Title :
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
fDate :
6/1/2007 12:00:00 AM
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;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2007.894009
