a first host system,

a first storage controller connected to the first host system;

a second storage controller; and

a third storage controller;

wherein said first controller, said second controller and said third controller are interconnected with each other; and

wherein:

the first storage controller comprises a first command device and a first volume, the first command device being a destination of a control command issued by the host system, and the first volume being a destination of write data sent from the host system;

the second storage controller comprises a second command device and a second volume, the second command device being a destination of the control command received via the first command device of the first storage controller, and the second volume being a remote-copy pair with the first volume and a destination of copy data of the write data stored in the first volume; and

the third storage controller comprises a third command device and a third volume, the third command device being a destination of the control command sent via the second command device as well as the first comand device, and the third volume being a remote-copy pair with the second volume and a destination of the copy data stored in the second volume,

wherein:

in case where a failure of connection between the first storage controller and the second storage controller occurs, the third storage controller:

issues, in response to a control command regarding suspension received by the third command device via the first command device, a control command to the second command device, and

changes a status of the third volume to “primary”, and perform remote-copy pair between the third volume and the second volume in order to resume operation of the storage control system.