Information system, host system, and access control method

摘要

A first SS (storage system) that provides a first SA (storage area), a second SS that provides a second SA that forms a pair with the first SA, a first and a second HS (host system) connected to the first and second SSs ). A first path connecting the first HS and the first SA, a second path connecting the first HS and the second SA, a third path connecting the second HS and the first SA, and a fourth path connecting the second HS and the second SA. After recovering to a situation where WR (write request) may be transmitted to the first SS, when the first path has higher priority than the second path, the first SS transmits the first SA that is the write destination of the received WR Is a target of RC (remote data mirroring process), it sends a stop notification of RC to the second SS. The second SSs change control so that WR with the second SA as the write destination is controlled to fail. When the WR with the second SA as the write destination fails, the second HS transmits the WR using the third path having the lower priority than the fourth path.