Experimental and Simulation Study of Thermal Protrusion-Induced Head-Disk Contact Instabilities in Hard Disk Drives

2014 ◽  
Vol 50 (11) ◽  
pp. 1-5 ◽  
Author(s):  
Yung-Kan Chen ◽  
Jih-Ping Peng ◽  
David B. Bogy
Keyword(s):  
Simulation Study ◽  
Hard Disk Drives ◽  
Hard Disk ◽  
Disk Drives ◽  
Disk Contact ◽  
Thermal Protrusion

Write Protrusion Modulation for Sub-Nanometer Contact Interference

2005 ◽  
Author(s):  
Bernhard Knigge ◽  
Barry Stipe ◽  
Robert Payne ◽  
Peter Baumgart
Keyword(s):  
Thermal Expansion ◽  
Hard Disk Drives ◽  
Hard Disk ◽  
High Accuracy ◽  
Contact Dynamics ◽  
Disk Drives ◽  
Short Pulses ◽  
New Methods ◽  
Thermal Protrusion ◽  
Short Contacts

With the continual reduction in slider to disk clearance in hard disk drives, new methods to measure this clearance with high accuracy are needed. Understanding the contact dynamics when touching the disk at sub-nanometer interference levels is an important aspect of the problem. We have developed a new methodology to gradually bring the slider into contact with the disk, based on controlled and localized thermal expansion of the slider as it occurs during the regular write process (write induced protrusion). By applying short pulses to produce time controlled thermal protrusion, the duration of contact can be limited to a few milliseconds, by which short contacts and their contact hysteresis can be investigated.

Numerical Simulation of Dynamic Loading in Hard Disk Drives

1993 ◽  
Vol 115 (3) ◽  
pp. 370-375 ◽  
Author(s):  
T. G. Jeong ◽  
D. B. Bogy
Keyword(s):  
Numerical Simulation ◽  
Dynamic Loading ◽  
Hard Disk Drives ◽  
Experimental Parameter ◽  
Hard Disk ◽  
Parameter Study ◽  
Air Bearing ◽  
Disk Drives ◽  
Loading Process ◽  
Disk Contact

The dynamic loading process in hard disk drives is simulated numerically. The effects of the slider’s loading velocity and initial pitch and roll on its dynamics during loading, as well as on slider-disk contacts, are studied by using the dynamic loading simulator. The air bearing forces due to the squeezing and shearing flows are calculated and their contributions to the dynamics of the slider during loading are investigated. Slider-disk contacts are considered in the numerical simulation through generalized impulse-momentum equations. Slider-disk contact criteria are obtained from the numerical simulation, and they are compared with those obtained from a previous experimental parameter study.

Head–disk contact detection in the hard-disk drives

Wear ◽  
2003 ◽  
Vol 255 (7-12) ◽  
pp. 1314-1322 ◽  
Author(s):  
Andrei Khurshudov ◽  
Peter Ivett
Keyword(s):  
Hard Disk Drives ◽  
Hard Disk ◽  
Contact Detection ◽  
Disk Drives ◽  
Disk Contact

scholarly journals Examining the feasibility of the urban mining of hard disk drives

2020 ◽  
Vol 248 ◽  
pp. 119216
Author(s):  
Laura Talens Peiró ◽  
Alejandra Castro Girón ◽  
Xavier Gabarrell i Durany
Keyword(s):  
Hard Disk Drives ◽  
Hard Disk ◽  
Disk Drives ◽  
Urban Mining

scholarly journals Evaluation of Vibration Characteristics of Suspensions for Hard Disk Drives and Reducing the Vibration by Using Viscoelastic Dampers.

2002 ◽  
Vol 68 (667) ◽  
pp. 720-727 ◽  
Author(s):  
Hiromitsu MASUDA ◽  
Toshihiko SHIMIZU ◽  
Mikio TOKUYAMA ◽  
Haruhide TAKAHASHI ◽  
Kousaku WAKATSUKI ◽  
...  
Keyword(s):  
Hard Disk Drives ◽  
Hard Disk ◽  
Vibration Characteristics ◽  
Disk Drives ◽  
Viscoelastic Dampers

Feasibility study of thermal positioning control actuator for hard disk drives

2012 ◽  
Vol 18 (9-10) ◽  
pp. 1383-1388 ◽  
Author(s):  
Masaru Furukawa ◽  
Junguo Xu ◽  
Jin Liu ◽  
Jianhua Li ◽  
Shoya Nosaki ◽  
...  
Keyword(s):  
Feasibility Study ◽  
Hard Disk Drives ◽  
Hard Disk ◽  
Disk Drives ◽  
Positioning Control
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