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SAS Expander has set the Chassis LED ON remains after PSU replacement even if reboot BMC

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Category:
ontap-9
Specialty:
hw
Last Updated:

Applies to

  • ONTAP 9
  • FAS2720
  • Baseboard Management Controller(BMC)

Issue

  • Chassis attention LED remains on after PSU replacement:

get_leds
========
FRU LEDs status
======================
FRU LED ID 1  = BMC Locate LED
FRU LED ID 2  = BMC System LED
FRU LED ID 3  = BMC Controller Attention LED
FRU LED ID 4  = BMC Controller Active LED
...
FRU LED ID 1 is off
FRU LED ID 2 is on. Set by Expander
FRU LED ID 3 is off
FRU LED ID 4 is on

  • PSU looks good after replacement:

/usr/local/bin/environ -show_all
================================
Sensor Name              State          Current    Critical     Warning     Warning    Critical
Reading       Low         Low         High       High
-------------------------------------------------------------------------------------------------
PSU2 Bad                                 FALSE
PSU1 Bad                                 FALSE
PSU2                                      GOOD
PSU1                                      GOOD
PSU2 ON                                     ON
PSU1 ON                                     ON
PSU1 INFO                               FRU_AVAIL
PSU1 INFO                               FRU_AVAIL
PSU1 FRU                                  GOOD
PSU2 FRU                                  GOOD

  • Service event shows both nodes set chassis LED on:

Node             ID  Event Location                      Event Description
---------------- --- ----------------------------------  ----------------------
Node-01           1   Chassis 1                           SAS Expander has set the Chassis LED ON
Node-02           1   Chassis 1                           SAS Expander has set the Chassis LED ON

  • System health subsystem shows no fault:

Subsystem         Health
----------------- ------------------
SAS-connect       ok
Environment       ok
Memory            ok
Service-Processor ok
Switch-Health     ok
CIFS-NDO          ok
Motherboard       ok
IO                ok
MetroCluster      ok
MetroCluster_Node ok
FHM-Switch        ok
FHM-Bridge        ok
SAS-connect_Cluster ok

  • Even if delete the service event then reboot BMC, or manually set the led off,  issue persists, and the service event raised again.

 

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