Troubleshooting Power Supply Issues on the T5xx0 (Netra included) platform

Asset ID:	1-72-1561282.1
Update Date:	2017-04-26
Keywords:

Solution Type Problem Resolution Sure

Solution 1561282.1 : Troubleshooting Power Supply Issues on the T5xx0 (Netra included) platform

Applies to:

Sun Netra T5440 Server - Version All Versions to All Versions [Release All Releases]
Sun SPARC Enterprise T5220 Server - Version All Versions to All Versions [Release All Releases]
Sun SPARC Enterprise T5120 Server - Version All Versions to All Versions [Release All Releases]
Sun SPARC Enterprise T5140 Server - Version All Versions to All Versions [Release All Releases]
Sun SPARC Enterprise T5440 Server - Version All Versions to All Versions [Release All Releases]
Oracle Solaris on SPARC (64-bit)
Oracle Solaris on SPARC (32-bit)
Creation of this document is from a T5440.

Symptoms

Customer reports a power supply issue.

Checking the environmentals using the following commands showenvironment (ALOM) or show -d properties -level all /SYS/<PS#> (ILOM), in the section of the power supplies you can see a failed power supply:

--------------------------------------------------------------------------------
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
/SYS/PS2 FAILED OFF       OFF        ON         OFF
/SYS/PS3 OK     OFF       OFF        OFF        OFF

There's also an amber LED active for a power supply fault, also from showenvironment:

--------------------------------------------------------------------------------
System Indicator Status:
--------------------------------------------------------------------------------
/SYS/LOCATE /SYS/SERVICE /SYS/ACT
OFF ON ON
--------------------------------------------------------------------------------
/SYS/PS_FAULT /SYS/TEMP_FAULT /SYS/FAN_FAULT
ON OFF OFF

Occasionally, you may also find entries in /var/adm/messages file with following:

Apr 19 06:09:30 <host> SC Alert: [ID 325448 daemon.alert] IPMI | critical: ID = d : 04/19/2012 : 12:48:26 : Voltage : /PS2/AC_POK : State Deasserted
Apr 19 06:09:30 <host> SC Alert: [ID 769395 daemon.alert] IPMI | critical: ID = e : 04/19/2012 : 12:48:27 : Power Supply : /PS2/FAIL : State Asserted

and if needed the status can also be checked from the sp (ilom shell):

-> show -d properties -level all /SYS/<PS#>, where X is the suspect power supply
-> show faulty
-> show /SP/logs/event/list

Changes

If Power Circuit or Power Cord is interrupted from the source to the server, System Admins may generate Service Requests for investigation.

Cause

In the above example, the fault is in power supply /SYS/PS2.

The reason is a failure in the voltage sensors, as seen in prtdiag -v:

Voltage indicators:
------------------------------------------------------------
Location Indicator Condition
------------------------------------------------------------
SYS/MB/SP V_+3VBATT ok
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
SYS/PS2   AC_POK     ok
SYS/PS2   DC_POK     fail
SYS/PS2   VOLT_FAULT fail
SYS/PS3   AC_POK     ok
SYS/PS3   DC_POK     ok
SYS/PS3   VOLT_FAULT ok

Sometimes (but not always) you will also see events in the messages file, showing a fault:

Jun 10 00:00:08 <host> SC Alert: [ID 435534 daemon.notice] Chassis | minor: POK Glitch: /SYS/PS2

Sometimes input power problems are related to an interruption of a server's input power possibly due to a popped breaker or loose power cord. Example messages shown:

Apr 19 06:09:42 <host> SC Alert: [ID 209813 daemon.alert] Fault | critical: SP detected fault at time Thu Apr 19 12:48:46 2012. Input power unavailable for PSU at PS2
Apr 19 06:09:43 <host> SC Alert: [ID 665882 daemon.alert] Fault | critical: SP detected fault at time Thu Apr 19 12:48:48 2012. Generic Powersupply fault at PS2 asserted

Solution

The solution to the above is thus:

1) Check the cables and power outlets and make sure they are working properly.

2) Reseat the power supply

3) If the above don't resolve the issue, open a service request with Oracle Support and collect the following data: explorer output + ilom snapshot

and check also below docs:

T5120/T5220/T5140/T5240 and Netras - System may not power on or report many errors on both power supplies (Doc ID 1642386.1)
Power Supplies in SPARC Enterprise T5120/T5140 systems are shown in the wrong PSU Slots (CR:7020694 (15697948) (Doc ID 1309810.1)

T5120 Server Unexpectedly Powers Off Due To Complete Power Loss (Doc ID 1626403.1)

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