Magnetic signal distribution in disk drives

Author

Schreck, Erhard ; Lin, Herbert

Author_Institution

Advanced Technol. Group, Maxtor Corp., Milpitas, CA, USA

Volume

35

Issue

5

fYear

1999

fDate

9/1/1999 12:00:00 AM

Firstpage

3980

Lastpage

3982

Abstract

This work present an overview of the application of high resolution magnetic read back mapping within a functioning production disk drive. It is demonstrated how magnetic or mechanical media defects can be visualized and discriminated against each other and how track squeeze effects and servo pattern layout/integrity can be studied. Examples are given where only the native data signal is used for the analysis or how additional over writing is used to gain further information. Like in many other fields, the visualization of specific features enhances and contributes to the understanding of underlying mechanism

Keywords

disc drives; failure analysis; flaw detection; hard discs; magnetic recording noise; servomechanisms; disk drives; functioning production drive; high resolution; magnetic media defects; magnetic microscopy; magnetic read back mapping; magnetic signal distribution; mechanical media defects; noise distribution; overwrite measurement; servo burst; servo field; servo pattern layout/integrity; track squeeze effects; visualization of specific features; Convolution; Data visualization; Disk drives; Frequency; Magnetic analysis; Magnetic heads; Magnetic memory; Servomechanisms; Signal analysis; Testing;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.800728

Filename

800728