Storage System Anomaly Detection via Redundancy Assessment
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Solution Overview
Problem
Existing storage systems face challenges in accurately determining the anomaly-occurring portion during errors without reproducibility, leading to potential unnecessary disconnection of transmission paths or storage apparatuses, which affects system continuity and precision in anomaly determination.
Innovation Solution
A storage system with a controller that determines data redundancy and uses error history to differentiate between storage apparatus and transmission path anomalies, allowing continued operation without disconnecting non-anomalous components, thereby improving determination precision and system continuity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the system determines anomaly-occurring portion by disconnecting storage apparatuses or transmission paths when errors occur, then the precision of anomaly determination may improve, but the system continuity and reliability deteriorate due to unnecessary disconnections
Solution Approach 1:
The patent segments the anomaly determination process into distinct phases: initial error detection, redundancy status assessment, and conditional determination. By dividing the determination logic based on redundancy status (whether redundant copies exist), the system avoids premature disconnections while maintaining determination precision through structured decision-making
Solution Approach 2:
The system performs preliminary assessment of redundancy status before making anomaly determination decisions. By checking whether redundant data copies exist beforehand, the system can safely defer determination when redundancy is available, preventing unnecessary disconnections while preserving the ability to determine anomalies accurately when needed
2Reliability
If the system continues operation despite errors without reproducibility, then the system continuity is maintained, but the determination criterion of anomaly-occurring portion becomes less stringent and determination precision deteriorates
Solution Approach 1:
The patent implements dynamic determination criteria that adapt based on system state. When redundancy is available, the system maintains loose criteria to ensure continuity. When redundancy is lost, the system dynamically tightens criteria to improve determination precision, allowing the determination stringency to flex according to operational context
Solution Approach 2:
The system changes the determination parameter (redundancy status) to control determination precision. By monitoring whether redundant copies exist, the system adjusts its anomaly determination behavior: maintaining operation with deferred determination when redundancy exists, and enabling precise determination when redundancy is lost
Data Source
AI summary
In a storage system, when a recovered error occurred upon access to a storage apparatus, a data redundancy determination unit determines whether data to be accessed has redundancy. When the data is determined to have no redundancy, an anomaly-occurring portion determination unit determines that the storage apparatus is not an anomaly-occurring portion and at the same time, an error history determination unit determines whether a recovered error occurred at the time of the past access to the storage apparatus other than that of the access destination. The anomaly-occurring portion determination unit determines whether a common transmission path is the anomaly-occurring portion based on the determination result of the error history determination unit.