Storage Failover with Adaptive RAID Redundancy
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Solution Overview
Problem
Small-scale users with low-capacity storage media cannot configure a failover system due to storage capacity dependencies, leading to uneconomical and low-use efficiency in storage media utilization.
Innovation Solution
A storage system that sets the RAID level of secondary storage media to a lower redundancy level than the primary media if its capacity is smaller, allowing configuration of a failover system by storing user data from the primary media to the secondary media, and includes a mechanism to stop the RAID scheme if free space is sufficient.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the storage capacity of the second storage media is smaller than the first storage media, then the backup NAS cannot be configured in traditional failover systems, but this invention enables failover configuration by setting lower RAID level
Solution Approach 1:
The invention changes the RAID level parameter of the second storage media based on its storage capacity. When the second storage media has smaller capacity than the first storage media, the system sets the RAID level to a lower level (e.g., RAID 0 or RAID 1 instead of RAID 5 or RAID 6), thereby adjusting the redundancy parameter to match the available storage space and enabling failover configuration.
2Reliability
If RAID level with high redundancy is set for second storage media, then data protection is improved, but available storage space for user data decreases
Solution Approach 1:
The system dynamically adjusts the RAID level parameter based on the storage capacity of the second storage media. By selecting appropriate RAID levels (RAID 0, RAID 1, RAID 5, or RAID 6), the system optimizes the balance between data protection redundancy and available storage space for user data, ensuring maximum utilization of limited storage resources.
Data Source
AI summary
A storage system is capable of configuring a failover system by use of a first storage processing device to which first storage media are connected and a second storage processing device to which second storage media are connected. The storage system sets the RAID level of the second storage media to a RAID level with lower redundancy than the RAID level of the first storage media, if the storage capacity of the second storage media is smaller than the storage capacity of the first storage media.