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BMC 16.8 upgrade may result in PSU3 and PSU4 faults

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aff-series
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hw
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Applies to

  • AFF A900/FAS9500
  • ONTAP 9
  • BMC firmware 16.8

Issue

  • After upgrading an AFF A900 or FAS9500 to BMC firmware 16.8, some systems may report a failure of PSU3 and PSU4
    • Example
          EMS log:
       
      Wed Apr 15 14:24:25 -0700 [rno2-cdot33-05: env_mgr: monitor.chassisPowerSupply.degraded:notice]: Chassis power supply 3 is degraded: PSU3 AC In Volt is Unreadable
Wed Apr 15 14:24:26 -0700 [rno2-cdot33-05: env_mgr: monitor.chassisPowerSupply.degraded:notice]: Chassis power supply 3 is degraded: PSU3 AC In Curr is Unreadable
Wed Apr 15 14:24:26 -0700 [rno2-cdot33-05: env_mgr: monitor.chassisPowerSupply.degraded:notice]: Chassis power supply 3 is degraded: PSU3 12V Out Volt is Unreadable
Wed Apr 15 14:24:26 -0700 [rno2-cdot33-05: env_mgr: monitor.chassisPowerSupply.degraded:notice]: Chassis power supply 3 is degraded: PSU3 12V Out Curr is Unreadable
      Wed Apr 15 22:03:35 -0700 [rno2-cdot33-06: env_mgr: monitor.chassisPowerSupply.degraded:notice]: Chassis power supply 4 is degraded: PSU4 AC In Volt is Unreadable
Wed Apr 15 22:03:35 -0700 [rno2-cdot33-06: env_mgr: monitor.chassisPowerSupply.degraded:notice]: Chassis power supply 4 is degraded: PSU4 AC In Curr is Unreadable
Wed Apr 15 22:03:35 -0700 [rno2-cdot33-06: env_mgr: monitor.chassisPowerSupply.degraded:notice]: Chassis power supply 4 is degraded: PSU4 12V Out Volt is Unreadable
Wed Apr 15 22:03:35 -0700 [rno2-cdot33-06: env_mgr: monitor.chassisPowerSupply.degraded:notice]: Chassis power supply 4 is degraded: PSU4 12V Out Curr is Unreadable

      SP-Latest-IPMI section in Autosupport (Specific affected sensors below. Output is the same for partner PSU4)

      PSU3_Status      | 0x0          | discrete   | AC OK      | na        | na        | na        | na        
PSU3_12V_OP_I    |  na          | Amps       | na         | 0.000     | 0.000     | 140.000   | 144.000   
PSU3_12V_OP_V    |  na          | Volts      | na         | 10.980    | 11.400    | 12.900    | 13.500    
PSU3_AC_IP_I     |  na          | Amps       | na         | na        | na        | 14.000    | 14.980    
PSU3_AC_IP_V     |  na          | Volts      | na         | 88.000    | 90.000    | 255.000   | 255.000   
PSU3_Fault       |  na          | discrete   | na         | na        | na        | na        | na

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