Storage device and operating method of storage device
AssigneeSamsung Electronics Co., Ltd.
InventorsSeokhwan Kim, Yonggil Song, Chui Lee, Jooyoung Hwang
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Abstract
A storage device includes a nonvolatile memory device, a random access memory that includes a first region and a second region, and a controller that is configured to use the first region of the random access memory as a journal memory for a journal indicating modification of data of the second region, expose a user region of the nonvolatile memory device to an external host device as a first access region of a block unit, and expose the second region of the random access memory to the external host device as both a second access region of the block unit and a third access region of a byte unit.
Claims5
A storage device comprising:
- a nonvolatile memory device;
- a dynamic random access memory including a first region and a second region including a set of segments;
- and
- a controller configured to,
- use the first region as a device memory;
- use the second region of the dynamic random access memory to store data for a modification during a first time;
- use the second region as a journal memory to store a journal indicating the modification during second time,
- expose a user region of the nonvolatile memory device to an external host device as a first access region of a block unit,
- select a first segment of the segments, to select at least two second segments from the remaining segments of the segments other than the first segment, and
- provide non volatility to the selected segments,
- wherein the at least two second segments are dynamically changed in a ring buffer manner within the remaining segments, and
- wherein the modification is for data of the user region.
An operating method of a storage device including a controller, a nonvolatile memory device, and a dynamic random access memory, the method comprising:
- providing, by the controller, a portion of a storage space of the nonvolatile memory device to an external host device as a user region;
- and
- providing, by the controller, a portion of a storage space of the dynamic random access memory to the external host device as a journal region, a write operation of a byte unit and a read operation of a block unit being permitted, the journal region including segments, and
- providing, by the controller, nonvolatility to a first segment and at least two second segments from among the segments, the first segment being fixed and the at least two second segments being dynamically changed.
Dependencies are inferred from the claim text.