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IB Switches: HARDWARE FAULT: Voltage non-critical threshold breached Component Name: /SYS/MB/V_2.5V, Threshold Value: 2.3868 (Doc ID 1512581.1)

Last updated on AUGUST 29, 2019

Applies to:

Oracle Exadata Hardware - Version and later
Sun Datacenter InfiniBand Switch 36 - Version Not Applicable to Not Applicable [Release N/A]
Linux x86-64
IB switches reports following alerts when voltages gone below threshold Value.
(this isssue is applicable to the infiniband switches in all versions of the exadata/exalogic)

HARDWARE FAULT: Voltage non-critical threshold breached. Component Name: /SYS/MB/V_2.5V, Threshold Value: 2.3868
HARDWARE FAULT: Voltage non-critical threshold breached. Component Name: /SYS/MB/V_1.8V, Threshold Value: 1.6975

check the frequency of these messages, if these messages are not frequent and it's non-critical threshold breached, probably can be ignored.

Check the ILOM snapshot for mentioned component

type = Voltage
ipmi_name = MB/V_2.5V
class = Threshold Sensor
value = 2.480 Volts
upper_nonrecov_threshold = 2.878 Volts
upper_critical_threshold = 2.679 Volts
upper_noncritical_threshold = 2.586 Volts
lower_noncritical_threshold = 2.387 Volts
lower_critical_threshold = 2.282 Volts
lower_nonrecov_threshold = 2.083 Volts
alarm_status = cleared

check env_test

Starting Voltage test:
Voltage ECB OK
Measured 3.3V Main = 3.27 V
Measured 3.3V Standby = 3.35 V
Measured 12V = 11.97 V
Measured 5V = 5.04 V
Measured VBAT = 3.06 V
Measured 2.5V = 2.54 V
Measured 1.8V = 1.79 V
Measured I4 1.2V = 1.22 V
Voltage test returned OK

if you see these message frequently then collect below commands output from switches

#/var/log/messages file


This document provides an idea when to ignore these alerts and if these messages are very frequent and what data need to be collected.


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