An Efficient Address Mapping Algorithm for Multichannel Structure SSD

In allusion to the problem that traditional flash translation layer cannot meet the requirement of the multichannel structure Solid-State Drive, considering the four-level parallelism existed in it, a region-based page level address mapping algorithm is proposed. The algorithm assigns continuous logical pages to different channels and divides the logical address into three different levels including region, block and page. The logical page can be mapped to the physical page using this three-level mapping algorithm, which can guarantee performance and reduce memory usage. To evaluate the proposed algorithm, we use the SSD simulator, and experimental and analytical results show that the algorithm can release memory space of SSD, lessen the page waste, prolong the life-span and improve the performance of the SSD.