Memory system, control method, and control device
AssigneeToshiba Memory Corporation
InventorsRiki Suzuki, Yoshihisa Kojima, Toshikatsu Hida
Life of this patent
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Abstract
According to one embodiment, a memory system includes a memory and a controller electrically connected to the memory. The memory includes blocks. Each of the blocks includes one or more sub-blocks. Each of the one or more sub-blocks includes nonvolatile memory cells. The controller is configured to obtain read frequency of at least one of the sub-blocks, and move data stored in the at least one of the sub-blocks so that data having substantially the same read frequency are written into one block.
Claims19
A memory system comprising:
- a memory including blocks, each of the blocks including one or more sub-blocks, each of the one or more sub-blocks including nonvolatile memory cells;
- and
- a controller electrically connected to the memory and configured to
- obtain read frequency of at least one of the sub-blocks, and
- move data stored in the at least one of the sub-blocks so that data having substantially the same read frequency are written into one block.
A control method of a memory system, the memory system including a memory and a controller wherein the memory includes blocks, each of the blocks includes one or more sub-blocks, each of the one or more sub-blocks includes nonvolatile memory cells, and the controller is electrically connected to the memory, the control method comprising:
- obtaining read frequency of at least one of the sub-blocks;
- and
- moving data stored in the at least one of the sub-blocks so that data having substantially the same read frequency are written into one block.
A control device electrically connected to a memory including blocks, each of the blocks including one or more sub-blocks, each of the one or more sub-blocks including nonvolatile memory cells, the control device comprising:
- circuitry configured to obtain read frequency of at least one of the sub-blocks;
- and
- a controller configured to control movement of data stored in the at least one of the sub-blocks so that data having substantially the same read frequency are written into one block.
Dependencies are inferred from the claim text.