Power Modeling of Solid State Disk for Dynamic Power Management Policy Design in Embedded Systems

Power consumption now becomes the most critical performance limiting factor to solid state disk (SSD) in embedded systems. It is imperative to devise design methods and architectures for power efficient SSD designs. In our work, we present the first step towards low power SSD design, i.e., power estimation of SSD. We present a practical approach of SSD power estimation which tries to keep the advantage of real measurement, i.e., accuracy, while overcoming its limitations, i.e., long execution time and lack of repeatability (and high cost) by a trace-based simulation. Since it is based on real measurements, it takes into account the power consumption of SSD controller as well as that of Flash memories. We show the effectiveness of the presented method in designing a dynamic power management policy for SSD.