Performance roughness characterization for high density magnetic recording systems

Author

Liu, Bo ; Hu, Sheng-Bin ; Zhou, Gongye ; Zhang, Wei ; Mydeen, Abusalih S M

Author_Institution

Data Storage Inst., Singapore univ., Singapore

Volume

35

Issue

5

fYear

1999

fDate

9/1/1999 12:00:00 AM

Firstpage

3983

Lastpage

3985

Abstract

As technology moves to 40 Gb/in² areal densities and channel density above 3, media homogeneity and nonlinear transition interaction become crucial in defining the reliability of the recording systems. As a result, mapping and zoom-in analysis of the recording capability/performance becomes important. Two concepts are proposed in this work for performance analysis: recording performance roughness analysis and dynamic magnetic roughness analysis. The recording performance roughness analysis is based on an in-situ measurement technique of the nonlinear transition shift (NLTS). Relationship between the performance roughness and the roughness of dynamic magnetic parameters are studied. Results of experimental investigations indicate that the NLTS based performance roughness analysis can reveal more details on media´s recording capability and the capability fluctuation and is an effective method for performance evaluation and failure analysis

Keywords

failure analysis; magnetic disc storage; magnetic heads; magnetic recording noise; performance evaluation; reliability; surface topography; dynamic magnetic roughness analysis; failure analysis; head-disk spacing; high density magnetic recording systems; in-situ measurement; nonlinear transition shift; performance roughness analysis; recording performance roughness; recording system reliability; Disk drives; Disk recording; Failure analysis; Fluctuations; Magnetic analysis; Magnetic recording; Memory; Performance analysis; Rough surfaces; Surface roughness;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.800729

Filename

800729