Storage Disk Wear Prediction and Data Migration
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Solution Overview
Problem
In RAID-based storage systems, simultaneous failure of multiple storage disks can lead to data loss due to uneven wear and lack of effective redundancy, posing significant data risks.
Innovation Solution
A method that determines the expected usage time of storage disks and migrates data from disks with shorter remaining life to others, replacing them within the RAID configuration to prevent simultaneous failures and enhance system stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data is stored on multiple storage disks in a RAID system, then data redundancy and recovery capability are improved, but the risk of simultaneous disk failure increases due to uneven wear
Solution Approach 1:
The patent applies preliminary action by predicting disk failure based on usage time and proactively migrating data before the disk actually fails. The system determines expected usage time of storage disks and migrates data from disks with shorter remaining life to other disks, preventing simultaneous failures and ensuring continuous data availability.
2Device complexity
If storage disks are used continuously without migration, then system simplicity is maintained, but disk wear becomes uneven and failure risk increases
Solution Approach 1:
The patent implements feedback by continuously monitoring disk usage time and based on this information, dynamically adjusting data migration strategies. The system determines expected usage time of storage disks and uses this feedback to decide when to migrate data, achieving uniform wear distribution while maintaining manageable system complexity.
Data Source
AI summary
Techniques for storage management involve: determining expected usage time of a first storage disk in a set of storage disks, at least a part of the set of storage disks being configured to form at least one redundant array of independent disks (RAID); moving data in a first storage block, associated with a first RAID in the at least one RAID, in the first storage disk to a second storage block in a second storage disk in the set of storage disks based on a determination that the expected usage time is less than a predetermined threshold value; and replacing the first storage block with the second storage block, so that the second storage block is associated with the first RAID. Based on this manner, the stability of a storage system can be improved.