Sun SPARC Enterprise[TM] M4000/M5000 - Multiple PSU & IOU errors (SCF-8004-LD, SCF-8004-KH, SCF-8004-G4) logged very close together in showlogs - IOU replacement does not resolve the issue

Asset ID:	1-72-1669135.1
Update Date:	2017-05-09
Keywords:

Solution Type Problem Resolution Sure

Solution 1669135.1 : Sun SPARC Enterprise[TM] M4000/M5000 - Multiple PSU & IOU errors (SCF-8004-LD, SCF-8004-KH, SCF-8004-G4) logged very close together in showlogs - IOU replacement does not resolve the issue

Applies to:

Sun SPARC Enterprise M4000 Server - Version All Versions to All Versions [Release All Releases]
Sun SPARC Enterprise M5000 Server - Version All Versions to All Versions [Release All Releases]
Information in this document applies to any platform.

Symptoms

You will see the following for one or more PSU's

Date: Apr 28 05:47:58 UTC 2014     Code: 80002000-c3ff0000-0104370000000000
    Status: Alarm                  Occurred: Apr 28 05:47:57.751 UTC 2014
    FRU: /PSU#0
    Msg: Unit disappeared unexpectedly
    Diagnostic Code:
        00000000 00000000 00000000
        00000000 00000000 00000000 00000000
        00000000 00000000 00000000 00000000
    UUID: da4a94a3-7355-4e03-a85e-ff8a7380ec24 MSG-ID: SCF-8004-LD

Date: Apr 28 05:48:20 UTC 2014     Code: 80002000-c3ff0000-0104080000000000
    Status: Alarm                  Occurred: Apr 28 05:48:20.389 UTC 2014
    FRU: /PSU#0
    Msg: Unit detected unexpectedly
    Diagnostic Code:
        00000000 00000000 00000000
        00000000 00000000 00000000 00000000
        00000000 00000000 00000000 00000000
    UUID: 6ab78664-0e98-4f55-a830-5bbd7296f1f5 MSG-ID: SCF-8004-KH

The above errors will be accompanied by something similar to the following:

Date: Apr 28 05:54:50 UTC 2014     Code: 80002000-bcffb301-0167320600000000
    Status: Alarm                  Occurred: Apr 28 05:54:48.330 UTC 2014
    FRU: /IOU#1/DDC_A#0,/IOU#1
    Msg: Power subsystem failure(detector=0)
    Diagnostic Code:
        01000000 00000100 00000000
        00000000 00000003 00000001 000004b0
        00000000 00000000 00000000 00000000
    UUID: 685de3d8-11a5-4b9f-b581-f38d8425170a MSG-ID: SCF-8004-G4
Date: Apr 28 05:55:00 UTC 2014     Code: 80006000-beffb301-0167320700000000
    Status: Alarm                  Occurred: Apr 28 05:54:56.476 UTC 2014
    FRU: /IOU#1/DDCR/DDC_B#0,/IOU#1
    Msg: Power subsystem failure(detector=0)
    Diagnostic Code:
        01000000 00000100 00000000
        00000000 00000003 00000002 00000d48
        00000000 00000000 00000000 00000000
    UUID: c63dff99-fc93-493b-b74e-6303afc0768b MSG-ID: SCF-8004-G4

While we see these errors regularly in more straightforward examples of hardware issues, the key here is that the PSU & IOU errors occur in very close proximity to one another making it likely that they are related to the same underlying issue.

Cause

We need to identify a component that could impact both the PSU's and the IOU's in a fashion undetected by FMA (FMA for each error above points to the FRU identified in showlogs output)

Solution

Replace the Power/IO backplane.

M4000 - 541-0891/7047315

M5000 - 541-0493/7047358

References

<NOTE:1003993.1> - Sun SPARC Enterprise[TM] M3000/M4000/M5000/M8000/M9000: Field Replaceable Unit (FRU) and Customer Replaceable Unit (CRU) Replacement Methods

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