Storage system and data management method
AssigneeHitachi, Ltd.
InventorsTatsuya NINOMIYA, Kazuo TANAKA
Life of this patent
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Abstract
The present invention comprises a CHA 110 which transmits/receives data to/from an external device, a DKA 140 which transmits/receives data to/from an HDD unit 200, a primary cache unit 120 which has a primary cache memory 124, a secondary cache unit 130 which is installed between the primary cache unit 120 and the DKA 140 and has a secondary cache memory 134, a CCP 121 which stores write target data received by the CHA 110 in the primary cache memory 124, and a CCP 131 which stores the write target data in the secondary cache memory 134, and transfers the write target data stored in the secondary cache memory 134 to the DKA 140.
Claims7
A storage system comprising:
- a storage controller,
- a first volatile cache memory and a second volatile cache memory,
- a first non-volatile cache memory and a second non-volatile cache memory, and
- a plurality of disk drives,
- wherein, the storage controller configured to:
- receive write request from a computer,
- store write data corresponding to the write request in the first volatile cache memory and the second volatile cache memory, and
- store the write data, stored in the first volatile cache memory or the second volatile cache memory, in the first non-volatile cache memory and the second non-volatile cache memory, or store the write data stored in the fret volatile cache memory or the second. volatile cache memory, in the plurality of disk drives.
Dependencies are inferred from the claim text.