A storage system of the present invention carries out remote copying among a plurality of sites, detects a new copy path when a failure occurs, and resumes remote copying. The storage system comprises a plurality of sites. Each site comprises a host and a storage controller. The controller of each site comprises a copy controller, a failure detector, a candidate detector, and a resume controller. The failure detector detects a failure that occurs in a remote copy configuration. The candidate detector detects a candidate for a copy path. The resume controller resumes remote copying using any one copy path from among copy path candidates detected in the respective sites.