STORAGE DEVICE INCLUDING NONVOLATILE MEMORY DEVICE AND OPERATING METHOD OF STORAGE DEVICE

    公开(公告)号:US20240069750A1

    公开(公告)日:2024-02-29

    申请号:US18240169

    申请日:2023-08-30

    CPC classification number: G06F3/0619 G06F3/0631 G06F3/0652 G06F3/0679

    Abstract: A storage device, including: a nonvolatile memory device including a plurality of memory cells; and a controller configured to perform a write operation on at least one write unit included in the plurality of memory cells, and to perform an erase operation on at least one erase unit included in the plurality of memory cells, wherein the controller is further configured to: allocate a plurality of zones to a storage space of the nonvolatile memory device in response to a request of an external host device, select two or more erase units among a plurality of erase units of the plurality of memory cells to be allocated to each of the plurality of zones based on a zone map table, fixedly and sequentially manage logical addresses of data written in the plurality of zones, wherein the controller includes an internal buffer configured to store first data to be written in a first zone from among the plurality of zones, and wherein the controller is further configured to perform a backup operation for the first data by selecting an erase unit in which the first data are to be written, and a cell type of the erase unit based on a feature of the first zone.

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