Resolving disruptions between storage systems replicating a dataset

An apparatus comprising a computer processor, a computer memory operatively coupled to the computer processor, the computer memory having disposed within it computer program instructions that, when executed by the computer processor, cause the apparatus to carry out the steps of:

• requesting, by one or more storage systems in response to detecting a triggering event, mediation from a mediation service external to the one or more storage systems, wherein the mediation service is configured to resolve which storage system continues to service a dataset after the triggering event;
• and
• processing, by a first storage system that received a positive mediation result from the mediation service, data storage requests directed to the dataset, wherein storage systems that did not receive a positive mediation result from the mediation service do not process data storage requests directed to the dataset.