Optimization of Magnetic Read Widths in Two-Dimensional Magnetic Recording Based on Micromagnetic Simulations

Author

Jihoon Park ; Lengsfield, Byron ; Galbraith, Rick ; Wood, Roger ; Sidi Fu

Author_Institution

A Western Digital Co., HGST, San Jose, CA, USA

Volume

51

Issue

11

fYear

2015

Firstpage

1

Lastpage

4

Abstract

Optimization of magnetic read widths (MRWs) and reader positions in two-dimensional magnetic recording (TDMR) is explored in order to maximize an areal density (AD) gain over shingled magnetic recording (SMR). The optimization is based on micromagnetic waveforms from 511-bit maximal-length pseudorandom binary sequence (PRBS) patterns. The identical MRWs for two readers are initially considered and the best reader offset is found in order to achieve the largest AD gain. Given the best reader offset, the MRWs for the two readers are changed to further enhance the AD gain. A software channel is utilized to identify the major contribution of the TDMR AD gain.

Keywords

binary sequences; magnetic recording; random sequences; 2D magnetic recording; areal density gain; magnetic read width optimization; maximal length pseudorandom binary sequence patterns; micromagnetic simulations; reader position; shingled magnetic recording; software channel; Bit error rate; Gain; Magnetic recording; Media; Micromagnetics; Signal to noise ratio; Magnetic read width (MRW); Two dimensional magnetic recording (TDMR); magnetic read width (MRW); micromagnetic waveform; pseudo random binary sequence (PRBS); pseudorandom binary sequence (PRBS); shingled magnetic recording (SMR); software channel; two-dimensional magnetic recording (TDMR); waveform combining;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2015.2457395

Filename

7160739