Disk flutter and its impact on HDD servo performance

Author

Lin Guo ; Chen, Y.-J.D.

Author_Institution

Adv. Technol. Group, Maxtor Corp., CA, USA

fYear

2000

fDate

6-8 Nov. 2000

Abstract

With rapid growth in storage density and spindle motor speed in hard disk drives (HDDs), disk flutter and its impact on drive performance is becoming a more and more important issue. Vibrations of disks used in 3.5" hard disk drives have been measured and studied. A model has been developed to translate disk motion measured in axial direction to actual head off-track motion. This model is constructed based on geometric modeling and FEM analysis of disk mode shapes. It has been validated by drive level position error signal (PES) measurements. Based on the model and flutter measurement, impact of disk flutter on PES has been studied and PES projection for various RPMs drives have been carried out.

Keywords

disc drives; finite element analysis; hard discs; servomotors; vibrations; 3.5 in; disk flutter; finite element analysis; geometric model; hard disk drive; head off-track motion; position error signal; servo; spindle motor; storage density; vibration; Drives; Finite element methods; Hard disks; Motion measurement; Servomechanisms; Shape; Solid modeling; Time measurement; Tracking; Vibration measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Asia-Pacific Magnetic Recording Conference, 2000. APMRC 2000

Conference_Location

Tokyo, Japan

Print_ISBN

0-7803-6254-3

Type

conf

DOI

10.1109/APMRC.2000.898918

Filename

898918