Stochastic evaluation of magnetic head wears in hard disk drives

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

37 Scopus Citations
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Author(s)

  • Yu Wang
  • Zhi-Sheng Ye
  • Kwok-Leung Tsui

Detail(s)

Original languageEnglish
Article number3301507
Journal / PublicationIEEE Transactions on Magnetics
Volume50
Issue number5
Online published3 Dec 2013
Publication statusPublished - May 2014

Abstract

Head wear becomes inevitable as the physical clearance between the head and disk in current hard disk drives is close to 1 nm or lower. Accurate characterization of the wear process is essential in understanding the wear mechanism, evaluating the reliability of hard disk drives (HDDs), and predicting the future evolution of wear as well as guiding the design of HDDs of later vintages. Due to the variations in the material and geometry of magnetic head, the wear process is dynamic and stochastic. To cope with the dynamics, a Wiener process with a positive drift is used to model the wear process. Furthermore, to evaluate the reliability quickly, an accelerated degradation model using the wear measurements is developed, from which the parameters/failure times under light loads can be effectively predicted. The developed model is then applied to a real wear problem of magnetic head to demonstrate the effectiveness.

Research Area(s)

  • Accelerated degradation test, head wear, Wiener process

Citation Format(s)

Stochastic evaluation of magnetic head wears in hard disk drives. / Wang, Yu; Ye, Zhi-Sheng; Tsui, Kwok-Leung.
In: IEEE Transactions on Magnetics, Vol. 50, No. 5, 3301507, 05.2014.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review