'VOLTAGE_SENSOR @ MB.BAT.V_BAT has exceeded low warning threshold' in Sun Fire V440 & Sun Netra 440 Servers

Asset ID:	1-72-1508651.1
Update Date:	2018-02-14
Keywords:

Solution Type Problem Resolution Sure

Solution 1508651.1 : 'VOLTAGE_SENSOR @ MB.BAT.V_BAT has exceeded low warning threshold' in Sun Fire V440 & Sun Netra 440 Servers

Applies to:

Sun Fire V440 Server - Version All Versions and later
Sun Netra 440 Server - Version All Versions and later
Sun Fire V240 Server - Version All Versions and later
Oracle Solaris on SPARC (32-bit)
Oracle Solaris on SPARC (64-bit)

Symptoms

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SC displaying error messages about Voltage issues on system Battery.

From ALOM:

sc> showlogs
...
SC Alert: VOLTAGE_SENSOR @ MB.BAT.V_BAT has exceeded low warning threshold.
...

From Solaris:

You can see the same warning in the messages file reported by ALOM's watchdog:

<timestamp> <hostname> rmclomv: [ID 585172 kern.crit] VOLTAGE_SENSOR @ MB.BAT.V_BAT has exceeded low warning threshold

Also, you can see the low voltage level on 'prtdiag -v' output:

System Configuration: Oracle Corporation sun4u Sun Fire V440
System clock frequency: 177 MHZ

...
------------------------------------
Voltage sensors:
-----------------------------------
Location       Sensor        Status
-----------------------------------
MB             V_+1V5        okay
MB             V_VCCTM       okay
MB             V_NET0_1V2D   okay
MB             V_NET1_1V2D   okay
MB             V_NET0_1V2A   okay
MB             V_NET1_1V2A   okay
MB             V_+3V3        okay
MB             V_+3V3STBY    okay
MB/BAT         V_BAT         warning (0.61V)
MB             V_SCSI_CORE   okay
MB             V_+5V         okay
MB             V_+12V        okay
MB             V_-12V        okay
PS0            P_PWR         okay
PS0            FF_POK        okay
PS1            P_PWR         okay
PS1            FF_POK        okay
...

Cause

The 3V Lithium battery located on the Motherboard of Sun Fire V440 and Netra 440 is failing.

Solution

The solution for this issue is to replace the System Battery with the Part Number: 150-2850.

A planned outage is required.

Action Plan Would be:

How to replace a V440/Netra 440 Battery:ATR:790:1 (Doc ID 1315647.1)

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