Reduced-complexity modified per-survivor iterative timing recovery using M-algorithm for magnetic recording system

2011 ◽  
Author(s):  
Chanon Warisarn ◽  
Pornchai Supnithi ◽  
Piya Kovintavewat
Keyword(s):  
Magnetic Recording ◽  
Recording System ◽  
Timing Recovery ◽  
Reduced Complexity

Effect of Molecular Weight on Lubricant Depletion in a Heat Assisted Magnetic Recording System

2017 ◽  
Author(s):  
Deng Pan ◽  
Wenping Song
Keyword(s):  
Molecular Dynamics ◽  
Molecular Weight ◽  
Molecular Dynamics Simulation ◽  
Magnetic Recording ◽  
Recording System ◽  
Dynamics Simulation ◽  
Disk System ◽  
Heat Assisted Magnetic Recording ◽  
Lubricant Depletion

A model for studying lubricant depletion in HAMR slider/disk system was developed based on molecular dynamics simulation. We found that the lubricant molecular weight has small effect on lubricant depletion.

Head Instability Detection for Testing Process in Perpendicular Magnetic Recording System

2013 ◽  
Vol 770 ◽  
pp. 319-322 ◽  
Author(s):  
Piya Kovintavewat ◽  
Santi Koonkarnkhai ◽  
Aimamorn Suvichakorn
Keyword(s):  
Magnetic Recording ◽  
Signal To Noise Ratio ◽  
Disk Drive ◽  
Detection Algorithm ◽  
Recording System ◽  
High Signal ◽  
Signal To Noise ◽  
Perpendicular Magnetic Recording ◽  
Read Head ◽  
Pass Through

During hard disk drive (HDD) testing process, the magneto-resistive read (MR) head is analyzed and checked if the head is defective or not. Baseline popping (BLP) is one of the crucial problems caused by head instability, whose effect can distort the readback signal to the extent of causing possible sector read failure. Without BLP detection algorithm, the defective read head might pass through HDD assembling process, thus producing an unreliable HDD. This situation must be prevented so as to retain customer satisfaction. This paper proposes a simple (but efficient) BLP detection algorithm for perpendicular magnetic recording systems. Results show that the proposed algorithm outperforms the conventional one in terms of both the percentage of detection and the percentage of false alarm, when operating at high signal-to-noise ratio.

Perspectives of Magnetic Recording System at 10 Tb/in$^{2}$

2009 ◽  
Vol 45 (11) ◽  
pp. 5038-5043 ◽  
Author(s):  
Zhi-Min Yuan ◽  
Bo Liu ◽  
Tiejun Zhou ◽  
Chi Keong Goh ◽  
Chun Lian Ong ◽  
...  
Keyword(s):  
Magnetic Recording ◽  
Recording System

Numerical Investigation of Thermal Problems in Heat-Assisted Magnetic Recording System

2009 ◽  
Vol 45 (11) ◽  
pp. 4962-4965 ◽  
Author(s):  
Q. D. Zhang ◽  
B. X. Xu ◽  
J. Zhang ◽  
N. Y. Liu ◽  
G. L. Chin ◽  
...  
Keyword(s):  
Numerical Investigation ◽  
Magnetic Recording ◽  
Recording System ◽  
Heat Assisted Magnetic Recording

Chapter 11: Tribology in Magnetic Recording System

2009 ◽  
pp. 210-210-27
Author(s):  
Shizhu Wen ◽  
Jianbin Luo ◽  
Yuanzhong Hu ◽  
Jianbin Luo ◽  
Weiming Lee ◽  
...  
Keyword(s):  
Magnetic Recording ◽  
Recording System

Investigation of Perpendicular Magnetic Recording Footprint by Spin-Stand Microscopy

2015 ◽  
Vol 781 ◽  
pp. 215-218
Author(s):  
Nuttapon Chaidaungsri ◽  
Arkom Kaewrawang ◽  
Komkrit Chooruang ◽  
Damrongsak Tongsomporn
Keyword(s):  
Magnetic Recording ◽  
Recording System ◽  
Perpendicular Magnetic Recording ◽  
Write Heads

The characteristics of magnetic recording are necessary to understand in order to increase the areal densities and improve the perfermance of recording system. Therefore, experimental tools must be developed to help researchers to carry out signal and noise recording experiments on different heads and media combinations. In this paper, the perpendicular magnetic recording footprint using spin-stand microscopy is demonstrated. It was found experimentally that the magnetic footprint can precisely catch some recording dynamics of the write heads during the write gate off conditions and also provide useful insight information of the recording performance.

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