Purpose

This document addresses the identification of failed power supply  in T3,T3+ and 6120 storage arrays, via the symptoms provided.

Symptoms:

• Storade reports an alarm in Browser or email
• Performance degraded,
• PCU fault LED lit
• Global fault LED lit.
• Messages in logs indicating PCU failure.

Please validate that each troubleshooting step below is true for your environment. 
Each step will provide instructions via a link to a document, for validating the 
step and taking corrective action as necessary. The steps are ordered in the most 
appropriate sequence to isolate the issue and identify the proper resolution. 
Please do not skip a step.

Last Review Date

Instructions for the Reader

Troubleshooting Details

1)Inspect the array PCU LEDs visually to see if any fault exists. 

• If the array is remote or you still feel there is a problem with the PCU, then proceed to Step 2.

• Otherwise, the following table explains the LED status and corrective actions(indicated by *) for fault conditions:

• Power is off • No AC Input
* Action:  Check the power source

Amber 

Off

• Power is off • Power switch turned off • AC power is available
* Action:  Check if the PCU switch set to ON position.

Green 

Off

Array is shutdown:
• PCU disabled • AC power is available
* Action:  Go to Step 2.

Green 

Green

Normal operating state:
• PCU receiving AC power
• Power switch is turned on
• AC power is available
* Action:  No Action required.  If you would like to investigate further, go to Step 2.

Amber 

Amber

• Power switch is turned off
• Array will power down after PCU is disabled
* Action:  Check power source and power switch position

Green 

Amber

Indicates one or more of the following:
• Over temperature condition; PCU is disabled
• DC power not available; PCU disabled
• Both fans have faults; PCU disabled
• Battery is being tested
* Action:  Proceed to step 2

Green 

Blinking Green

• Battery is charging
* Action:  Refer to <Document: 1002468.1> Verify Battery for battery diagnostics 

Green 

Blinking Amber

Indicates one or more of the following:
• PCU is disabled
• single fan fault
• Battery low; PCU remains enabled
• Battery failure; PCU enabled
* Action:  Proceed to step 2

2)Validate that you can telnet and log into your array.

Reference document:  <Document: 1012660.1> Troubleshooting Sun StorEdge[TM] T3, T3+ and 6120 Access Problems
If you log into the array successfully, continue to Step 3.

3)At the prompt run fru stat pcu and examine the output. 

Example:
t3:/:<7>fru stat pcu
POWER   STATUS   STATE       SOURCE  OUTPUT  BATTERY  TEMP    FAN1    FAN2
------  -------  ---------   ------  ------  -------  ------  ------  ------
u1pcu1  ready    enabled     line    normal  normal   normal  normal  normal
u1pcu2  ready    enabled     line    normal  normal   normal  normal  normal
u2pcu1  ready    enabled     line    normal  normal   normal  normal  normal
u2pcu2  ready    enabled     line    normal  failed   normal  normal  normal

• If status/state is ready-enabled and battery status is normal PCU is optimal. No further action is required.

• If status/state is ready-disabled, check power cable, switch, and AC output. 

• If status is ready-enabled,and the battery is failed,then there may be a problem with the battery.  Reference <Document: 1002468.1> Troubleshooting Sun StorEdge T3/6120 Battery Faults.

• If status is fault-enabled output=fault, go to Step 4. 
  

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