With the rapid development of information systems in critical applications,their disaster recovery capability becomes a focus point.Failure detection algorithm is one of the crucial techniques in building a disaster recovery system.Fast,efficient and accurate failure detection is the precondition and guarantee for the realization of the disaster recovery effectively.This  paper studies a FDADRBR failure detection algorithm based on ring topology.Our FDADRBR algorithm remedies the deficiencies of ring topology when applied to disaster recovery,and resolves the single failure of the tree topology with less overhead.The experimental results indicate that this algorithm not only has higher accuracy,less network overhead and lower diagnosis latency,but also effectively enhances the failure detection algorithm’s expandability in disaster recovery,and can be used to manage the information systems of disaster tolerance.