About the System Status LED states
The System Status LED is a bi-color (Green/Amber) indicator that shows the current health of the system. The appliance provides two locations for this feature. The first location is on the Front Control Panel, while the second location is on the back edge of the server board.
The following table provides a description of each LED state.
Table: System Status LED states
Color | State | Criticality | Description |
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No color | Off - The system is not operating. | Not ready | System power is off (AC and/or DC) System is in EuP Lot6 Off Mode System is in S5 Soft-Off State
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Green | Solid on (SO) | Healthy | Indicates that the system is running (in S0 State) and its status is "Healthy". The system is not exhibiting any errors. AC power is present and BMC has booted and manageability functionality is up and running. |
Green | ~1 Hz blink | Degraded The system is operating in a degraded state although still functional. or The system is operating in a redundant state but with an impending failure warning. | System degraded: Redundant loss, such as power supply or fan. Applies only if the associated platform sub-system has redundancy capabilities. Fan warning or failure when the number of fully operational fans is more than minimum number needed to cool the system. Non-critical threshold crossed: Temperature (including HSBP temp), voltage, input power to power supply, output current for main power rail from power supply and Processor Thermal Control (Therm Ctrl) sensors. Power supply predictive failure occurred while redundant power supply configuration was present. Unable to use all of the installed memory (one or more DIMMs failed/disabled but functional memory remains available). Battery failure BMC executing in uBoot. (Indicated by Chassis ID blinking at 3Hz). System in degraded state (no manageability). BMC uBoot is running but has not transferred control to the BMC Linux. Server will be in this state 6-8 seconds after BMC reset while it pulls the Linux image into flash.
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Green | ~1 Hz blink | Degraded (continued) | System degraded (continued): BMC booting Linux. (Indicated by Chassis ID solid ON). System in degraded state (no manageability). Control has been passed from BMC uBoot to BMC Linux itself. It will be in this state for 10-20 seconds. BMC Watchdog has reset the BMC. Power unit sensor offset for configuration error is asserted. Hard disk drive HSC is off-line or degraded.
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Amber | ~1 Hz blink | Non-critical The system is operating in a degraded state with an impending failure warning. However, the system is still functioning. | Non-fatal, although the system is likely to fail due to the following issues: Critical threshold crossed - Voltage, temperature (including HSBP temp), input power to power supply, output current for main power rail from power supply and PROCHOT (Therm Ctrl) sensors. VRD Hot asserted Minimum number of fans to cool the system not present or failed Hard drive fault Power Unit Redundancy sensor - Insufficient resources offset (indicates not enough power supplies present) Correctable memory error threshold has been reached for a failing DIMM when the system is operating in a non-redundant mode.
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Amber | Solid on | Critical, non-recoverable - System is halted | Fatal alarm - system has failed or shutdown: CPU CATERR signal asserted MSID mismatch detected (CATERR also asserts for this case) CPU1 is missing CPU Thermal Trip No power - power fault DIMM failure when there is only one DIMM present; no other good DIMM memory present Runtime memory uncorrectable error in non-redundant mode.
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Amber | Solid on | Critical, non-recoverable - System is halted | Uncorrectable Runtime memory error in non-redundant mode DIMM Thermal Trip or equivalent CPU ERR2 signal is asserted BMC/Video memory test failed (Chassis ID shows blue/solid-on for this condition) SBB Thermal Trip or equivalent 240VA fault Both uBoot BMC FW images are bad (Chassis ID shows blue/solid-on for this condition) Fatal Error in processor initialization: Processor family not identical Processor model not identical Processor core/thread counts not identical Processor cache size not identical Unable to synchronize processor frequency Unable to synchronize QPI link frequency
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