Power Management of MEMS-Based Storage Devices for Mobile Systems


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Khatib, M.G. and Hartel, P.H. (2008) Power Management of MEMS-Based Storage Devices for Mobile Systems. In: Proceedings of the 8th ACM & IEEE International Conference on Compilers, Architecture, and Synthesis for Embedded Systems (CASES '08), 19-24 Oct 2008, Atlanta, USA (pp. pp. 245-254).

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Abstract:Because of its small form factor, high capacity, and expected low cost, MEMS-based storage is a suitable storage technology for mobile systems. MEMS-based storage devices should also be energy efficient for deployment in mobile systems. The problem is that MEMS-based storage devices are mechanical, and thus consume a large amount of energy when idle. Therefore, a power management (PM) policy is needed that maximizes energy saving while minimizing performance degradation.

In this work, we quantitatively demonstrate the optimality of the fixed-timeout PM policy for MEMS-based storage devices. Because the media sled is suspended by springs across the head array in MEMS-based storage devices, we show that these devices (1) lack mechanical startup overhead and (2) exhibit small shutdown overhead. As a result, we show that the combination of a PM policy, that fixes the timeout in the range of 1--10~ms, and a shutdown policy, that exploits the springs, results in a near-optimal energy saving yet at a negligible loss in performance.
Item Type:Conference or Workshop Item
Faculty:
Electrical Engineering, Mathematics and Computer Science (EEMCS)
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Link to this item:http://purl.utwente.nl/publications/65054
Official URL:http://dx.doi.org/10.1145/1450095.1450131
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