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Hard disk drive apparatus, method of controlling flying height of magnetic head thereof, and recording medium to contain computer program therefor
Hard disk drive apparatus, method of controlling flying height of magnetic head thereof, and recording medium to contain computer program therefor
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机译:硬盘驱动装置,控制其磁头的飞行高度的方法以及包含其计算机程序的记录介质
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摘要
A method of controlling a flying height of a magnetic head of a hard disk drive includes determining whether a difference between a measured flying height of the magnetic head measured by applying a burn-in FOD (flying on demand) voltage corresponding to a target flying height, according to a reference FOD voltage profile defining a relationship between the flying height of the magnetic head and the FOD voltage by which an end of the magnetic head thermally expands and thus protrudes, to a heater included in the magnetic head, and a burn-in flying height of the reference FOD voltage profile corresponding to the burn-in FOD voltage exceeds a preset reference, calculating a corrected FOD voltage for the target flying height by performing a touch down test of the magnetic head with respect to a disk, when the difference between the measured flying height of the magnetic head and the burn-in flying height exceeds the preset reference, and controlling a flying height of the magnetic head by applying the corrected FOD voltage. An FOD voltage can be applied in a variety of environments to substantially maintain the target FH of the magnetic head.
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