Patent ID: 7526618
Filing Date: 2009-04-28
Classification: G06F

Abstract:
1. A storage control system comprising: 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.