You might need to replace the E2700 controller if it is not functioning optimally or it has failed.
The appliance Storage Node will not be accessible when you replace the controller. If the E2700 controller is functioning sufficiently, you can place the E5600SG controller into maintenance mode. Putting a StorageGRID appliance into maintenance mode might make the appliance unavailable for remote access.
When you replace a controller, you must remove the battery from the original controller and install it in the replacement controller.