Start a Database
The Start button shown triggers a startup of all database instances on the active nodes of the cluster. This has the same effect as the action Startup that can be selected on the database page. A special case is Startup Maintenance on the same page: It allows connections with any password, which can be helpful if the password of the sys user was forgotten but imposes a security concern otherwise.
Restart essentially triggers a Shutdown followed automatically by Startup. Difference is that the Restart doesn’t obtain the License value from the License Server like the sequence Shutdown->Startup does.