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US 2006/0150001 A1Published application
Data restoring method and an apparatus using journal data and an identification information
AssigneeHitachi, Ltd.
InventorsYoshiaki Eguchi, Kazuhiko Mogi, Yasutomo Yamamoto, Takashi Oeda, Kouji Arai
Life of this patent
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Abstract
A host and a storage system each keep a shared identifier indicating a state of a system. The storage system acquires, at update of data, a data pair including data for a change through processing of the host and data before the update. The storage system relates the data pair to a shared identifier. When the host indicates an identifier, the storage system restores data using the data pair.
Claims2
An information processing system comprising:
- a computer;
- and
- a storage system coupled to the computer,
- wherein the storage system further comprising:
- a control unit;
- a first storage;
- a second storage;
- and
- a third storage,
- wherein the control unit copies, according to a predetermined indication, data stored in the first storage onto the second storage;
- stores, when a request to update data stored in the first storage is requested after the predetermined indication, contents of update of the data in the third storage as an update history;
- and records, when predetermined identification information is sent from the computer after the predetermined indication, the predetermined identification information with a correspondence established between the predetermined identification information and the update history.
9 more elements
2-13. (canceled)
Dependencies are inferred from the claim text.