| 摘要 |
<p>A highly advantageous storage system and a snapshot management method are provided. In the storage system, write target data sent from a host computer (4) to a first storage controller (10) is duplicated and stored in the first storage controller (40) and also in a second storage controller; when the first storage controller receives a request from the host computer to create a snapshot in the second storage controller, it suspends transferring differential data to the second storage controller, creates a new first snapshot, and transfers differential data for the created first snapshot together with the untransferred differential data for a previous first snapshot for which transferring had been suspended, to the second storage controller.
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