Asset ID:	1-71-1512581.1
Update Date:	2018-01-03
Keywords:

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Solution Type  Technical Instruction Sure

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

In this Document

Goal

Solution

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Created from <SR 3-6481942566>

Applies to:

Oracle Exadata Hardware - Version 11.1.0.6 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

/SYS/MB/V_2.5V
Properties:
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

#showunhealthy
#checkpower
#env_test
#/var/log/messages file

Goal

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

Solution

The message can be ignored, as long as these do not not occur with a high frequency

if alarm_status = cleared and if env_test returns Voltage test returned OK then the message can be ignored

if you see these message frequently then replace the respective components.

 

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