Adaptive Memory Scans for NAND Wear and QoS Balance

The patent applies dynamics by transitioning from static scan parameters to dynamic, adaptive scan parameters that change based on the memory device's age and wear level. The scan management component continuously adjusts scan frequency and data state metric thresholds based on program erase cycle counts and performance metrics, allowing the system to optimize between data integrity and performance at different stages of the device lifecycle.

The patent implements parameter changes by modifying scan frequency and data state metric thresholds based on the number of program erase cycles and measured performance metrics. Lookup tables store different parameter sets that are selected based on the device's wear level, enabling the system to use stricter parameters when needed and more relaxed parameters when performance is prioritized.

The patent applies partial or excessive action by performing scans at varying frequencies rather than consistently at maximum frequency. When the memory device is new and reliable, scans are performed less frequently (partial action). As the device ages and wear increases, scan frequency increases (excessive action) to ensure data integrity, thus optimizing the balance between reliability and performance overhead.

The patent implements feedback by continuously monitoring performance metrics and program erase cycle counts, then using this information to adjust scan frequency and data state metric thresholds. The scan management component receives feedback about device wear and performance, and dynamically modifies scanning behavior accordingly, reducing unnecessary scans when the device is healthy and increasing scans when wear is detected.