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Install and maintain

Requirements and considerations - AFF C30 and AFF C60

Contributors netapp-jsnyder
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You must review the requirements and considerations for the controller replacement procedure.

Requirements

  • All 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”).

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

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

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

    The console output provides you with a record of the procedure you can use to troubleshoot issues you might encounter during the replacement process.

Considerations

  • It is important that you apply the commands in this procedure to the correct controller:

    • 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.

  • If needed, you can turn on the storage system location (blue) LEDs to aid in physically locating the affected storage system. Log into the BMC using SSH and enter the system location-led on command.

    A storage system has three location LEDs: one on the operator display panel and one on each controller. Location LEDs remain illuminated for 30 minutes.

    You can turn them off by entering the system location-led off command. If you are unsure if the LEDs are on or off, you can check their state by entering the system location-led show command.