US 11,657,001 B2
Data storage device and control method of address management using mapping tables
Sheng-Hsun Lin, Magong (TW)
Assigned to SILICON MOTION, INC., Jhubei (TW)
Filed by Silicon Motion, Inc., Jhubei (TW)
Filed on Jan. 26, 2022, as Appl. No. 17/584,753.
Claims priority of application No. 110106679 (TW), filed on Feb. 25, 2021.
Prior Publication US 2022/0269618 A1, Aug. 25, 2022
Int. Cl. G06F 12/1009 (2016.01)
CPC G06F 12/1009 (2013.01) [G06F 2212/651 (2013.01); G06F 2212/7201 (2013.01)] 20 Claims
OG exemplary drawing
 
11. A non-volatile memory control method, comprising:
operating a non-volatile memory as requested by a host,
establishing a first mapping table and a second mapping table;
looking up the first mapping table to map a first logical address to a first block substitute; and
looking up the second mapping table to map the first block substitute to a first physical block of the non-volatile memory,
wherein the first mapping table further records a first offset for the first logical address, wherein the first offset is separate from the first logical address and, according to the first offset recorded in the first mapping table, the first logical address is mapped to a first data management unit having the first offset in the first physical block represented by the first block substitute.