Storage system, storage apparatus, and data restoration method
AssigneeFujitsu Limited
InventorSatoshi SONOBE
Life of this patent
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Abstract
In a storage system a first control device can restore in a restoration destination storage device a second set of data stored in a second storage device on the basis of a first set of data stored in a first storage device. A third storage device stores progress information indicative of the progress of restoration performed by a first control device. A second control device restores a portion of the second set of data which is not yet restored on the basis of the progress information stored in the third storage device at the time of detecting that the first control device has stopped.
Claims6
A storage system comprising:
- a plurality of storage devices including a first storage device and a second storage device;
- a first control device which restores, based on a first set of data stored in the first storage device, a second set of data stored in the second storage device in a restoration destination storage device which is one of the plurality of storage devices;
- a third storage device which stores progress information indicative of progress of restoration performed by the first control device;
- and
- a second control device which restores a portion of the second set of data which is not yet restored on the basis of the progress information stored in the third storage device upon detecting that the first control device has stopped.
A storage apparatus comprising:
- a plurality of storage sections including a first storage section and a second storage section;
- a third storage section which stores progress information indicative of progress of restoration performed by a control device that restores, based on a first set of data stored in the first storage section, a second set of data stored in the second storage section in a restoration destination storage section which is one of the plurality of storage sections;
- and
- a control section which restores a portion of the second set of data which is not yet restored on the basis of the progress information stored in the third storage section upon detecting that the control device has stopped.
A data restoration method performed in a storage system including:
- a plurality of storage devices including a first storage device and a second storage device;
- and
- first and second control devices (1f and 1g) which restore, based on a first set of data stored in the first storage device, a second set of data stored in the second storage device in a restoration destination storage device which is one of the plurality of storage devices,
- the data restoration method comprising:
- using, by the storage system, the first control device for restoring in order portions of the second set of data and storing progress information indicative of progress of restoration in a third storage device other than the plurality of storage devices;
- and
- using, by the storage system, the second control device for taking over restoration of a portion of the second set of data which is not yet restored on the basis of the progress information stored in the third storage device upon detecting that the first control device has stopped.
Dependencies are inferred from the claim text.