一种硬盘动态电源管理方法

在便携式系统中,硬盘能耗约占整个系统能耗的20%.为降低系统能耗,提高系统使用时间,提出了一种硬盘动态电源管理方法:通过读写硬盘寄存器来实现硬盘状态的转换,读取内核相关结构以获取硬盘负载,设计并实现高性能的动态电源管理策略优化算法.实验结果表明,对硬盘进行动态电源管理,能显著降低便携式系统的能耗,证明文中提出的方法是可行的.

A Method of Dynamic Power Management for Hard Disk

Along with the wider use of battery-powered equipment in embedded systems, due to the low capacity of battery, power management is essential to reduce power consumption, and thus extend the sustainable use span. In embedded systems, especially mobile devices (e.g. laptops), hard disk consumes a large proportion of power. The paper introduces a design and implementation of dynamic power management (DPM) on hard disk, including the conversion of hard disk states, load acquisition, a design and implementation of policy optimization algorithms, and finally an experiment is performed on a specific hard disk, implementing dynamic power management based on different DPM policy optimization algorithms. The results are consistent with the expectations, and achieve the purpose of saving energy-consumption on hard disk, which as a result proves the feasibility of the dynamic power management implementation introduced in the paper.