Extendibility Of Traditional Perpendicular Magnetic Recording For Hard Disk Drives
JOURNAL OF APPLIED PHYSICS(2011)
摘要
We present an analysis of the extendability of traditional perpendicular recording based on micromagnetic recording simulation and channel cost/performance analysis. The analysis indicates that head field gradient is the single most important factor in realizing densities above 1.0 Tb/in(2). The conclusion of this analysis is that 1.5 Tb/in(2) may be possible with this technology, but 2 Tb/in(2) will be extremely challenging, perhaps impossible even with powerful channel chips. We also examine the extendibility of servo systems, and conclude that either actuator bandwidth must be increased by a factor of 2 from today's drives or integrated disturbance power spectrum must be decreased by a factor of 2 to reach densities of 2 Tb/in(2) and beyond. (C) 2011 American Institute of Physics. [doi:10.1063/1.3563095]
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关键词
chip,power spectrum,servo system
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