公开(公告)号：US20230350808A1

公开(公告)日：2023-11-02

申请号：US17637429

申请日：2021-03-16

Applicant: Micron Technology, Inc.

Inventor： Xing Wang ,  Liping Xu ,  Xu Zhang ,  Zhen Gu

IPC: G06F12/10

CPC classification number: G06F12/10

Abstract: Methods, systems, and devices for logical-to-physical (L2P) mapping compression techniques are described. A memory system may use an L2P mapping to map logical addresses to physical addresses of the memory system. The L2P mapping may be a hierarchical L2P mapping divided into multiple levels or subsets that are used to identify a physical address corresponding to a logical address. The memory system may write data to a set of physical addresses that are consecutively indexed and may set a flag in an entry of a second-level of the L2P mapping (e.g., of a three-level L2P mapping) to indicate that the entry is associated with a starting physical address of the consecutively indexed physical addresses. The memory system may subsequently read the data starting at the starting physical address based on the flag (e.g., bypassing reading an entry of a lowest-level of the L2P mapping to determine the physical address).

公开(公告)号：US11720278B2

公开(公告)日：2023-08-08

申请号：US17869262

申请日：2022-07-20

Applicant: Micron Technology, Inc.

Inventor： Huachen Li ,  Xu Zhang ,  Zhong Xian Li ,  Xinghui Duan ,  Xing Wang ,  Tian Liang

IPC: G06F3/06 ,  G06F12/02 ,  G06F12/0882

CPC classification number: G06F3/0656 ,  G06F3/0604 ,  G06F3/0652 ,  G06F3/0659 ,  G06F3/0679 ,  G06F12/0246 ,  G06F12/0882 ,  G06F2212/7201 ,  G06F2212/7205 ,  G06F2212/7209

Abstract: Devices and techniques for data removal marking in a memory device are described herein. A delete command can be received at the memory device. A count of data portions in the delete command can be compared to determine whether the count is below a threshold. In response to determining that the count of data portions is below the threshold, the data portions can be written to a buffer. When a buffer full event is detected, a segment of an L2P data structure can be loaded into working memory of the memory device. Then, each record in the segment of the L2P data structure that has a corresponding entry in the buffer can be updated to mark the data as removable (e.g., invalid).