Abstract: Hard disk drives have been one of important components of modern-day storage systems, and their power consumption is the major part of total power consumption of storage systems. I}herefore, the problems of high power dissipation of disk-based storage systems are paid much more attentions by researchers. The research progress and sta- tus on power consumption issues from disk to storage system were extensively studied in this paper. Then representative power-saving technologies, implementation mechanisms as well as evaluation methodologies were presented and discussed in details. Further, their respective characteristics and applicability were also analyzed and summarized. I3y taking workload characteristics of mass storage systems and complexity of application scenarios into consideration, the future work on power-saving technologies for disk-based storage systems was pointed out finally.

Key words: Disk-based storage systems, RAID, Power-saving technologies, Power measurement