• 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.
• In this procedure, the boot device is moved from the impaired controller to the replacement controller so
that the replacement controller will boot up in the same version of ONTAP as the old 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 node 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 file.
This provides you a record of the procedure so that you can troubleshoot any issues that you might
encounter during the replacement process.
Shut down the impaired controller - AFF C400
Shut down or take over the impaired controller using the appropriate procedure for your
configuration.
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