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Install and maintain

Overview of controller replacement - ASA A800

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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.

Note

NetApp strongly recommends that you enable console logging on the devices you are working with and take the following actions when performing this procedure:

  • Leave AutoSupport enabled during your maintenance. This allows NetApp support to receive diagnostic information if issues occur.

  • Enable session logging for any CLI sessions. This creates a complete record of all commands and system output during the maintenance activity. For guidance on how to enable session logging, see How to configure PuTTY for optimal connectivity to ONTAP systems.

  • 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.

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

    • The healthy controller is the surviving controller.

Note Do not downgrade the BIOS version of the replacement controller to match the partner controller or the old controller module.