CONTROLLER AND OPERATION METHOD THEREOF
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United States of America Patent
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Issued Date -
Jun 11, 2020
app pub date -
Nov 8, 2019
filing date -
Dec 5, 2018
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Abstract
Provided is an operation method of a controller which controls a memory device including a plurality of memory blocks. The operation method may include calculating a number of extended free blocks in the memory device based on valid page counts of the respective memory blocks, when a number of substantive free blocks in the memory device is less than a first threshold value, and performing a garbage collection operation when the number of extended free blocks is less than a second threshold value.
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