Storage controller and data management method
AssigneeHitachi, Ltd.
InventorsKatsuo Mogi, Koji Nagata, Shoji Kodama, Ikuya Yagisawa
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Abstract
This storage controller providing a volume for storing data transmitted from a host system includes a management unit for managing the data written in the volume with a first block area, or a second block area in the first block area which is smaller than the first block area; a snapshot acquisition unit for acquiring a snapshot of the volume at a prescribed timing; and a transfer unit for transferring the data of the volume acquired with the snapshot of the snapshot acquisition unit to an external device with the first block area or the second block area.
Claims17
A storage controller providing a volume for storing data transmitted from a host system, comprising:
- a management unit for managing said data written in said volume with a first block area, or a second block area in said first block area which is smaller than said first block area;
- a snapshot acquisition unit for acquiring a snapshot of said volume at a prescribed timing;
- and
- a transfer unit for transferring said data of said volume acquired with said snapshot of said snapshot acquisition unit to an external device with said first block area or said second block area.
A data management method of a storage controller providing a volume for storing data transmitted from a host system, comprising:
- a first step for managing said data written in said volume with a first block area, or a second block area in said first block area which is smaller than said first block area;
- a second step for acquiring a snapshot of said volume at a prescribed timing;
- and
- a third step for transferring said data of said volume acquired with said snapshot of said snapshot acquisition unit to an external device with said first block area or said second block area.
Dependencies are inferred from the claim text.