Recognizing and Troubleshooting Missing or Erroneous Environmental Sensor Status output after a recent System Firmware Upgrade on Sun SPARC Enterprise T5120 Server (Doc ID 1598134.1)

Last updated on SEPTEMBER 26, 2019

Applies to:

Sun SPARC Enterprise T5120 Server - Version All Versions to All Versions [Release All Releases]
Information in this document applies to any platform.

Symptoms

Environmental sensor data missing or erroneous from Sun SPARC Enterprise T5120 Server's ALOM "showenvironment" output and Sensors showing Disabled in OS "prtdiag -v" output.

Example

From Service Processor ALOM:

sc> showenvironment

--------------------------------------------------------------------------------
System Temperatures (Temperatures in Celsius):
--------------------------------------------------------------------------------
Sensor                Status Temp LowHard LowSoft LowWarn HighWarn HighSoft HighHard
--------------------------------------------------------------------------------
/SYS/MB/T_AMB    OK 34 -10 -5 0 50 55 60
/SYS/MB/CMP0/T_TCORE UNKNOWN -- -- -- -- -- -- --      <--- Status "Unknown"
/SYS/MB/CMP0/T_BCORE UNKNOWN -- -- -- -- -- -- --      <--- Status "Unknown"
/SYS/MB/CMP0/BR0/CH0/D0/T_AMB OK 61 -10 -8 -5 95 100 105
/SYS/MB/CMP0/BR0/CH0/D1/T_AMB OK 51 -10 -8 -5 95 100 105
/SYS/MB/CMP0/BR0/CH1/D0/T_AMB OK 61 -10 -8 -5 95 100 105
/SYS/MB/CMP0/BR0/CH1/D1/T_AMB OK 57 -10 -8 -5 95 100 105
/SYS/MB/CMP0/BR1/CH0/D0/T_AMB OK 61 -10 -8 -5 95 100 105
/SYS/MB/CMP0/BR1/CH0/D1/T_AMB OK 59 -10 -8 -5 95 100 105
/SYS/MB/CMP0/BR1/CH1/D0/T_AMB OK 63 -10 -8 -5 95 100 105
/SYS/MB/CMP0/BR1/CH1/D1/T_AMB OK 57 -10 -8 -5 95 100 105
/SYS/MB/CMP0/BR2/CH0/D0/T_AMB OK 63 -10 -8 -5 95 100 105
/SYS/MB/CMP0/BR2/CH0/D1/T_AMB OK 61 -10 -8 -5 95 100 105
/SYS/MB/CMP0/BR2/CH1/D0/T_AMB OK 66 -10 -8 -5 95 100 105
/SYS/MB/CMP0/BR2/CH1/D1/T_AMB OK 56 -10 -8 -5 95 100 105
/SYS/MB/CMP0/BR3/CH0/D0/T_AMB OK 64 -10 -8 -5 95 100 105
/SYS/MB/CMP0/BR3/CH0/D1/T_AMB OK 57 -10 -8 -5 95 100 105
/SYS/MB/CMP0/BR3/CH1/D0/T_AMB OK 67 -10 -8 -5 95 100 105
/SYS/MB/CMP0/BR3/CH1/D1/T_AMB OK 53 -10 -8 -5 95 100 105
.
.
.
--------------------------------------------------------------------------------
Voltage sensors (in Volts):
--------------------------------------------------------------------------------
Sensor Status Voltage LowSoft LowWarn HighWarn HighSoft
--------------------------------------------------------------------------------
/SYS/MB/V_+3V3_MAIN OK 3.34 3.06 3.10 3.49 3.53
/SYS/MB/V_+12V0_MAIN OK 12.22 10.90 11.15 12.85 13.10
/SYS/MB/V_VDDIO OK 1.12 1.00 1.02 1.18 1.20
                                                                                               <--- Short List, missing 5 other values
--------------------------------------------------------------------------------
Power Supplies:
--------------------------------------------------------------------------------
Supply Status Fan_Fault Temp_Fault Volt_Fault Cur_Fault
--------------------------------------------------------------------------------
/SYS/PS0 OK OFF OFF OFF OFF
/SYS/PS1 OK OFF OFF OFF OFF

From Operating System:

$ prtdiag -v

System Configuration: Sun Microsystems sun4v SPARC Enterprise T5120

<snip>

Temperature sensors:
------------------------------------------------------------
Location Sensor Status
------------------------------------------------------------
SYS/MB T_AMB ok
SYS/MB/CMP0/BR0/CH0/D0 T_AMB ok
SYS/MB/CMP0/BR0/CH0/D1 T_AMB ok
SYS/MB/CMP0/BR0/CH1/D0 T_AMB ok
SYS/MB/CMP0/BR0/CH1/D1 T_AMB ok
SYS/MB/CMP0/BR1/CH0/D0 T_AMB ok
SYS/MB/CMP0/BR1/CH0/D1 T_AMB ok
SYS/MB/CMP0/BR1/CH1/D0 T_AMB ok
SYS/MB/CMP0/BR1/CH1/D1 T_AMB ok
SYS/MB/CMP0/BR2/CH0/D0 T_AMB ok
SYS/MB/CMP0/BR2/CH0/D1 T_AMB ok
SYS/MB/CMP0/BR2/CH1/D0 T_AMB ok
SYS/MB/CMP0/BR2/CH1/D1 T_AMB ok
SYS/MB/CMP0/BR3/CH0/D0 T_AMB ok
SYS/MB/CMP0/BR3/CH0/D1 T_AMB ok
SYS/MB/CMP0/BR3/CH1/D0 T_AMB ok
SYS/MB/CMP0/BR3/CH1/D1 T_AMB ok
SYS/MB/CMP0 T_TCORE disabled
SYS/MB/CMP0 T_BCORE disabled
.
.
.
Voltage sensors:
------------------------------------------------------------
Location Sensor Status
------------------------------------------------------------
SYS/MB V_VMEML disabled
SYS/MB V_VMEMR disabled
SYS/MB V_+3V3_STBY disabled
SYS/MB V_VCORE disabled
SYS/MB V_+3V3_MAIN ok
SYS/MB V_VDDIO ok
SYS/MB V_+12V0_MAIN ok
SYS/MB V_VBAT disabled
SYS/PS0 V_IN_MAIN ok
SYS/PS0 V_OUT_MAIN ok
SYS/PS1 V_IN_MAIN ok
SYS/PS1 V_OUT_MAIN ok

Voltage indicators:
------------------------------------------------------------
Location Indicator Condition
------------------------------------------------------------
SYS/MB VCORE_POK disabled
SYS/MB VMEML_POK disabled
SYS/MB VMEMR_POK disabled
SYS/PS0 AC_POK ok
SYS/PS0 DC_POK ok
SYS/PS0 VOLT_FAULT ok
SYS/PS1 AC_POK ok
SYS/PS1 DC_POK ok
SYS/PS1 VOLT_FAULT ok

Changes

A recent recommended system firmware update was done by the user.

Cause

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Recognizing and Troubleshooting Missing or Erroneous Environmental Sensor Status output after a recent System Firmware Upgrade on Sun SPARC Enterprise T5120 Server (Doc ID 1598134.1)

Applies to:

Symptoms

Changes

Cause

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