Improving hard disk drive unloading performance with a disk bump

Yonghyun Lee; Kyoung Su Park; Hyung Jun Lee; Ki Hoon Kim; No Cheol Park; Young Pil Park

doi:10.1109/TMAG.2008.2010639

Improving hard disk drive unloading performance with a disk bump

Yonghyun Lee, Kyoung Su Park, Hyung Jun Lee, Ki Hoon Kim, No Cheol Park, Young Pil Park

Department of Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

Most hard disk drives use ramp load/unload (L/UL) technology because of its many advantages. However, L/UL does have some unresolved drawbacks, such as slider-disk contact during fast unloading. The main objective of our research is to examine the use of a bump on the outer edge of the disk to prevent contact with the disk by the rebounding slider and to improve ramp unloading performance. In particular, this paper focuses on experimental verification of the design of the disk bump that resulted from our previous research. We formed the disk bump on the disk surface using mechanical pressing with tungsten tips and tested the effect of the bump in unloading experiments. An investigation of the acoustic emission burst signal and its power spectrum confirmed that the optimal disk bump prevented slider-disk contact. This improves the ramp unloading performance.

Original language	English
Article number	4782106
Pages (from-to)	810-815
Number of pages	6
Journal	IEEE Transactions on Magnetics
Volume	45
Issue number	2
DOIs	https://doi.org/10.1109/TMAG.2008.2010639
Publication status	Published - 2009 Feb

Bibliographical note

Funding Information:
This work was supported by the Korea Science and Engineering Foundation through the Center for Information Storage Mechatronics under Grant R17-2008-040-01001-0.

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

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10.1109/TMAG.2008.2010639

Cite this

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title = "Improving hard disk drive unloading performance with a disk bump",

abstract = "Most hard disk drives use ramp load/unload (L/UL) technology because of its many advantages. However, L/UL does have some unresolved drawbacks, such as slider-disk contact during fast unloading. The main objective of our research is to examine the use of a bump on the outer edge of the disk to prevent contact with the disk by the rebounding slider and to improve ramp unloading performance. In particular, this paper focuses on experimental verification of the design of the disk bump that resulted from our previous research. We formed the disk bump on the disk surface using mechanical pressing with tungsten tips and tested the effect of the bump in unloading experiments. An investigation of the acoustic emission burst signal and its power spectrum confirmed that the optimal disk bump prevented slider-disk contact. This improves the ramp unloading performance.",

author = "Yonghyun Lee and Park, {Kyoung Su} and Lee, {Hyung Jun} and Kim, {Ki Hoon} and Park, {No Cheol} and Park, {Young Pil}",

note = "Funding Information: This work was supported by the Korea Science and Engineering Foundation through the Center for Information Storage Mechatronics under Grant R17-2008-040-01001-0.",

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AU - Kim, Ki Hoon

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AU - Park, Young Pil

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AB - Most hard disk drives use ramp load/unload (L/UL) technology because of its many advantages. However, L/UL does have some unresolved drawbacks, such as slider-disk contact during fast unloading. The main objective of our research is to examine the use of a bump on the outer edge of the disk to prevent contact with the disk by the rebounding slider and to improve ramp unloading performance. In particular, this paper focuses on experimental verification of the design of the disk bump that resulted from our previous research. We formed the disk bump on the disk surface using mechanical pressing with tungsten tips and tested the effect of the bump in unloading experiments. An investigation of the acoustic emission burst signal and its power spectrum confirmed that the optimal disk bump prevented slider-disk contact. This improves the ramp unloading performance.

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Improving hard disk drive unloading performance with a disk bump

Abstract

Bibliographical note

All Science Journal Classification (ASJC) codes

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