Storage system, operation method for storage system, and computer-readable storage medium

By mapping the physical word line identifier as virtual word line identifier in the memory controller and generating verification data based on virtual word line identifier, the recovery problem when data reading fails in 3D memory is solved, and data reliability and storage efficiency are improved.

WO2025000150A9 Publication Date: 2025-03-20YANGTZE MEMORY TECH CO LTD
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Patent Information

Application Number
PCT/CN2023/102212
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Filing Date
2023-06-25
Publication Date
2025-03-20

AI Technical Summary

Technical Problem

When writing data to 3D memory, how to effectively generate and use verification data to ensure the accuracy and reliability of the data during reading, especially recovery in the event of failure of data reading.

Method used

By setting a mapping relationship in the memory controller, the physical word line identification is mapped as a virtual word line identification, so that the physical word line identification interval corresponding to the adjacent virtual word line identification is generated, thereby generating verification data based on the data of the adjacent virtual word line identification. This verification data is used to perform verification recovery when data read fails.

Benefits of technology

It improves the success rate of data recovery and the reliability of data storage and reading, and reduces the impact of mutual influence between adjacent physical word lines on the verification data.

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Abstract

The present application relates to the technical field of storage, and discloses a storage system, an operation method for the storage system, and a computer-readable storage medium. The storage system comprises: a memory and a memory controller; the memory comprises a storage array, the storage array is coupled to n word lines, the n word lines are sequentially arranged according to physical word line identifiers, and n≥2; the memory controller is configured to map the n physical word line identifiers into n virtual word line identifiers, wherein the physical word line identifiers corresponding to m adjacent virtual word line identifiers are spaced apart from each other, and 2≤m≤n; and the memory controller is configured to generate verification data on the basis of data corresponding to the m adjacent virtual word line identifiers. Verification data is generated on the basis of data corresponding to a plurality of adjacent virtual word line identifiers, that is, verification data is generated on the basis of data corresponding to a plurality of non-adjacent physical word line identifiers, thereby reducing the influence on verification data due to interaction between adjacent physical word lines, improving the success rate of data recovery, and improving the reliability of data storage and reading.
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