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Alert LED turned ON a Shelf without any other observed fault or DC UNDER VOLTAGE messages

Last Updated:

Applies to

  • DS2246
  • DS4486
  • DS4246
  • DS4243
  • Data ONTAP



  • Disk Shelf reports error message DC UNDER VOLTAGE, the LED is ON without any other indicating LED, or any failure message.
  • Depending on the version of Data ONTAP the system behaviour is different.
Symptom Notes
Fixed in
DC Undervoltage No errors reported in EMS
8.2.4 and 8.3.1
DC Undervoltage constant EMS reporting
8.2.4, 8.3.1P1, and 8.3.2RC2
DC Undervoltage EMS report every 6 hrs
  • The storage show fault  output will indicate 'No faults found in storage subsystem'.
    However, the "storage show fault –v" will display the following status:

Power Supplies:
Element Status         Status Bytes  Status Descriptions
  1: OK                01,00,04,A0   DC UNDER VOLTAGE, RQSTED ON
  2: OK                01,00,00,A0   RQSTED ON


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