Data Storage Device and Data Maintenance Method thereof
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United States of America Patent
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Oct 5, 2017
app pub date -
Feb 20, 2017
filing date -
Mar 31, 2016
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Abstract
The present invention provides a data storage device including a flash memory and a controller. The flash memory has a plurality of first type spare blocks and a plurality of second type spare blocks, wherein the second type spare blocks are capable to store more data volume than the first type spare blocks. The controller writes data into the first type spare blocks, defines the first type spare blocks as first type data blocks if stored with data. When a predetermined condition is satisfied, the controller starts to move/copy valid data of a plurality of oldest first type data blocks into one of the second type spare blocks.
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