Management of tape drive quality using discrete fourier transform analysis

摘要

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.

主权项

1. A method comprising:
receiving, from a tape drive, a Position Error Signal (PES) data set, that describes a positional variance of a head tape interface in relation to a tape and that has a number of samples; determining a frequency of interest based on a size of one or more rollers in the tape drive and a velocity of the tape; determining a number of Discrete Fourier Transform (DFT) iterations based upon the frequency of interest and the number of samples; 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 performed on a different number of samples from the PES data set; and identifying a plurality of amplitudes from the plurality of DFT iterations that corresponds to disturbance from one of the rollers in the tape drive.