An off-track capability model including noise

Author

Beach, R.S. ; Bonyhard, P.I.

Author_Institution

Adv. Concepts Labs., Seagate Technol., San Jose, CA, USA

Volume

34

Issue

4

fYear

1998

fDate

7/1/1998 12:00:00 AM

Firstpage

1961

Lastpage

1963

Abstract

An analytical model for off-track capability (OTC) is developed. The model is built on the assumption that, for a given channel, the overall signal to noise ratio (SNR) determines the bit-error-rate (BER). Written magnetization consists of a data track, adjacent tracks and attendant erase bands, and previously written “old information.” SNR is determined by the position of the read-back sensor over the medium, and by the characteristic signal, electronic noise, and media noise powers. These parameters are presumed constant for a particular head, disc, and linear density. OTC is determined as the off-track distance beyond which the SNR falls below a given threshold value, which can be correlated to a threshold BER. We compare OTC as predicted by the model to experimental measures of OTC as the track pitch is varied

Keywords

magnetic disc storage; magnetic heads; magnetic recording noise; bit-error-rate; disk-drive systems; electronic noise; erase bands; linear density; media noise power; off-track capability model; overall signal to noise ratio; read-back sensor; threshold BER; threshold value; track pitch; Bit error rate; Geometry; Interference; Magnetic heads; Magnetic sensors; Magnetization; Predictive models; Sensor phenomena and characterization; Signal to noise ratio; Solid modeling;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.706757

Filename

706757