Replacing the NVMEM battery

To replace the NVMEM battery in your system, you must remove the failed NVMEM battery from the system and replace it with a new NVMEM battery.


  1. If you are not already grounded, properly ground yourself.
  2. Check the NVMEM LED:
    • If your system is in an HA configuration, go to the next step.
    • If your system is in a stand-alone configuration, cleanly shut down the controller module, and then check the NVRAM LED identified by the NV icon.

      Attention: The NVRAM LED blinks while destaging contents to the flash memory when you halt the system. After the destage is complete, the LED turns off.
      • If power is lost without a clean shutdown, the NVMEM LED flashes until the destage is complete, and then the LED turns off.
      • If the LED is on and power is on, unwritten data is stored on NVMEM.

        This typically occurs during an uncontrolled shutdown after ONTAP has successfully booted.

  3. Locate the NVMEM battery in the controller module.
  4. Locate the battery plug and squeeze the clip on the face of the battery plug to release the plug from the socket, and then unplug the battery cable from the socket.
  5. Remove the battery from the controller module and set it aside.
  6. Remove the replacement battery from its package.
  7. Loop the battery cable around the cable channel on the side of the battery holder.
  8. Position the battery pack by aligning the battery holder key ribs to the "V" notches on the sheet metal side wall.
  9. Slide the battery pack down along the sheet metal side wall until the support tabs on the side wall hook into the slots on the battery pack, and the battery pack latch engages and clicks into the opening on the side wall.
  10. Plug the battery plug back into the controller module.