Flash controllers, methods, and corresponding storage devices capable of rapidly/fast generating or updating contents of valid page count table
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United States of America Patent
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Apr 18, 2023
Grant Date -
May 13, 2021
app pub date -
Jan 20, 2021
filing date -
Jul 17, 2018
priority date (Note) -
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status (Latency Note)
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Abstract
A method of a flash controller to be coupled between a flash memory device and a host device is provided. The flash memory device has a plurality of blocks each having a plurality of pages, and the method comprises: receiving a trim/erase/unmap command from the host device; obtaining a storage space, which is to be erased, from the trim/erase/unmap command; comparing a space size of the storage space with a threshold to determine whether the space size is larger than the threshold; and resetting valid page counts of the plurality of blocks of the flash memory device when the space size is larger than the threshold.
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