The restoration of a system in a state of failover back to its original state (before the failure occurred).(noun)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "failback" in a sentence
"To be clear: the failback is not strickly to deter Iran, but to checkmate more capable nuclear forces from arraying their atomic weaponry in defense of Iran to Israel’s great strategic detriment."
"Put bluntly, Israel must have a credible failback on the nuclear forces of the United States to deter IRAN from a first strike if Iran gains that capacity."
"EMC's new Celerra Plug-Ins for VMware Environments adds several new capabilities, including an automated failback process for VMware vCenter Site Recovery Manager software."