Analysis of media defects in thick recording media

Abstract

The defect behavior of thick particulate media is investigated by introducing artificial defects of known depth, measuring their signal loss characteristics as a function of frequency, and then relating actual measured drop-out lengths to the experimentally determined artificial defect depth data. The results indicate that the number of drop-outs per track is exponentially related to a “critical depth” parameter. The data can be used to extrapolate density capabilities of a given medium using a set of experimental artificial defect data taken at a lower performance level. © 1979 IEEE