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US 2005/0240584 A1Published application
Data protection using data distributed into snapshots
AssigneeHewlett-Packard Development Company, L.P.
InventorsBrian Patterson, Lee Nelson
Life of this patent
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Abstract
A method of protecting data includes distributing data across a plurality of snapshots of a parent logical unit (LUN) when data of the parent LUN diverges from the snapshots.
Claims20
A method of protecting data comprising:
- distributing data across a plurality of snapshots of a parent logical unit (LUN) when data of the parent LUN diverges from the snapshots.
A storage system comprising:
- a physical store comprising a base volume and at least one physical block;
- a logical store comprising a snapshot volume and a snapshot index;
- and
- a snapshot subsystem capable of supporting pointers from the snapshot volume to selected ones of the physical blocks at a point-in-time, defining a parent logical unit (LUN), and distributing data across a plurality of snapshots of the parent LUN when data of the parent LUN diverges from the snapshots.
1 more element
A computer system for usage in a storage system with a physical store including a base volume and at least one physical block and a logical store including a snapshot volume and a snapshot index, the computer system comprising:
- a snapshot subsystem that distributes data across a plurality of snapshots of a parent LUN when data of the parent LUN diverges from the snapshots.
Dependencies are inferred from the claim text.