Remote copy system and remote copy management method

A remote copy system comprising:

• a first storage system that provides a primary site;
• and
• a second storage system that provides a secondary site, wherein
• a storage controller of the remote copy system
• performs remote copy which is to remotely copy data and operation processed at the primary site while operating the primary site from a first data volume of the first storage system to a second data volume of the second storage system,
• in the secondary site, reflects data which is transmitted at the remote copy in the second data volume, and perform operation which is processed at the primary site and transmitted at the remote copy,
• after a failover is performed from the primary site to the secondary site, accumulates data and operation that are processed at the secondary site in a journal volume of the second storage system as a secondary site journal, and
• reflects data of the secondary site journal in the first data volume and restores the first data volume by performing operation of the secondary site journal in the primary site when the primary site is recovered.