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.
Step 4: Reinstall the controller module
After you replace components in the controller module, reinstall it into the chassis.
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