A Note on Disk Drag Dynamics

Details A Note on Disk Drag Dynamics A Note on Disk Drag Dynamics

2012-01-30

arxiv.org/abs/1201.6402v1

Computer Science

Performance

5 pages, 3 figures

Scientific paper

The electrical power consumed by typical magnetic hard disk drives (HDD) not only increases linearly with the number of spindles but, more significantly, it increases as very fast power-laws of speed (RPM) and diameter. Since the theoretical basis for this relationship is neither well-known nor readily accessible in the literature, we show how these exponents arise from aerodynamic disk drag and discuss their import for green storage capacity planning.

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