Hybrid SSD Controller Data Segmentation for Latency Optimization

The patent segments the storage system into multiple independent dies (e.g., die 0, die 1, die 2, die 3) that can be accessed in parallel. The mapping mechanism distributes logical blocks across different dies rather than concentrating them on a single die, enabling concurrent read/write operations on multiple channels simultaneously. This segmentation eliminates the bottleneck where multiple requests would queue for the same die, thereby maintaining high speed while improving quality of service through parallel processing.

The patent implements a universal mapping mechanism that functions across all channels and dies in a standardized manner. The same mapping logic and data structure format are applied uniformly regardless of which channel or die is accessed, allowing the system to exploit parallelism without requiring complex, specialized handling for each individual channel. This multi-functional approach enables efficient parallel operations while keeping the control logic relatively simple and reusable across different parts of the system.

The patent segments data into two categories: latency-critical data and non-latency-critical data. Storage class memory is allocated specifically for latency-critical data that requires fast access, while NAND flash is used for non-latency-critical data. The mapping mechanism automatically routes data to the appropriate storage medium based on its latency requirements, ensuring high quality of service for time-sensitive operations while maintaining cost-effective storage for less time-sensitive data. This segmentation approach manages manufacturing complexity by clearly defining separate roles for each storage component.