Write Buffer Management for Dynamic Storage Capacity

The patent implements a write buffer management system where write buffers can serve multiple logical units dynamically. When a first LU exhausts its dedicated write buffer space, the controller allocates write buffer resources from a second LU (which has available space) to the first LU, enabling the write buffer to function universally for multiple LUs rather than being strictly dedicated to one LU. This resolves the contradiction by maintaining high write throughput while improving overall memory resource utilization.

The patent employs dynamic write buffer allocation where the controller continuously monitors the utilization status of write buffers across multiple logical units. When a LU needs additional storage capacity, the controller dynamically reallocates write buffer resources from underutilized LUs, and can restore these resources when originally needed. This dynamic approach ensures that storage capacity is expanded when needed while preserving write throughput by restoring buffers when LUs require them for boosted write operations.

The patent implements a self-managing write buffer system where the controller automatically monitors write buffer utilization across logical units and performs reallocation without external intervention. The controller identifies underutilized write buffers and reallocates them to LUs that need additional capacity, and can restore resources when originally needed. This self-service mechanism reduces the need for complex external management while maintaining high write speeds through efficient resource utilization.