Hierarchial Hybrid Solid State Drive

With the constant demand for better storage, various storage class memory (SCM) technologies have emerged as a promising replacement for traditional NAND flash storages, offering higher speeds and reliability. However, current SCMs have lower densities when compared to NAND flash memories. Thus, hybrid solid-state-drive is proposed to capitalize on the strengths of each memory type. This paper explores the design of such a device and the control algorithms used, and the effects of various algorithms on the performance of this device under various workloads.