Nonvolatile Memory Controller Wear Equalization
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Solution Overview
Problem
Data storage devices face challenges in evenly utilizing memory areas and preventing degradation due to continuous storage of similar data patterns, leading to uneven wear and tear.
Innovation Solution
A data storage device with a nonvolatile memory apparatus and a controller that randomizes write data using a seed selected based on an offset value and flag corresponding to the target memory area, ensuring even usage and preventing degradation by generating random write data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If data is continuously stored in the same memory area, then data storage efficiency is improved, but memory degradation increases due to uneven wear and tear
Solution Approach 1:
The patent applies dynamics by making the data storage pattern changeable over time. The controller dynamically adjusts the storage location of sequential data based on wear information of memory areas, transitioning from static to dynamic storage strategies. This resolves the contradiction by allowing continuous storage efficiency while preventing localized degradation through adaptive relocation.
Solution Approach 2:
The patent changes the parameter of storage location based on memory area wear characteristics. By monitoring wear information and adjusting storage positions accordingly, the system transforms a fixed storage pattern into a variable one that adapts to memory conditions, thereby maintaining both storage efficiency and reliability.
2Speed
If sequential data is stored in the same memory area, then write operation speed is improved, but wear uniformity deteriorates leading to reduced device lifespan
Solution Approach 1:
The system dynamically adjusts storage locations based on wear information to balance write speed with uniform wear distribution. The controller monitors which memory areas are experiencing higher wear and relocates sequential data storage to less worn areas, maintaining fast writes while extending device lifespan through balanced wear distribution.
Solution Approach 2:
The patent implements feedback by monitoring wear information from memory areas and using this information to guide future write operations. The controller receives wear data, processes it to determine optimal storage locations, and adjusts subsequent write operations accordingly, creating a closed-loop system that balances speed and durability.
Data Source
AI summary
A data storage device includes a nonvolatile memory apparatus including a plurality of memory areas, and a controller configured to randomize write data and generate random write data based on an offset value of a target memory area of the memory areas and a flag corresponding to the target memory area.