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US 9,317,424 B2Granted
Storage device and information processing system
AssigneeSony Corporation
InventorsToshiyuki Nishihara, Yoshio Sakai
Life of this patent
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Abstract
A storage device able to make a redundant write operation of unselected data unnecessary and able to optimize an arrangement of pages to a state having a high efficiency for rewriting, wherein the storage device has a first memory unit, a second memory unit having a different access speed from the first memory, and a control circuit, wherein the control circuit has a function of timely moving the stored data in two ways between the first memory unit and the second memory unit having different access speeds in reading or rewriting.
Claims21
A storage device comprising:
- an address conversion table configured to store a first physical address at a first logical address and to store a second physical address at a second logical address;
- a first memory unit configured to store units of data in continuous regions of the first memory unit;
- a second memory unit configured to store units of information in continuous regions of the second memory unit, an access speed of the first memory unit differing from an access speed of the second memory unit;
- and
- a control circuit configured to transfer one of the units of data from the first memory unit to the second memory unit and to transfer one of the units of information from the second memory unit to the first memory unit,
- wherein the control circuit is configured to use the second logical address to locate said one of the units of information in the second memory unit.
3 more elements
Dependencies are inferred from the claim text.