Magnetic Storage Pending Sector Reallocation via Media Fatigue Detection
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Solution Overview
Problem
Current storage space management techniques for magnetic storage devices do not effectively distinguish media fatigue-induced pending sector issues, leading to repeated sector failures and high pending sector counts, which significantly impact system performance by occupying resources and reducing bandwidth, increasing latency, and raising power consumption.
Innovation Solution
A method and system for identifying sectors subject to media fatigue by tracking read errors and reallocating these sectors to spare sectors, using a controller with components like an address mapper, comparator, and multiplexer to determine sector fatigue and perform forced reallocation, thereby reducing the number of pending sectors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If current storage space management techniques are used to track and manage pending sectors, then the system can maintain data integrity, but the pending sector count becomes high which occupies system resources and reduces performance
Solution Approach 1:
The patent segments the pending sector management problem by identifying and separating media fatigue-induced pending sectors from other types of pending sectors. The controller divides the sector population into groups based on their failure characteristics, allowing differential handling: media fatigue sectors are proactively reallocated while other pending sectors continue traditional tracking, thus reducing overall pending sector count and resource occupation.
Solution Approach 2:
The patent applies preliminary action by proactively reallocating sectors identified as suffering from media fatigue before they cause read errors. The controller detects media fatigue conditions and performs preventive reallocation to spare sectors, avoiding the formation of pending sectors in the first place. This preliminary intervention reduces the pending sector count and associated performance penalties.
2Reliability
If sectors subject to media fatigue are repeatedly tracked as pending sectors, then data integrity is maintained through monitoring, but system resources are continuously occupied and bandwidth is reduced
Solution Approach 1:
The patent segments sectors based on their failure mode characteristics, identifying media fatigue sectors through analysis of read error patterns and sector age. Once segmented, these sectors are handled differently from other pending sectors through proactive reallocation, reducing the continuous tracking burden and associated power consumption for sectors that are destined to fail anyway.
Solution Approach 2:
The patent applies discarding and recovering by proactively moving data from media fatigue sectors to healthy spare sectors before the fatigued sectors become completely unreliable. This recovers the data from impending failure while discarding the problematic sector from active service, reducing the need for continuous monitoring and power consumption associated with tracking doomed sectors.
3Ease of operation
If traditional pending sector management is used without distinguishing media fatigue sectors, then all sectors are treated uniformly, but media fatigue sectors repeatedly enter pending status causing high pending sector counts
Solution Approach 1:
The patent segments the sector population based on media fatigue characteristics by analyzing read error patterns, sector age, and failure modes. This segmentation enables the controller to identify sectors suffering from media fatigue and apply targeted reallocation strategies, improving sector stability for the problematic group while maintaining uniform management for other sectors.
Solution Approach 2:
The patent applies preliminary action by detecting media fatigue conditions and performing proactive reallocation before sectors repeatedly enter pending status. This preliminary intervention prevents the cyclic pending status transitions that plague traditional uniform management, improving sector stability while adding only targeted detection and reallocation steps for identified fatigue sectors.
Data Source
AI summary
System and method are disclosed for managing storage space of a magnetic storage device. The system may read data from a first sector of the storage space and determine whether the data are successfully read from the first sector. The system may write updated data to the first sector and a second sector when it is determined that the data are not successfully read from the first sector.