Sun SPARC[TM] Enterprise M4000/M5000 - MBU_B and MEMB Faulted with SCF-8004-EC and SCF-8002-K2

(Doc ID 2410956.1)

Last updated on JUNE 18, 2018

Applies to:

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

Symptoms

Date: Apr 25 18:55:03 EDT 2018 Code: 60006000-98020000-0106400d00000000
  Status: Warning Occurred: Apr 25 18:55:01.753 EDT 2018
  FRU: /MBU_B
  Msg: Abnormal reaction of LSI (compare)
  Diagnostic Code:
     00000000 00000000 00000000
     05002000 12040003 ffffff9d fffffffc
     00000000 00000000 00000000 00000000
  UUID: 8ded1403-59bc-486d-b570-164e4165fc57 MSG-ID: SCF-8002-K2

 

Apr 25 18:55:03.0287 d16cd0b1-ff3e-4f58-81ae-964bc982b761 SCF-8004-EC
Apr 25 18:55:03.0287 ereport.chassis.power.uvf
class = fault.chassis.power.undervoltage
certainty = 100%
hc-list(s) ==> component=/MBU_B/MEMB#5
hc-list(s) ==> chassis=0 mbu=0 memb=5
scf-resource = hc:///chassis=0/mbu=0/memb=5
scf-fru = hc://:product-id=SPARC Enterprise M5000:chassis-id=BDF1124E48:server-id=xxxxxxxxx-con:serial=BFxxxxxxxxx:part=CF00541-0545 09 \541-0545-09:revision=0101/component=/MBU_B/MEMB#5
detected-by = SCF
location = /MBU_B/MEMB#5

 

MBU's and MEMBs are faulted and other components deconfigured.

* MBU_B Status:Faulted;
* CPUM#0-CHIP#0 Status:Deconfigured;
..... snip ......
* MEMB#0 Status:Faulted;
* MEM#0A Status:Deconfigured;
* MEM#0B Status:Deconfigured;
* MEM#1A Status:Deconfigured;
* MEM#1B Status:Deconfigured;
* MEM#2A Status:Deconfigured;
* MEM#2B Status:Deconfigured;
* MEM#3A Status:Deconfigured;
* MEM#3B Status:Deconfigured;
* MEMB#1 Status:Faulted;
....snip....
* MEMB#4 Status:Faulted;
..... snip ......
* MEMB#5 Status:Faulted;
..... snip ......
* DDC_A#0 Status:Deconfigured;
* DDC_A#1 Status:Deconfigured;
* DDC_A#2 Status:Deconfigured;
* DDC_A#3 Status:Deconfigured;
* DDC_B#0 Status:Deconfigured;
* DDC_B#1 Status:Deconfigured;
* IOU#0 Status:Deconfigured;
* DDC_A#0 Status:Deconfigured;
* DDCR Status:Deconfigured;
* DDC_B#0 Status:Deconfigured;
* IOU#1 Status:Deconfigured;
* DDC_A#0 Status:Deconfigured;
* DDCR Status:Deconfigured;
* DDC_B#0 Status:Deconfigured;

Replacing the MBU does not fix the issue.

Showlogs monitor show the following sample errors:
Apr 25 18:54:33 hostname Alarm: /MBU_B/MEMB#4:SCF:Critical low voltage error(detector=187)
Apr 25 18:54:33 hostname Alarm: /MBU_B/MEMB#5:SCF:Critical low voltage error(detector=187)
Apr 25 18:54:33 hostname Warning: /UNSPECIFIED:SCF:failed to read/write active status register
Apr 25 18:54:33 hostname Warning: /UNSPECIFIED:SCF:failed to read/write interrupt mask register
Apr 25 18:54:33 hostname Warning: /UNSPECIFIED:SCF:failed to read/write active status register
Apr 25 18:54:33 hostname Warning: /UNSPECIFIED:SCF:failed to read/write interrupt mask register
Apr 25 18:54:33 hostname Warning: /UNSPECIFIED:SCF:failed to read/write active status register
Apr 25 18:54:33 hostname Warning: /UNSPECIFIED:SCF:failed to read/write interrupt mask register
Apr 25 18:54:34 hostname Warning: /UNSPECIFIED:SCF:failed to read/write active status register
Apr 25 18:54:34 hostname Warning: /UNSPECIFIED:SCF:failed to read/write interrupt mask register
Apr 25 18:54:34 hostname Warning: /UNSPECIFIED:SCF:spurious unit interrupt
Apr 25 18:54:34 hostname last message repeated 5 times
Apr 25 18:54:44 hostname Alarm: /UNSPECIFIED:ANALYZE:LSI detected errors with power subsystem failure
Apr 25 18:54:47 hostname monitor_msg: SCF:DomainID 0 state change (initialize phase started, detail#10)
Apr 25 18:55:10 hostname Warning: /MBU_B:SCF:Abnormal reaction of LSI (compare)
Apr 25 18:55:12 hostname last message repeated 3 times
Apr 25 18:55:14 hostname monitor_msg: SCF:Reset retry
Apr 25 18:55:15 hostname monitor_msg: SCF:System stopped (no available XSB)
Apr 25 18:55:19 hostname monitor_msg: SCF:DomainID 0 state change (Powered off, detail#8)
Apr 25 18:56:15 hostname monitor_msg: SCF:System powered off

Cause

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