Storage Rebuild Power Mode Switching for Error Detection
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Solution Overview
Problem
Current information processing systems face high power consumption and inability to detect errors during the rebuild process when operating in power saving mode, as the main control unit is not powered, and unnecessary power consumption occurs when returning to normal mode after successful rebuilds.
Innovation Solution
An information processing apparatus with a first and second control unit and a switching unit that allows the rebuild process to be executed in power saving mode, switching to normal mode if an error occurs, and re-executing the process if necessary, thereby reducing power consumption and enabling error detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the information processing apparatus operates in normal power mode during rebuild process, then the rebuild process can be executed with error detection capability, but power consumption increases significantly
Solution Approach 1:
The control unit is divided into two separate units: a first control unit that operates in normal power mode and a second control unit that operates in power saving mode. This segmentation allows the rebuild process to be executed in power saving mode while maintaining the ability to detect errors through the first control unit's periodic monitoring.
Solution Approach 2:
The first control unit acts as an intermediary that periodically wakes up from power saving mode to monitor the rebuild process status and detect errors. This mediator approach enables error detection without requiring the entire system to operate in high-power mode continuously.
2Reliability
If the information processing apparatus returns to normal power mode after each rebuild completion, then error detection is maintained, but unnecessary power consumption occurs when rebuild is successful
Solution Approach 1:
The power mode of the information processing apparatus is made dynamic based on the rebuild process status. The system transitions to normal power mode only when errors are detected during rebuild, and remains in power saving mode when rebuild completes successfully, optimizing power consumption while maintaining necessary error detection capability.
Solution Approach 2:
A feedback mechanism is implemented where the first control unit periodically checks the rebuild process status and provides feedback to determine whether to switch power modes. This feedback loop ensures that the system returns to normal power mode only when necessary (i.e., when errors are detected), avoiding unnecessary power consumption.
3Use of energy by moving object
If the supply of power to main control unit is stopped in power saving mode, then power consumption is reduced, but error detection during rebuild process becomes impossible
Solution Approach 1:
The control functionality is segmented into two separate control units: the first control unit that remains operational for error detection and the second control unit that executes the rebuild process. This segmentation allows power to be stopped from the main control unit during power saving mode while maintaining error detection capability through the first control unit.
Solution Approach 2:
The first control unit creates a simplified copy of the error detection functionality that can operate with minimal power consumption. This copied function allows the system to detect errors during rebuild process even when the main control unit is powered down in power saving mode.
Data Source
AI summary
An information processing apparatus has a first storage unit and a second storage unit and operates in one of a normal power mode and a power saving mode. When the information processing apparatus is operating in the power saving mode, if an error occurs in a storage process, the power mode of the information processing apparatus is switched to the normal power mode and the storage process is executed again. The storage process is a process in which when the first storage unit is replaced with a new storage unit, information equivalent to that stored in the first storage unit is stored in the new storage unit.