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CHW-268: False-positive reports of aged NVMEM battery causes ONTAP to shutdown

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ontap-9
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HW
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Issue

  • On some storage systems, the nonvolatile memory (NVMEM) battery's gauge prematurely reports a low capacity that causes sensor readings that drop below threshold values, which in turn, may cause ONTAP to shut down.


  • The following models are potentially affected:
    • AFF A220, AFF A150, AFF C190, ASA A150, FAS2750, FAS2720


  • EMS log shows the following events:
  Jul 24 09:33:10 [node1:nvmem.battery.fccLowCrit:EMERGENCY]: The NVMEM battery full-charge capacity is critically low (32 ). To prevent data loss, the system will shut down in 20 minutes.
  Jul 24 09:33:40 [node1:callhome.battery.failure:EMERGENCY]: Call home for BATTERY (full charge capacity low) CRITICAL.

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