Invention Application
- Patent Title: SOLUTION FOR SUPER DEVICE IMBALANCE IN ZNS SSD
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Application No.: PCT/US2022/027970Application Date: 2022-05-06
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Publication No.: WO2023027781A1Publication Date: 2023-03-02
- Inventor: SURIANARAYANAN, Ravishankar , BJORLING, Matias
- Applicant: WESTERN DIGITAL TECHNOLOGIES, INC.
- Applicant Address: 5601 Great Oaks Parkway
- Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.
- Current Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.
- Current Assignee Address: 5601 Great Oaks Parkway
- Agency: VER STEEG, Steven H. et al.
- Priority: US17/412,140 2021-08-25
- Main IPC: G06F3/06
- IPC: G06F3/06
Abstract:
A data storage device includes a memory device and a controller coupled to the memory device. The memory device includes at least a first super device and a second super device. Each of the super devices includes a plurality of active zones and a threshold value for a number of cold zones. The controller classifies zones as either a cold zone or hot zone depending the number of resets to the zone. If the number of resets to the zone is greater than a threshold reset value, then the zone is classified as a hot zone, otherwise the zone is classified as a cold zone. The controller is configured to determine that the number of cold zones is greater than the threshold value for a super device and move data from at least one cold zone from the super device to a zone of another super device.
Information query