Validation of storage volumes that are in a peer to peer remote copy relationship

摘要

A peer to peer remote copy operation is performed between a primary storage controller and a secondary storage controller, to establish a peer to peer remote copy relationship between a primary storage volume and a secondary storage volume. Subsequent to indicating completion of the peer to peer remote copy operation to a host, a determination is made as to whether the primary storage volume and the secondary storage volume have identical data, by performing operations of staging data of the primary storage volume from auxiliary storage of the primary storage controller to local storage of the primary storage controller, and transmitting the data of the primary storage volume that is staged, to the secondary storage controller for comparison with data of the secondary storage volume stored in an auxiliary storage of the secondary storage controller.