Storage Device Temperature Control Using Heat Load Accumulation
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Solution Overview
Problem
Data storage devices face challenges in efficiently managing operating temperatures, leading to increased cooling costs, reduced performance, and potential reliability issues due to the need for strict temperature control within limited operating ranges.
Innovation Solution
A method and temperature controller that set a threshold temperature, measure and accumulate temperature data over time to compare high and low temperature accumulation values, initiating cooling actions or performance adjustments to maintain optimal operating conditions, allowing the device to temporarily exceed threshold temperatures if historical heat loads are balanced.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If cooling arrangements such as fans are used to keep the storage device below the maximum operating temperature, then the operating temperature is controlled within safe limits, but the cost of the storage system increases and high amounts of electric power are consumed
Solution Approach 1:
The patent implements dynamic temperature control by continuously monitoring temperature at multiple points and adjusting cooling actions based on real-time conditions. The system dynamically determines when cooling is necessary by comparing accumulated high temperature measurements against accumulated low temperature measurements, enabling adaptive cooling that responds to actual thermal conditions rather than operating fans continuously or based on fixed thresholds alone.
Solution Approach 2:
The patent changes the parameter of temperature threshold evaluation by accumulating temperature measurements over time rather than using instantaneous readings. The system compares accumulated high temperature values with accumulated low temperature values, transforming the control parameter from static temperature thresholds to dynamic accumulated temperature profiles, which allows for more nuanced cooling decisions that consider historical thermal patterns.
2Temperature
If fans are used for cooling the storage device, then the operating temperature is reduced, but the fans get worn and produce noise
Solution Approach 1:
The patent implements periodic cooling action by determining cooling needs based on accumulated temperature data over time. Instead of continuous fan operation, the system periodically activates cooling when accumulated high temperature measurements indicate a need, allowing the system to cool the storage device in periodic cycles rather than continuous operation, thereby reducing wear on fan components.
Solution Approach 2:
The temperature monitoring and control system serves itself by automatically determining when cooling is necessary through comparison of accumulated temperature measurements. The system self-regulates fan operation based on internal thermal state assessment, eliminating the need for external control and enabling intelligent, wear-reducing cooling decisions.
3Temperature
If the workload on the storage device is reduced to lower operating temperature, then the operating temperature goes down, but the performance of the storage device decreases
Solution Approach 1:
The patent enables dynamic workload management by continuously monitoring temperature and comparing accumulated high and low temperature measurements. The system dynamically adjusts workload or cooling actions based on real-time thermal conditions, allowing the storage device to operate at high performance when temperatures are acceptable and only reducing workload or activating cooling when accumulated temperature data indicates a need, thereby minimizing performance impact.
Solution Approach 2:
The system implements feedback control by continuously measuring temperature at multiple points, accumulating high and low temperature measurements, and using this feedback to determine when cooling or workload adjustment is necessary. This closed-loop feedback mechanism ensures that performance is maintained at maximum levels unless thermal conditions warrant intervention.
4Reliability
If strict temperature control is maintained to ensure reliable operation, then the MTBF is ensured, but more cooling arrangements and redundant storage capacity are required
Solution Approach 1:
The patent implements dynamic reliability management by continuously monitoring temperature and comparing accumulated high and low temperature measurements over time. The system adaptively determines when cooling intervention is necessary to maintain reliable operation, allowing the storage device to operate closer to temperature limits when conditions permit while ensuring MTBF requirements are met through intelligent, condition-based cooling control rather than conservative fixed thresholds.
Solution Approach 2:
The patent transforms the reliability control parameter from static temperature thresholds to dynamic accumulated temperature profiles. By comparing accumulated high temperature values against accumulated low temperature values, the system uses changed parameters to make more precise reliability decisions, reducing the need for excessive cooling capacity while maintaining MTBF requirements.
Data Source
AI summary
A method of controlling an operating temperature of a data storage device is disclosed. A threshold temperature for the storage device is set. Over time, during operation of the data storage device, an operating temperature of the storage device is measured at a plurality of points in time. A plurality of temperature measurements as a function of time are thereby obtained. Above threshold temperature measurements are accumulated over time to form a high temperature accumulation value (Vhigh), and below threshold temperature measurements are accumulated to form a low temperature accumulation value (Vlow). The low temperature accumulation value (Vlow) and the high temperature accumulation value (Vhigh) are compared. If an outcome of the comparison is that the high temperature accumulation value (Vhigh) is too high in relation to the low temperature accumulation value (Vlow), an operating temperature lowering action is initiated.