US 11,726,712 B2
Memory system with write modes based on an internal state of a memory controller
Yoshiki Saito, Kawasaki (JP)
Assigned to Kioxia Corporation, Tokyo (JP)
Filed by Kioxia Corporation, Tokyo (JP)
Filed on Jun. 10, 2021, as Appl. No. 17/344,230.
Claims priority of application No. 2020-156369 (JP), filed on Sep. 17, 2020.
Prior Publication US 2022/0083273 A1, Mar. 17, 2022
Int. Cl. G06F 3/06 (2006.01)
CPC G06F 3/0659 (2013.01) [G06F 3/0604 (2013.01); G06F 3/0679 (2013.01)] 43 Claims
OG exemplary drawing
 
1. A memory system connectible to a host, the system comprising:
a non-volatile memory; and
a controller controlling the non-volatile memory, wherein
the non-volatile memory comprises first and second memory areas,
the controller is configured to:
when receiving a write command in which data to be written to the non-volatile memory and a logical address for the host to access the data are designated, from the host, determine a write method of writing the data based on an internal state of the controller or a state of the non-volatile memory;
when a first method is determined as the write method, write the data to the first memory area by the first method; and
when a second method is determined as the write method, write the data to the second memory area by the second method,
the first method is a write method of writing the data to a physical address associated with the logical address designated in the write command when the data is written to the first memory area, and
the second method is a write method of writing the data to a physical address specified by the controller as a write destination of the data, irrespective of the logical address, when the data is written to the second memory area.