Memory Controller Sequence Tracking for Storage Failure Analysis
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Solution Overview
Problem
Current storage devices lack advanced capabilities for operation pattern analysis and failure analysis, which are essential for optimizing performance and reliability.
Innovation Solution
A storage device with a memory controller that generates sequence information for storing data, including a physical address and sequence number, to track the sequential order of program operations, and stores this information alongside the data, enabling detailed analysis of operation patterns and potential failures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sequence information and history information are stored in the memory device, then operation pattern analysis and failure analysis capabilities are improved, but the device complexity and storage space requirements increase
Solution Approach 1:
The memory page is divided into two distinct areas: a first area for storing user data and a second area for storing history information. This segmentation allows the controller to track operation sequences without requiring a separate logging structure, thereby improving reliability while managing device complexity through spatial organization.
Solution Approach 2:
The second area of each page serves multiple functions: it stores history information including physical addresses and sequence numbers, enabling both operation pattern analysis and failure analysis. This multi-functionality improves reliability without proportionally increasing device complexity.
2Reliability
If sequence information is generated and stored for each program operation, then operation pattern analysis capability is improved, but the manufacturing complexity and storage overhead increase
Solution Approach 1:
The controller generates sequence information at the time of each program operation, preliminarily recording the operational sequence before any potential failure occurs. This preliminary action enables subsequent operation pattern analysis without requiring complex post-processing or external logging mechanisms, thus improving reliability while maintaining ease of manufacture.
Solution Approach 2:
The memory device performs self-monitoring by automatically generating and storing sequence information and history information about its own operations. This self-service capability improves operation pattern analysis capability without requiring external monitoring systems, thereby maintaining ease of manufacture.
3Reliability
If history information including physical address and sequence number is stored, then failure analysis capability is improved, but the storage space consumption increases
Solution Approach 1:
History information is stored locally within the second area of each specific page rather than in a centralized logging structure. This local quality approach ensures that failure analysis can be performed on a per-page basis, improving targeted failure analysis capability while minimizing overall storage space consumption by only recording necessary information where it is needed.
Solution Approach 2:
The system stores partial history information (physical address and sequence number) rather than complete operational details. This partial action approach provides sufficient data for failure analysis while avoiding excessive storage space consumption that would result from recording all operational parameters.
Data Source
AI summary
A memory controller for controlling a memory device including a plurality of pages is provided. The memory controller comprises: an input data controller configured to receive data to be stored in a page selected from among the plurality of pages; a sequence information generator configured to generate sequence information indicating a sequential order of a program operation of storing the data in the first page based on sequential orders of program operations performed before the program operation; and a write operation controller configured to control the memory device to store the data in a first area of the first page and to store history information in a second area of the first page, wherein the history information includes a physical address of the first page and the sequence information corresponding to the data.