公开(公告)号：US11581052B2

公开(公告)日：2023-02-14

申请号：US17010914

申请日：2020-09-03

Applicant: Kioxia Corporation

Inventor： Akiyoshi Hashimoto ,  Makoto Kuribara ,  Takeshi Tomizawa ,  Katsuhiko Ueki

IPC: G11C29/02 ,  G11C16/16 ,  G11C16/26 ,  G11C16/34 ,  G11C11/56 ,  G11C16/08 ,  G11C29/00

Abstract: According to one embodiment, a memory system includes a non-volatile memory and a controller. The memory includes a plurality of storage areas. Each of the storage areas includes a plurality of memory cells to which threshold voltages are set in accordance with data. The controller acquires a first threshold voltage distribution of memory cells in a first storage area of the storage areas. The controller acquires a second threshold voltage distribution of memory cells in a second storage area of the storage areas. The controller detects non-normalcy in the first storage area or the second storage area from a first divergence quantity between the first threshold voltage distribution and the second threshold voltage distribution.

公开(公告)号：US11947400B2

公开(公告)日：2024-04-02

申请号：US18200453

申请日：2023-05-22

Applicant: Kioxia Corporation

Inventor： Yoshihisa Kojima ,  Katsuhiko Ueki

IPC: G06F1/00 ,  G06F1/26 ,  G06F12/02

CPC classification number: G06F1/263 ,  G06F12/0246 ,  G06F2212/2028 ,  G06F2212/205

Abstract: In a memory system in an embodiment, in a case of normal operation, a control unit returns a write completion response upon completion of reception of write data from a host, and writes the write data into nonvolatile memory in a multiple values. In a case of unordinary power-off, changeover to operation using a backup battery is conducted and the control unit writes dirty data that is not completed in writing into the nonvolatile memory, into the nonvolatile memory with two values. When next boot, the control unit reads the dirty data from the nonvolatile memory into the volatile memory, and thereafter writes the dirty data into the nonvolatile memory in a multiple values.

公开(公告)号：US11435799B2

公开(公告)日：2022-09-06

申请号：US16988326

申请日：2020-08-07

Applicant: Kioxia Corporation

Inventor： Yoshihisa Kojima ,  Katsuhiko Ueki

IPC: G06F1/00 ,  G06F1/26 ,  G06F12/02

Abstract: In a memory system in an embodiment, in a case of normal operation, a control unit returns a write completion response upon completion of reception of write data from a host, and writes the write data into nonvolatile memory in a multiple values. In a case of unordinary power-off, changeover to operation using a backup battery is conducted and the control unit writes dirty data that is not completed in writing into the nonvolatile memory, into the nonvolatile memory with two values. When next boot, the control unit reads the dirty data from the nonvolatile memory into the volatile memory, and thereafter writes the dirty data into the nonvolatile memory in a multiple values.

公开(公告)号：US11693463B2

公开(公告)日：2023-07-04

申请号：US17878788

申请日：2022-08-01

Applicant: Kioxia Corporation

Inventor： Yoshihisa Kojima ,  Katsuhiko Ueki

IPC: G06F1/00 ,  G06F1/26 ,  G06F12/02

CPC classification number: G06F1/263 ,  G06F12/0246 ,  G06F2212/205 ,  G06F2212/2028

Abstract: In a memory system in an embodiment, in a case of normal operation, a control unit returns a write completion response upon completion of reception of write data from a host, and writes the write data into nonvolatile memory in a multiple values. In a case of unordinary power-off, changeover to operation using a backup battery is conducted and the control unit writes dirty data that is not completed in writing into the nonvolatile memory, into the nonvolatile memory with two values. When next boot, the control unit reads the dirty data from the nonvolatile memory into the volatile memory, and thereafter writes the dirty data into the nonvolatile memory in a multiple values.

公开(公告)号：US20230288973A1

公开(公告)日：2023-09-14

申请号：US18200453

申请日：2023-05-22

Applicant: Kioxia Corporation

Inventor： Yoshihisa Kojima ,  Katsuhiko Ueki

IPC: G06F1/26 ,  G06F12/02

CPC classification number: G06F1/263 ,  G06F12/0246 ,  G06F2212/205 ,  G06F2212/2028

Abstract: In a memory system in an embodiment, in a case of normal operation, a control unit returns a write completion response upon completion of reception of write data from a host, and writes the write data into nonvolatile memory in a multiple values. In a case of unordinary power-off, changeover to operation using a backup battery is conducted and the control unit writes dirty data that is not completed in writing into the nonvolatile memory, into the nonvolatile memory with two values. When next boot, the control unit reads the dirty data from the nonvolatile memory into the volatile memory, and thereafter writes the dirty data into the nonvolatile memory in a multiple values.

公开(公告)号：US20220365577A1

公开(公告)日：2022-11-17

申请号：US17878788

申请日：2022-08-01

Applicant: Kioxia Corporation

Inventor： Yoshihisa Kojima ,  Katsuhiko Ueki

IPC: G06F1/26 ,  G06F12/02

Abstract: In a memory system in an embodiment, in a case of normal operation, a control unit returns a write completion response upon completion of reception of write data from a host, and writes the write data into nonvolatile memory in a multiple values. In a case of unordinary power-off, changeover to operation using a backup battery is conducted and the control unit writes dirty data that is not completed in writing into the nonvolatile memory, into the nonvolatile memory with two values. When next boot, the control unit reads the dirty data from the nonvolatile memory into the volatile memory, and thereafter writes the dirty data into the nonvolatile memory in a multiple values.

公开(公告)号：US11301373B2

公开(公告)日：2022-04-12

申请号：US17107236

申请日：2020-11-30

Applicant: KIOXIA CORPORATION

Inventor： Daisuke Hashimoto ,  Shigehiro Asano ,  Katsuhiko Ueki ,  Mark Hayashida

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

Abstract: A storage device includes a nonvolatile memory including a plurality of physical blocks, a communication interface connectable to a host, and a controller. The controller is configured to generate metadata of host data, which include user data and metadata of the user data, and write, in a physical block of the nonvolatile memory, the metadata of the host data, the metadata of the user data, and the user data continuously in this order, when the host data are received through the communication interface in association with a write command.