Method to reduce flash memory IOs with host maintained address mapping table
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United States of America Patent
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Jan 2, 2018
Issued Date -
N/A
app pub date -
Oct 21, 2015
filing date -
Oct 30, 2014
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Abstract
A system, method and program product for transferring contiguous blocks of data between a host storage and a flash memory. A method is disclosed that includes: receiving from a host at a flash controller a host command that specifies a contiguous set of LBAs and specifies a corresponding sub-section of an LBA to PBA mapping table; fetching the sub-section of the LBA to PBA mapping table from the host and storing the sub-section in a sub-mapping table; and for each LBA in the contiguous set of LBAs, performing a look-up into the sub-mapping table to retrieve a corresponding PBA and using the corresponding PBA to effectuate a data transfer between the host and flash memory from the flash controller.
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