P3.3V BATT is critically low (16 mV) and sensor detecting voltage anomalies leading to repeated shutdowns
Applies to
- FAS8200
- AFF A300
Issue
- ONTAP events alerts for coin cell P3.3V BATT. Example:
May 27 13:40:17 [node2:monitor.chassisPower.degraded:ALERT]: Chassis power is degraded: P3.3V BATT is critical low (16 mV).
May 27 14:12:58 [node2:monitor.chassisPower.degraded:ALERT]: Chassis power is degraded: Sensor detecting voltage anomalies.
- In specific scenarios, the system can experiences a shut down due.
- The
P3V3_BATTsensor voltage value is low.
PVCCP_CPU0 | 1.775 | Volts | ok | 0.010 | 0.019 | 2.454 | 2.464
P3V3_BATT | 0.016 | Volts | cr | 0.016 | 0.032 | 4.048 | 4.064
P12V | 11.842 | Volts | ok | 0.000 | 0.000 | 15.810 | 15.810
- From
SP-LATEST-IPMI, AutoSupport section, the P3.3V voltage is repeatedly fluctuating between Low Non-Critical (LNC) and Low Critical (LCR).
==== SP-LATEST-IPMI(node2) ====
...
tag origin fld fault reason count time
---- ------- ---- ------------- ------ -----
1 0x5 /chassis-1/controller-a/coin-1 Voltage Sensor 29 LCR 1 Fri May 31 09:43:38 2024
2 0x5 /chassis-1/controller-a/coin-1 Voltage Sensor 29 LNC 1 Fri May 31 09:43:26 2024
Fault Lights On:
/chassis-1 2
/chassis-1/controller-a 2
/chassis-1/controller-a/coin-1 2
Sensor Name State Current Critical Warning Warning Critical
Reading Low Low High High
-------------------------------------------------------------------------------------------------
:
P3.3V BATT critlow 16 mV 16 mV 32 mV 4048 mV 4064 mV
- The issue remains after the coin cell battery replacement.