Data Storage Device Backup Page Write Order
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Solution Overview
Problem
Data storage devices face challenges in preventing data loss due to sudden power-offs, particularly when writing data across multiple pages, as interference effects can lead to loss of least significant bit (LSB) data during power interruptions.
Innovation Solution
A data storage device method that writes data in target pages while minimizing interference effects by setting a specific write order and backing up special management data in a backup page within the same memory block, ensuring data integrity even during power failures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If data is written in multiple pages sequentially, then writing efficiency is improved, but data loss risk increases due to interference effects and sudden power-offs
Solution Approach 1:
The patent applies preliminary action by writing management data (such as LSB data) in advance to a first page before writing main data to subsequent pages. This ensures that critical management information is secured first, and if a power failure occurs during the writing process, the management data remains intact even if subsequent pages are corrupted. The processor selectively writes management data to a first page, then writes main data to second and third pages, preventing complete data loss.
Solution Approach 2:
The patent uses copying by creating a backup copy of management data in a separate page (first page) that is independent from the main data pages (second and third pages). This copy serves as a protective duplicate that can be used for recovery if the original data becomes corrupted or lost due to interference effects or power failures during the writing process.
2Manufacturing precision
If write order is optimized to minimize interference effects, then data integrity is improved, but writing time increases
Solution Approach 1:
The patent applies segmentation by dividing the data writing process into distinct segments with different priorities and protection levels. Management data (LSB) is segmented and written to a separate first page, while main data is segmented and written to second and third pages. This segmentation allows the system to optimize the write order for minimizing interference effects while maintaining acceptable writing performance through parallel or selective writing operations.
Solution Approach 2:
The patent applies local quality by applying different writing strategies to different parts of the data structure. Management data receives enhanced protection and is written with priority to pages that are less susceptible to interference effects, while main data uses standard writing procedures. This localized differentiation of quality and protection levels optimizes overall data integrity without uniformly increasing writing time for all data.
Data Source
AI summary
A data storage device includes a nonvolatile memory apparatus including a memory block including a plurality of pages; and a processor suitable for writing write data in target pages of the memory block, and backing up special management data of the write data in at least one backup page of the memory block.