Component fails, the redundant N +1 configuration, the vulnerability of the system in the form provided. Part (s), one independent backup component at least. During normal operation, the active ingredients as the resistance standby backup system, or not to participate in the following way, passive / active. During failover, the drop in the system (the system availability, block) to restore transparency place during failover, but it depends on the particular solution.

This activity - the other parts of the operation, the backup is a fully functional components, in one case, N 1 redundant, and can be active ingredients, but removed from component failure, the component will be able to run if the system is able to produce to be active.