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http://dx.doi.org/10.9708/jksci.2011.16.10.023

I/O Scheme of Hybrid Hard Disk Drive for Low Power Consumption and Effective Response Time  

Kim, Jeong-Won (Dept. of Computer Science, Silla University)
Publication Information
Journal of the Korea Society of Computer and Information / v.16, no.10, 2011 , pp. 23-31 More about this Journal
Abstract
Recently, Solid state disk is mainly used because this device has lower power consumption as well as higher response time. But it features higher price and lower performance at delete and write operations compared with HDD. To compensate this defect, Hybrid hard disk with internal non-volatile flash memory was issued. This NVCache is used as a kind of cache for disk blocks. In this paper, an I/O scheme for H-HDD is proposed for improving low power consumption as well as response time. Our method is to use this NVCache as read cache mainly and write cache when write requests are concentrated. In read cache operation, disk blocks with higher priority determined on basis of time as well as spatial localities are prefetched, which can improve response time. The write operation is conducted only at write peak time as disk spindle up costs higher battery power as well as response time. Experiments results show that the suggested method can improve response time of H-HDD and lower the power consumption.
Keywords
Hybrid hard disk; prefetching; caching; operating system;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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