Journal of South China University of Technology (Natural Science Edition) ›› 2010, Vol. 38 ›› Issue (1): 97-101.doi: 10.3969/j.issn.1000-565X.2010.01.019

• Computer Science & Technology • Previous Articles     Next Articles

A Method of Dynamic Power Management for Hard Disk

Liu Fa-gui  Wu Ze-xiang  Mai Wei-peng   

  1. School of Computer Science and Engineering, South China University of Technology, Guangzhou 510006, Guangdong, China
  • Received:2008-09-08 Revised:2009-09-11 Online:2010-01-25 Published:2010-01-25
  • Contact: 刘发贵（1963-），女，博士，教授，主要从事操作系统与嵌入式软件等研究． E-mail:fgliu@scut．edu．cn
  • About author:刘发贵（1963-），女，博士，教授，主要从事操作系统与嵌入式软件等研究．
  • Supported by:

    粤港关键领域重点突破项目（2007A010101003）;广东省-育部产学研结合项目（20078090200018）

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Abstract:

Hard disk consumes about 20% of power of a portable system. In order to reduce the power consumption and prolong the service time of portable systems, a method of dynamic power management for hard disk, including the hard-disk state conversion by reading and writing hard disk registers, the load acquisition by reading interrelated kernel structures, and the design and implementation of high-performance policy optimization algorithms, is devised. Experimental results indicate that the dynamic power management of hard disk helps to significantly reduce the power consumption of portable systems, and that the proposed management method is feasible.

Key words: hard disk, state conversion, load acquisition, dynamic power management