Dynamic Buffer Memory Allocation for Flash Storage

The patent applies dynamics by making the buffer memory area allocation movable and adjustable. The data area and map area boundaries are no longer fixed but can be dynamically shifted based on read operation modes. When sequential read is detected, the data area expands; when random read is detected, the map area expands. This dynamic allocation resolves the contradiction by allowing the structure to adapt to different operational requirements, thereby maintaining structural simplicity while improving storage efficiency and map hit ratio.

The patent applies parameter changes by modifying the allocation parameters of the buffer memory areas based on operational conditions. Instead of increasing the total buffer memory capacity, the system changes the distribution parameters of existing capacity between data area and map area. The controller adjusts area sizes by comparing read operation modes (sequential vs. random) and reallocating buffer space accordingly. This resolves the contradiction by achieving better storage capacity utilization through parameter optimization rather than capacity expansion, thereby avoiding increased device complexity and cost.

The patent applies dynamics by making the map area size variable and adjustable based on operational requirements. Instead of maintaining a fixed map area size, the system dynamically expands the map area when random read operations are detected to improve address mapping efficiency and map hit ratio. Conversely, during sequential read operations, the map area is reduced to allow larger data area for maximum storage capacity. This dynamic adjustment resolves the contradiction by allowing address mapping efficiency to be optimized when needed without permanently sacrificing data storage capacity.