POST Fails on 6120/6920/6320 array configuration with "Vcc Differential mode test failed"

Asset ID:	1-72-1020584.1
Update Date:	2012-07-30
Keywords:

Solution Type Problem Resolution Sure

Solution 1020584.1 : POST Fails on 6120/6920/6320 array configuration with "Vcc Differential mode test failed"

Applies to:

Sun Storage 6120 Array - Version Not Applicable and later
Sun Storage 6320 System - Version Not Applicable and later
Sun Storage 6920 System - Version Not Applicable and later
All Platforms
***Checked for relevance on 11-June-2012***

Symptoms

Issue presents Itself with the following symptoms:

Controller has gone to fault-disabled or ready-disabled.
Controller has been replaced.

At this point:

Attach a serial connection to the faulted controller.
Issue "enable uN" to place the controller online, and observe the serial connection.
The POST will fail with the message:

6120-2 Starting POST ..Vcc differential mode test failed. ...... POST end Press C to continue

After manual intervention the controller continues to boot.

Cause

This is an issue with the Power Cooling Unit (PCU).

Solution

Resolution requires replacement of BOTH PCU in the tray with the faulted controller.

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