STORAGE ADDRESS SPACE TO NVM ADDRESS, SPAN, AND LENGTH MAPPING/CONVERTING

摘要

NVM address, range, and length mapping/translation of the storage address space is performed by the controller for the solid-state storage system, which includes a mapping function to translate logical block addresses from the host to addresses of the NVM's smallest read unit. do. The mapping function provides range and length information corresponding to the logical block address. The range information specifies the number of adjacent minimum read units to read to provide data (corresponding to a logical block address) to the host. The length information specifies how many contiguous minimum read units relate to the data provided to the host. The translated address and length information is available to improve the recycling of parts that are no longer needed (e.g., released) of the NVM, and facilitates recovery from outages and/or unintended service outages. Available to do.