System and method for tracking block level mapping overhead in a non-volatile memory
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United States of America Patent
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Mar 20, 2018
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app pub date -
Jul 20, 2016
filing date -
Jul 20, 2016
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Abstract
A system and method is disclosed for tracking block mapping overhead in a non-volatile memory. The system may include a non-volatile memory having multiple memory blocks and a processor configured to track a block level mapping overhead for closed blocks of the multiple memory blocks. The processor may be configured to track predetermined logical address ranges within which data written to a block fall, and then store the sum of the number of different logical address ranges for each respective block as a block address entropy metric. The method may include the processor using the block address entropy metric to select source blocks for garbage collection with a lower block address entropy metric or to adjust other operational characteristics such as data routing within the non-volatile memory system based on average block address entropy for a group of blocks.
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