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Install and maintain

Overview of controller module replacement - AFF A1K

Contributors dougthomp
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You must review the prerequisites for the replacement procedure and select the correct one for your version of the ONTAP operating system.

  • All drive shelves must be working properly.

  • The healthy controller must be able to take over the controller that is being replaced (referred to in this procedure as the “impaired controller”).

  • If your system is in a MetroCluster configuration, you must review the section Choosing the correct recovery procedure to determine whether you should use this procedure.

  • You must replace the failed component with a replacement FRU component you received from your provider.

  • You must be replacing a controller module with a controller module of the same model type. You cannot upgrade your system by just replacing the controller module.

  • You cannot change any drives or drive shelves as part of this procedure.

  • Because the boot device is located on the System Management module that is installed in the back of the system, you do not need to move the boot device when replacing a controller module.

  • It is important that you apply the commands in these steps on the correct systems:

    • The impaired controller is the controller that is being replaced.

    • The replacement controller is the new controller that is replacing the impaired controller.

    • The healthy controller is the surviving controller.

  • You must always capture the controller's console output to a text log file.

    This provides you a record of the procedure so that you can troubleshoot any issues that you might encounter during the replacement process.