Hard Disk Spare Switching for Uninterrupted Data Processing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Data processing apparatuses face disruptions when a hard disk device fails, as they typically do not have a backup mechanism to continue data processing without suspending operations.
Innovation Solution
Incorporating spare storage means and control mechanisms that monitor the primary storage device's state, switching data storage to the spare device in case of failure, ensuring continuous operation by validating the operation of both storage means before switching, and notifying users and administrators of the issue.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single hard disk device is used for data storage, then the device complexity is reduced, but the reliability deteriorates when a trouble occurs in the storage means
Solution Approach 1:
The storage system is segmented into a first storage means (primary hard disk) and a spare storage means (backup hard disk), allowing the system to divide storage functions across multiple independent components. This segmentation enables failover capability where the spare storage means can take over if the first storage means fails, thus improving reliability without requiring a completely redundant complex system.
Solution Approach 2:
The spare storage means is prepared in advance as a standby unit before any failure occurs. The control means maintains monitoring capabilities ready to detect failures, and the spare storage means is pre-configured to assume the storage function immediately upon failure detection, eliminating the need for complex real-time failover decisions during actual failures.
2Reliability
If a spare storage means is added to the system, then the reliability is improved, but the device complexity increases
Solution Approach 1:
The control means integrates multiple functions into a single control unit: it monitors the state of the first storage means, manages the spare storage means, detects failures, executes switching operations, and performs validation checks. This merging of control functions into one centralized unit simplifies the overall system architecture compared to having separate control mechanisms for each function, thereby reducing the practical device complexity despite adding spare storage means.
Solution Approach 2:
The spare storage means is designed with multi-functionality: it serves as a backup storage unit, can be validated for operational readiness, and can assume the primary storage role when needed. The control means also performs multiple functions including monitoring, switching, and validation. This multi-functionality reduces the need for dedicated specialized components, thereby managing system complexity while maintaining high reliability.
3Reliability
If validation means is added to check storage means operation before switching, then the reliability is improved, but the device complexity increases
Solution Approach 1:
The validation means implements a feedback mechanism where the state of the spare storage means is continuously checked before and during the switching process. The control means receives feedback from the validation means about the operational status of storage units and uses this information to make informed switching decisions. This feedback loop ensures that only fully validated storage means are activated, improving reliability while keeping the validation process integrated within the existing control architecture.
Data Source
AI summary
Data processing can be performed even if a trouble occurs in a hard disk device. If a trouble occurs in a first hard disk device, it is recognized that a spare hard disk device is on standby, and operation of the spare device is checked. The first hard disk device is switched with the spare hard disk device, the data is processed and output. During this process, the first hard disk device is initialized. When the first hard disk device becomes available, the spare hard disk device is switched with the first hard disk device. If the first hard disk device is unavailable, an error is notified to an administrator to request repair or replacement.