Appendix C. System Status Led Operating States And Definition; Table 2. System Status Led State Definitions - Intel M20MYP1UR Integration And Service Manual

Intel® Server System M20MYP1UR System Integration and Service Guide
Appendix C. System Status LED Operating States and
The system status LED shows the current health of the server system. The system provides two locations for
this feature; one is located on the front control panel and the other is located on the back edge of the server
board, viewable from the back of the system.
The Status LED on the front panel is an amber colored LED that is normally off when the system is operating
in a normal state, and is turned on or blinking when the integrated BMC determines that the system is
approaching a fatal state or has encountered a fatal error that has caused the system to halt.
The Status LED located on the back of the system is a bi-color Green and Amber LED with enhanced system
state status indication over that of the front panel. In addition to matching the critical system errors as those
supported by the front LED in blinking and solid on Amber, this LED also will indicate whether the system is
operating in a normal state (always on Green) or a degraded but operational state (Blinking Green).
When the server is powered down (transitions to the DC-off state or S5), the BMC is still on standby power
and retains the sensor and front panel status LED state established before the power-down event.
When AC power is first applied to the system, the rear and front status LEDs turns solid amber and then
immediately the rear status LED changes to blinking green to indicate that the BMC is booting. If the BMC
boot process completes with no errors, the rear status LED changes to solid green.
System State
• No AC power / Stand-by power present
System is not
• System is in S5 soft-off state.
operating.
• System is running (in S0 State) and its status is healthy. The system is not
System is
operating
• After a BMC reset, and in conjunction with the chassis ID solid on, the
normally.
• Fan redundancy loss. Applies only if the associated platform subsystem
• Fan warning or failure when the number of fully operational fans is less
• Non-critical threshold crossed – Temperature (including HSBP temp),
• Unable to use all of the installed memory (more than 1 DIMM installed).
• Correctable Errors over a threshold and migrating to a spare DIMM
System is
operating in a
non-critical
• In mirrored configuration, when memory mirroring takes place and
degraded state.
• Battery failure.
• BMC executing in uBoot. (Indicated by Chassis ID blinking at 3Hz). System
• BMC Watchdog has reset the BMC.
• Power Unit sensor offset for configuration error is asserted.
• HDD HSC is off-line or degraded.
72

Table 2. System status LED state definitions

BIOS Status Description
exhibiting any errors. AC power is present, and BMC has booted, and
manageability functionality is up and running.
BMC is booting Linux*. Control has been passed from BMC uBoot to BMC
Linux* itself. It is in this state for roughly 10-20 seconds.
has redundancy capabilities.
than the minimum number needed to cool the system.
voltage, input power to power supply, output current for main power rail
from power supply and Processor Thermal Control (Therm Ctrl) sensors.
(memory sparing). This indicates that the system no longer has spared
DIMMs (a redundancy lost condition). Corresponding DIMM LED lit.
system loses memory redundancy.
in degraded state (no manageability). BMC uBoot is running but has not
transferred control to BMC Linux*. Server will be in this state 6-8 seconds
after BMC reset while it pulls the Linux* image into flash.
Definition
Front Rear
Status Status
LED State LED State
Off Off
Solid
Off
green
Blinking
Off
green