| 摘要 |
A storage apparatus includes a storage unit and a controller for controlling the storage unit. A data volume, a journal volume, and a snapshot volume are formed in the storage unit. The storage apparatus stores, in accordance with a write request sent from a host apparatus, data specified in the write request in the data volume, and also stores, in accordance with a restoration point setting request sent from the host apparatus including a host apparatus timestamp, backup data associated with that host apparatus timestamp in a specific volume. In restoring data, the storage apparatus applies snapshot data to the data volume with reference to the host apparatus timestamp included in the restoration request sent from the host apparatus, and further applies journal data, thereby restoring data. Accordingly, the storage apparatus enables data restoration in response to a restoration request designating a particular time based on the time in the host apparatus. |
