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Node reports CriticalPSUFruOffAlert in system health alerts due to failed PSU

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Applies to

  • ONTAP 9
  • FAS/AFF Systems

Issue

  • Node reports CriticalPSUFruOffAlert in health alerts:
ClusterA::> system health alert show -instance
                      Node: Node-01
                   Monitor: chassis
                  Alert ID: CriticalPSUFruOffAlert
         Alerting Resource: xxxxxxx
                 Subsystem: Environment
           Indication Time: Fri May 20 02:08:21 2022
                  Severity: Critical
            Probable Cause: Loss_of_redundancy
               Description: PSU1 is off. The nodes in this chassis are Node-01, Node-02.
        Corrective Actions: 1. Check PSU1 and switch it on.
                            2. Refer to the Hardware specification guide for more information on the position of the                                power supply unit (PSU) and ways to check or replace it.
                            3. Contact support personnel if the alert persists.
  • The following events are reported in the event logs:

[Node-01: env_mgr: monitor.chassisPowerSupply.off:notice]: Chassis power supply 1 off.
[Node-01: env_mgr: monitor.chassisPowerSupply.degraded:notice]: Chassis power supply 1 is degraded: PSU1 Temperature is Unreadable
[Node-01: env_mgr: monitor.chassisPowerSupply.degraded:notice]: Chassis power supply 1 is degraded: PSU1 Current is Unreadable
[Node-01: env_mgr: monitor.chassisPowerSupply.degraded:notice]: Chassis power supply 1 is degraded: PSU1 Fan1 Speed is Unreadable
[Node-01: env_mgr: monitor.chassisPowerSupply.degraded:notice]: Chassis power supply 1 is degraded: PSU1 Fan1 Fault is Unreadable
[Node-01: env_mgr: monitor.chassisPowerSupply.degraded:notice]: Chassis power supply 1 is degraded: PSU1 Fan2 Speed is Unreadable
[Node-01: env_mgr: monitor.chassisPowerSupply.degraded:notice]: Chassis power supply 1 is degraded: PSU1 Fan2 Fault is Unreadable
[Node-01: env_mgr: monitor.chassisPowerSupply.degraded:notice]: Chassis power supply 1 is degraded: PSU1 Pwr Out OK is Unreadable
[Node-01: env_mgr: monitor.chassisPowerSupply.degraded:notice]: Chassis power supply 1 is degraded: PSU1 Fault is Unreadable
[Node-01: env_mgr: monitor.chassisPowerSupply.degraded:notice]: Chassis power supply 1 is degraded: PSU1 Over Temp is Unreadable
[Node-01: env_mgr: monitor.chassisPowerSupply.degraded:notice]: Chassis power supply 1 is degraded: PSU1 Over Volt is Unreadable
[Node-01: env_mgr: monitor.chassisPowerSupply.degraded:notice]: Chassis power supply 1 is degraded: PSU1 Over Curr is Unreadable

[Node-01: power_low_monitor: monitor.chassisPower.degraded:alert]: Chassis power is degraded: Power Supply Status Critical: PSU1.
[Node-01: power_low_monitor: callhome.chassis.power:error]: Call home for CHASSIS POWER DEGRADED: Power Supply Status Critical: PSU1.

  • SP reports the PSU sensors as na in system sensors output:

SP Node-01> system sensors

Sensor Name      | Current    | Unit       | Status     | LCR       | LNC       | UNC       | UCR
-----------------+------------+------------+------------+-----------+-----------+-----------+-----------
PSU1_Present     | 0x0        | discrete   | Present    | na        | na        | na        | na        
PSU1_Temp        | na         | degrees C  | na         | 0.000     | 5.000     | 50.000    | 60.000    
PSU1_Curr        | na         | Amps       | na         | na        | na        | na        | na        
PSU1_Fan1_Speed  | na         | RPM        | na         | 4500.000  | 4600.000  | na        | na        
PSU1_Fan1_Fault  | na         | discrete   | na         | na        | na        | na        | na        
PSU1_Fan2_Speed  | na         | RPM        | na         | 4500.000  | 4600.000  | na        | na        
PSU1_Fan2_Fault  | na         | discrete   | na         | na        | na        | na        | na        
PSU1_Status_OK   | na         | discrete   | na         | na        | na        | na        | na        
PSU1_Pwr_In_OK   | 0x0        | discrete   | Deasserted | na        | na        | na        | na        
PSU1_Pwr_Out_OK  | na         | discrete   | na         | na        | na        | na        | na        
PSU1_Fault       | na         | discrete   | na         | na        | na        | na        | na        
PSU1_Input_Type  | na         | discrete   | na         | na        | na        | na        | na        
PSU1_Over_Temp   | na         | discrete   | na         | na        | na        | na        | na        
PSU1_Over_Volt   | na         | discrete   | na         | na        | na        | na        | na        
PSU1_Over_Curr   | na         | discrete   | na         | na        | na        | na        | na       

  • The issue persists even after reseating the affected PSU.

 

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