Method and system for managing background operations in a multi-layer memory
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United States of America Patent
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Aug 15, 2017
Grant Date -
Jul 3, 2014
app pub date -
Mar 14, 2013
filing date -
Dec 31, 2012
priority date (Note) -
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Abstract
A multi-layer memory and method for performing background maintenance operations are disclosed. The memory includes a plurality of flash memory die having multiple layers, where each layer is made up of flash memory cells having a greater bit per cell storage capacity than then prior layer and each layer may have a plurality of partitions for different data types. A controller managing the flash memory die is configured to identify an idle die and determine if a layer in the die satisfies a background maintenance criterion. Upon identifying a layer satisfying the background maintenance criterion, the valid data from reclaim blocks in the layer is relocated into a relocation block in the same layer until the relocation block is filled and the background maintenance cycle ends.
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