Data Storage Device Low Voltage Detection Interval Management
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Solution Overview
Problem
Data storage devices face instability and frequent resets due to frequent generation of low voltages, leading to a bottleneck phenomenon in the entire system.
Innovation Solution
A data storage device with a nonvolatile memory device and a power management unit that outputs low voltage detection signals, allowing a processor to compute detection intervals and determine whether to perform a recovery operation independently or based on host device instructions, thereby preventing frequent resets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the data storage device performs a recovery operation every time a low voltage detection signal is received, then the device can maintain data integrity, but the frequent resets cause a bottleneck phenomenon in the entire system
Solution Approach 1:
The processor monitors the detection interval between consecutive low voltage detection signals and uses this feedback to dynamically adjust the recovery operation strategy. When the detection interval exceeds a threshold, indicating infrequent low voltage events, the device performs recovery operations. When the detection interval is below the threshold, indicating frequent low voltage events, the device suppresses recovery operations to prevent system bottlenecks.
Solution Approach 2:
The system changes the operational parameter (recovery operation execution) based on the detected parameter (detection interval). By computing the time interval between low voltage detection signals and comparing it to a threshold, the system dynamically adjusts whether to perform recovery operations, transitioning between two operational states based on the measured parameter.
2Productivity
If the data storage device suppresses recovery operations to prevent bottlenecks, then system throughput is maintained, but data integrity may be compromised during frequent low voltage events
Solution Approach 1:
Instead of performing recovery operations in all low voltage scenarios (excessive action), the system applies partial action by selectively executing recovery operations only when the detection interval exceeds the threshold. This partial approach maintains system throughput while providing sufficient data protection for the majority of cases where low voltage events are not excessively frequent.
Data Source
AI summary
A data storage device includes a nonvolatile memory device; a power management unit suitable for outputting first and second low voltage detection signals, each low voltage detection signal representing a voltage level of a source voltage equal to or lower than a predetermined reference voltage level; and a processor suitable for computing a detection interval between the first low voltage detection signal and the second low voltage detection signal before the first low voltage detection signal, comparing the computed detection interval and a predetermined threshold detection interval, and determining a subject to manage performing of a recovery operation according to low voltage generation based on a comparison result.