Storage class memory based SSD performance in consideration of error correction capabilities and write/read latencies

The future storage class memory (SCM) can be comparable with NAND flash in terms of cost, and with DRAM from the perspective of speed. There are 3 primary memory technology candidates that match the target requirements for SCM: ReRAM, PCM, and MRAM. The future SCM-based solid state drive (SSD) shows advantages of high performance and low power consumption compared with NAND flash SSD. In this paper, SCM-only SSD performance with different SCM write/read latencies is analyzed for two workloads (write/read intensive). Next, impact of error-correcting code (ECC) capabilities on the SSD performance is also analyzed to consider the SSD reliability. Finally, the trade-off and the optimal relation of ECC capabilities and SCM latencies are analyzed to achieve the high-performance SCM-based SSD.