A Novel HDD “Component-Level” Operational-Shock Measurement Method

Author

Thornton, Brian H. ; Eguchi, Takehiko ; Suk, Mike

Author_Institution

Hitachi Global Storage Technol., San Jose, CA

Volume

43

Issue

6

fYear

2007

fDate

6/1/2007 12:00:00 AM

Firstpage

2316

Lastpage

2318

Abstract

This paper describes and validates a novel experimental method for measuring the operational-shock performance of hard-disk drives, which allows for easy replacement of mechanical components. By nonintrusively instrumenting the hard-disk drive with the ability to measure the dynamic capacitance change between the slider and disk, we are able to obtain slider air-bearing dynamics, slider lift-off, and slider-disk contact during operational-shock events and ultimately failure. We also discuss a complex nonlinear model for accurate simulation of operational-shock events. The experimental data is compared to drive-level data and modeling results for various combinations of mechanical components showing excellent correlation. From this method, we are able to quickly evaluate operational-shock performance of various components on a hard-disk drive level

Keywords

disc drives; hard discs; air-bearing dynamics; component-level operational-shock measurement method; dynamic capacitance measurement; hard disk drives; mechanical components; slider lift-off; slider-disk contacts; Capacitance measurement; Consumer electronics; Discrete event simulation; Electric shock; Hard disks; Instruments; Mechanical variables measurement; Robustness; Steady-state; Testing; Hard-disk drive (HDD); head-disk interface; operational shock; shock robustness;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2007.894009

Filename

4202945