A Prototype of Power Saving Storage Method RAPoSDA

Because of the development of information technologies and the pervasiveness of cloud services, Reducing power consumption in large scale storage systems becomes a very important issue. Recently, we have proposed a method to solve the problem called Replica Assisted Power Saving Disk Array (RAPoSDA) and verified its effectiveness. RAPoSDA utilizes a primary backup configuration on both cache memories and disk drives to ensure system reliability and it dynamically controls the timing and targeting of disk access based on individual disk rotation states. Until now, we have evaluated the effectiveness of RAPoSDA by using simulation program which we had developed. The evaluation shows that RAPoSDA achieves significantly reducing power consumption. However, we have not evaluated it effectiveness on the practical environment. In this paper, we introduce the prototype system of RAPoSDA to evaluate the power saving capability of RAPoSDA.