Installing the controller module

After you install the components from the old controller module into the new controller module, you must install the new controller module into the system chassis and boot the operating system.

About this task

For HA pairs with two controller modules in the same chassis, the sequence in which you install the controller module is especially important because it attempts to reboot as soon as you completely seat it in the chassis.
Note: The system might update system firmware when it boots. Do not abort this process. The procedure requires you to interrupt the boot process, which you can typically do at any time after prompted to do so. However, if the system updates the system firmware when it boots, you must wait until after the update is complete before interrupting the boot process.


  1. If you have not already done so, replace the cover on the controller module.
  2. Align the end of the controller module with the opening in the chassis, and then gently push the controller module halfway into the system.
    Note: Do not completely insert the controller module in the chassis until instructed to do so.
  3. Cable the management and console ports only, so that you can access the system to perform the tasks in the following sections.
    Note: You will connect the rest of the cables to the controller module later in this procedure.
  4. Complete the reinstallation of the controller module. The controller module begins to boot as soon as it is fully seated in the chassis. Be prepared to interrupt the boot process.
    1. With the cam handle in the open position, firmly push the controller module in until it meets the midplane and is fully seated, and then close the cam handle to the locked position.
      Attention: Do not use excessive force when sliding the controller module into the chassis to avoid damaging the connectors.
      The controller begins to boot as soon as it is seated in the chassis.
    2. If you have not already done so, reinstall the cable management device.
    3. Bind the cables to the cable management device with the hook and loop strap.
    4. Interrupt the boot process only after determining the correct timing:

      You must look for an Automatic firmware update console message. If the update message appears, do not press Ctrl-C to interrupt the boot process until after you see a message confirming that the update is complete.

      Only press Ctrl-C when you see the message Press Ctrl-C for Boot Menu.

      Note: If the firmware update is aborted, the boot process exits to the LOADER prompt. You must run the update_flash command and then exit LOADER and boot to Maintenance mode by pressing Ctrl-C when you see Starting AUTOBOOT press Ctrl-C to abort.

      If you miss the prompt and the controller module boots to ONTAP, enter halt, and then at the LOADER prompt enter boot_ontap, press Ctrl-C when prompted, and then boot to Maintenance mode.

      Important: During the boot process, you might see the following prompts:
      • A prompt warning of a system ID mismatch and asking to override the system ID.
      • A prompt warning that when entering Maintenance mode in an HA configuration you must ensure that the healthy node remains down.

      You can safely respond y to these prompts.

    5. Select the option to boot to Maintenance mode from the displayed menu.