Upgrade status of the device.
init -The current status of the device is Init.
loading -The current status of the device is Loading.
loaded -The current status of the device is Loaded.
switching -The current status of the device is Switching.
switchover -The current status of the device is Switchover.
committing -The current status of the device is Committing.
committed -The current status of the device is Committed.
rollbacking -The current status of the device is Rollbacking.
rollbacked -The current status of the device is Rollbacked.