Storage system, data protection method and management computer, including arrangement for data replication between storage devices

摘要

The configuration of a copy pair is prevented in which data replication is conducted from a secondary system to a primary system and data is protected. A first storage device manages first information including a first measurement result related to a command received from a first host, and a second storage device manages second information including a second measurement result related to a command received from a second host. When a management computer makes an instruction to configure data replication from a first volume to a second volume, a storage system determines whether data replication from the first volume to the second volume or data replication from the second volume to the first volume is replication from the primary system to the secondary system based on the managed first information and second information, and the determined result is displayed on the management computer.