Alignment Zone Data Shifting for Sector Boundary Optimization
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Solution Overview
Problem
Data storage devices experience performance degradation due to misaligned write commands with sector boundaries, leading to increased read-modify-write operations, which reduce efficiency.
Innovation Solution
The implementation of alignment zones with data and pad chunks in non-volatile memory, allowing for shifting of data chunks to align with changing offsets, while maintaining a copy of the data chunks for data protection during shifts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If data chunks are shifted to align with sector boundaries, then write command alignment is improved, but data protection during shifting becomes more complex
Solution Approach 1:
The storage device divides memory into alignment zones containing data chunks and pad chunks. This segmentation allows independent shifting of data chunks within the alignment zone while pad chunks provide buffer space for safe data relocation, resolving the contradiction between alignment efficiency and data protection complexity.
Solution Approach 2:
Pad chunks act as intermediary buffer zones during data chunk shifting operations. These pad chunks temporarily hold data during transitions, enabling safe alignment adjustments without risking data loss, thus simplifying the data protection mechanism while maintaining alignment efficiency.
2Adaptability or versatility
If alignment zones are implemented with pad chunks, then adaptability to offset changes is improved, but memory structure complexity increases
Solution Approach 1:
The alignment zone structure allows dynamic shifting of data chunks relative to pad chunks based on changing offset requirements. This dynamic reconfiguration enables the memory structure to adapt to different offset changes while maintaining a relatively simple underlying memory organization, resolving the contradiction between adaptability and structural complexity.
3Productivity
If read-modify-write operations are reduced through alignment, then performance is improved, but alignment maintenance overhead increases
Solution Approach 1:
The system performs preliminary alignment by organizing data chunks and pad chunks in advance within alignment zones. This preliminary structuring allows write commands to naturally align with sector boundaries during normal operation, reducing the need for read-modify-write operations while minimizing ongoing alignment maintenance overhead.
Data Source
AI summary
A data storage device is disclosed comprising a non-volatile memory comprising a plurality of sectors. At least one alignment zone is defined in the non-volatile memory comprising a plurality of chunks including a plurality of data chunks and a plurality of pad chunks, wherein each chunk comprises a plurality of sectors. Each sector is operable to store X host blocks, the alignment zone comprises at least X−1 pad chunks, and control circuitry is operable to shift the data chunks of the alignment zone by a number of chunks equal to or less than X−1 plus a corresponding offset.