| Summary: | 碩士 === 國立臺灣科技大學 === 電子工程系 === 105 === In recent years, the development of solid-state drives (SSDs) is mature because the read and write speed, volume, shock resistance and power consumption are better than hard-disk drives (HDDs). However, the current shortcoming of SSDs is the price that is more expensive than HDDs. In order to reduce the cost of SSDs, DRAM-less SSDs have been proposed. If DRAM in SSDs was removed, it can achieve cost savings and cut the price of each SSD. However, DRAM was originally used in SSDs as data cache or mapping cache, the performance of SSDs without DRAM could be greatly reduced. Therefore, the concept of host memory buffer was proposed by reserving memory buffer in the host side to provide DRAM capacity for DRAM-less SSDs to improve the performance. In the thesis, we propose an adaptive host memory buffer design for DRAM-less Flash Memory. Based on the proposed method, the data buffer and mapping buffer can be adjusted effectively and dynamically. We can also increase the hit rate of the data buffer and mapping buffer, and increase the SSD performance.
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