Prioritized RAID Rebuild Balancing Storage Device Loads

The patent applies local quality by assigning different priorities to different storage devices during the rebuild process. Specifically, it identifies storage devices with lower current I/O loads and prioritizes them for rebuild operations, while allowing devices with higher loads to maintain their normal operations. This differential treatment based on local conditions (individual device load states) resolves the contradiction by preventing bottlenecks on overloaded devices while充分利用 the capacity of underutilized devices, thereby reducing overall rebuild duration without compromising data reliability.

The patent implements local quality by making rebuild operations adaptive to the current load conditions of individual storage devices. It continuously monitors I/O loads on remaining storage devices and dynamically selects which devices should perform rebuild operations based on their capacity to handle additional work. This ensures that rebuild operations are distributed to devices with available capacity, preventing performance degradation on bottleneck devices while maintaining overall system resiliency through progressive recovery.

The patent employs feedback by continuously monitoring the I/O loads on storage devices and using this information to dynamically adjust rebuild priorities. The system determines the current load state of each storage device, feeds this information back into the priority assignment logic, and adjusts which devices perform rebuild operations accordingly. This feedback mechanism enables automatic load balancing without requiring complex manual configuration, as the system self-adjusts based on real-time conditions, thereby improving performance while keeping the control mechanism manageable.