failback

As nouns the difference between failover and failback

is that failover is an automatic switch to a secondary system on failure of the primary system, such as a means for ensuring high availability of some critical resource (such as a computer system), involving a parallel backup system which is kept running at all times so that, upon detected failure of the primary system, processing can be automatically shifted over to the backup. while failback is the restoration of a system in a state of failover back to its original state (before the failure occurred).

As nouns the difference between restoration and failback

is that restoration is the process of bringing an object back to its original state; the process of restoring something while failback is the restoration of a system in a state of failover back to its original state (before the failure occurred).