RAID Reconstruction Using Distributed Hot Spare Writing

The patent segments the single hot spare disk into multiple hot spare disks, distributing the data writing task across multiple targets. Instead of consolidating all reconstructed data into one disk, the system divides the data strips and assigns them to different hot spare disks, thereby parallelizing the writing process and eliminating the single-point bottleneck that limited reconstruction speed.

The patent transitions from a single-disk reconstruction target to a multi-disk target architecture. By adding the dimension of multiple hot spare disks, the system expands the writing capacity from a single bottleneck to a distributed parallel system, enabling simultaneous writing operations across multiple disks and significantly improving overall reconstruction throughput.

The patent applies segmentation by dividing the hot spare disk resources into multiple independent hot spare disks. Each hot spare disk can independently receive and write data strips, creating parallel writing channels. This segmentation transforms the single-disk architecture into a multi-disk system that achieves higher aggregate writing speed while maintaining manageable complexity through modular organization.

The patent makes the hot spare disk system multi-functional by enabling multiple disks to perform the same reconstruction writing function simultaneously. Instead of one disk handling all reconstruction tasks sequentially, multiple hot spare disks can work in parallel, each handling different data strips, thereby universalizing the reconstruction capability across the disk subsystem.