Management of tape drive quality using discrete fourier transform analysis
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United States of America Patent
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Feb 17, 2015
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app pub date -
Feb 17, 2014
filing date -
Feb 17, 2014
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Abstract
Embodiments of the present disclosure relates to a method, system, and computer program product for determining an error contribution from a roller bearing in a tape drive. The method includes receiving, from a tape drive, a Position Error Signal (PES) data set. The method also includes determining a number of Discrete Fourier Transform (DFT) iterations based upon a frequency of interest and the number of samples. The method also includes performing, based upon the determined number of DFT iterations, a plurality of DFT iterations on the PES data set including the frequency of interest. Each DFT iteration is performed on a different number of samples from the PES data set. The method also includes identifying a plurality of amplitudes from the plurality of DFT iterations that corresponds to disturbance contributions from one of the rollers in the tape drive.
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