NMI until the system has been reset or powered down.
The following actions cause the BMC to generate an NMI pulse:
1. Receiving a
Chassis Control
command to pulse the diagnostic interrupt. This command
does not cause an event to be logged in the SEL.
2. Watchdog timer pre-timeout expiration with NMI/diagnostic interrupt pre-timeout action
enabled.
The following table shows the behavior regarding NMI signal generation and event logging
by the BMC.
Table 13. NMI Signal Generation and Event Logging
Causal Event
NMI
Signal Generation
Front Panel Diag Interrupt Sensor Event
Logging Support
Chassis Control command (pulse diagnostic
interrupt)
X
–
Front panel diagnostic interrupt button pressed
X
X
Watchdog Timer pre-timeout expiration with
NMI/diagnostic interrupt action
X
X
4.2.7
BMC Watchdog
The BMC FW is increasingly called upon to perform system functions that are time-critical in
that failure to provide these functions in a timely manner can result in system or component
damage. Intel
®
S1400/S1600/S2400/S2600 Server Platforms introduce a BMC watchdog
feature to provide a safe-guard against this scenario by providing an automatic recovery
mechanism. It also can provide automatic recovery of functionality that has failed due to a fatal
FW defect triggered by a rare sequence of events or a BMC hang due to some type of HW
glitch (for example, power).
This feature is comprised of a set of capabilities whose purpose is to detect misbehaving
subsections of BMC firmware, the BMC CPU itself, or HW subsystems of the BMC component,
and to take appropriate action to restore proper operation. The action taken is dependent on the
nature of the detected failure and may result in a restart of the BMC CPU, one or more BMC
HW subsystems, or a restart of malfunctioning FW subsystems.
The BMC watchdog feature will only allow up to three resets of the BMC CPU (such as HW
reset) or entire FW stack (such as a SW reset) before giving up and remaining in the uBOOT
code. This count is cleared upon cycling of power to the BMC or upon continuous operation of
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