Memory Media Scan Rate Control Using Temperature Profile Tracking
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Solution Overview
Problem
Existing memory systems fail to manage data integrity scans effectively due to reliance on fixed time intervals, which do not account for temperature variations, leading to potential data loss and memory failures.
Innovation Solution
Implementing a temperature monitoring system that adjusts the frequency of media scans based on a moving average temperature, using sensors to collect data and a controller to determine the appropriate scan frequency, thereby addressing temperature-induced data degradation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fixed time intervals are used for data integrity scans, then the scan process is simple to implement, but data loss and memory failures occur due to temperature variations not being accounted for
Solution Approach 1:
The patent implements dynamic adjustment of scan frequency based on real-time temperature monitoring. The controller modifies the time intervals between scans according to temperature conditions, transitioning from fixed to variable intervals. This resolves the contradiction by making the scan mechanism adaptive to environmental conditions while maintaining reliability.
Solution Approach 2:
The system incorporates temperature sensing and feedback loops where scan frequency is continuously adjusted based on temperature readings. The controller receives temperature feedback and modifies scan intervals accordingly, creating a closed-loop control system that enhances data integrity while managing complexity through intelligent adaptation.
2Reliability
If scan frequency is increased to prevent data loss, then data integrity improves, but energy consumption and system complexity increase
Solution Approach 1:
The patent applies dynamic scan frequency adjustment where the controller increases scan rates only when temperature conditions indicate risk of data degradation. During stable, low-risk periods, scan frequency is reduced. This dynamic approach maintains data retention reliability while optimizing energy consumption by avoiding unnecessary scans during stable conditions.
Solution Approach 2:
The system changes the temporal parameter (scan interval) based on temperature conditions. Rather than maintaining a constant high scan frequency, the system adjusts the time parameter dynamically, extending intervals during stable conditions and shortening them during risky temperature conditions, thereby balancing reliability and energy efficiency.
3Reliability
If temperature monitoring is implemented to adjust scan frequency, then data integrity improves, but device complexity increases
Solution Approach 1:
The patent introduces temperature sensors as intermediary components that bridge environmental conditions and scan control. These sensors provide temperature data to the controller, which then adjusts scan frequency accordingly. The intermediary sensing mechanism enables adaptive integrity monitoring while managing complexity through modular, standardized temperature sensing components.
Data Source
AI summary
Systems, methods, and apparatus related to controlling media scan in memory devices. In one approach, a controller manages a media scanning process for a memory (e.g., NAND flash memory) as a function of temperature. The controller collects temperature data from one or more sensors of the memory. Using the collected temperature data, the controller determines a moving average temperature. Based on the moving average temperature, the controller updates a frequency of the media scanning process.