Conserving disk energy in network servers
ICS '03 Proceedings of the 17th annual international conference on Supercomputing
Energy conservation techniques for disk array-based servers
Proceedings of the 18th annual international conference on Supercomputing
SmartSaver: turning flash drive into a disk energy saver for mobile computers
Proceedings of the 2006 international symposium on Low power electronics and design
Hybrid solid-state disks: combining heterogeneous NAND flash in large SSDs
Proceedings of the 2008 Asia and South Pacific Design Automation Conference
Device-Aware Cache Replacement Algorithm for Heterogeneous Mobile Storage Devices
ICESS '07 Proceedings of the 3rd international conference on Embedded Software and Systems
Energy efficient management scheme for heterogeneous secondary storage system in mobile computers
Proceedings of the 2010 ACM Symposium on Applied Computing
SAIL: self-adaptive file reallocation on hybrid disk arrays
HiPC'08 Proceedings of the 15th international conference on High performance computing
ARC-H: Adaptive replacement cache management for heterogeneous storage devices
Journal of Systems Architecture: the EUROMICRO Journal
Lifetime and QoS-aware energy-saving buffering schemes
Journal of Systems and Software
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While hard disk drives are the most common secondary storage devices, their high power consumption and low shock-resistance limit them as an ideal mobile storage solution. On the other hand, flash memory devices overcome the main problems of hard disk drives, but they are still more expensive in the cost per bit over hard disk drives and can only support a limited number of erase cycles. In this paper, we show that combining the merits of a hard disk and a flash memory device can produce an energy-efficient secondary storage solution for mobile platforms. We propose an energy-efficient file placement technique for such heterogeneous storage systems. The proposed technique adapts an existing data concentration technique by separating read and write I/O requests. Experimental results show that the proposed technique reduces the energy consumption by up to 74.5% when the combination of a 1.8" disk and a flash memory is used instead of a single 2.5" disk, at the cost of small increase in the average response time.