US 11,874,775 B2
Method and apparatus for performing access operation in memory system utilizing map data including mapping relationships between a host and a memory device for storing data
Eu-Joon Byun, Gyeonggi-do (KR)
Assigned to SK hynix Inc., Gyeonggi-do (KR)
Filed by SK hynix Inc., Gyeonggi-do (KR)
Filed on Apr. 7, 2020, as Appl. No. 16/842,416.
Claims priority of application No. 10-2019-0088266 (KR), filed on Jul. 22, 2019.
Prior Publication US 2021/0026778 A1, Jan. 28, 2021
Int. Cl. G06F 12/10 (2016.01); G06F 12/06 (2006.01)
CPC G06F 12/10 (2013.01) [G06F 12/0607 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A memory system comprising:
a memory device suitable for storing data; and
a controller in communication with the memory device through a memory interface, suitable for generating L2P map data which includes mapping relationships between a plurality of logical addresses of a host and a plurality of physical addresses of the memory device and a total number of consecutive physical addresses with each of the plurality of physical addresses, and suitable for transmitting the L2P map data therefrom to the host,
wherein, when a read request is received with logical information and physical information from the host, the controller performs an access operation on a physical address range calculated based on the logical information and the physical information,
wherein the physical information includes a reference physical address that is corresponded to a reference logical address included in the logical information, and a consecutive physical address number that is the total number of consecutive physical addresses associated with the reference physical address,
wherein the logical information includes a logical address range for indicating consecutive logical addresses with the reference logical address,
wherein the controller determines that a sequential read operation is performable when a number of the consecutive logical addresses is less than or equal to the consecutive physical address number, and
wherein the controller determines that a sequential prefetch operation is performable when the number of the first consecutive physical addresses is less than the consecutive physical address number.