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US 9,070,463 B2Granted
Flash memory module for realizing high reliability
AssigneeHitachi, Ltd.
InventorAkifumi Suzuki
Life of this patent
Estimating the term…
Abstract
A flash memory module may include a plurality of flash memory chips. The memory chips may include one or more blocks. Each block may be a unit of erasing data. A flash controller may be coupled to the plurality of flash memory chips. The flash controller may program data to block and erase data from a block. The flash controller may manage a recent programming time for each of the plurality of blocks. The flash controller may erase data stored in a block for which an elapsed programming time is larger than a first value.
Claims12
A flash memory module comprising:
- a plurality of flash memory chips including a plurality of blocks, each of which is an unit of erasing data, and
- a flash controller, which is coupled to the plurality of flash memory chips, configured to program data to a block and erase data from a block, wherein
- the flash controller is configured to:
- manage, for each of the plurality of blocks, a recent programming time which is a time at which data is recently programmed to a block and
- erase data stored in a block for which an elapsed programming time, which is a time period from the recent programming time, is relatively long among the plurality of blocks.
2 more elements
A storage apparatus comprising:
- a plurality of flash memory modules, each of the plurality of flash memory modules including a plurality of blocks, each of which is an unit of erasing data, and
- a flash controller, which is coupled to the plurality of flash memory chips, configured to program data to a block and erase data from a block, wherein
- the flash controller is configured to:
- manage, for each of the plurality of blocks, a recent programming time which is a time at which data is recently programmed to a block and
- erase data stored in a block for which an elapsed programming time, which is a time period from the recent programming time, is relatively long among the plurality of blocks.
2 more elements
Dependencies are inferred from the claim text.