Service recovery method and device, arbitration server and storage system

The invention discloses a service recovery method and device, an arbitration server and a storage system. The method comprises the following steps: after the storage system is switched from a dual-slave state to a fail recovery state, enabling a first storage array to send a first arbitration request to an arbitration server, and after the arbitration server receives the first arbitration request sent by the first storage array, sending the first arbitration request to the arbitration server; and if so, determining a first arbitration result of the first storage array and a second arbitration result of the second storage array, and after the first arbitration result and the second arbitration result are determined, sending the first arbitration result to the first storage array and sending the second arbitration result to the second storage array. And after receiving the first arbitration result, the first storage array initiates negotiation to the second storage array to determine a negotiation result, and i