Valid page threshold based garbage collection for solid state drive
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United States of America Patent
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Aug 5, 2014
Grant Date -
Jan 30, 2014
app pub date -
Jul 27, 2012
filing date -
Jul 27, 2012
priority date (Note) -
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Abstract
A method for garbage collection in a solid state drive (SSD) includes determining whether the SSD is idle by a garbage collection module of the SSD; based on determining that the SSD is idle, determining a victim block from a plurality of memory blocks of the SSD; determining a number of valid pages in the victim block; comparing the determined number of valid pages in the victim block to a valid page threshold; and based on the number of valid pages in the victim block being less than the valid page threshold, issuing a garbage collection request for the victim block.
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