Operational Shock Analysis for 2.5-in Multi-Disk HDD Considering Ramp-Disk Gap Irregularity

With an increased mobility, hard disk drives (HDDs) now use ramp load/unload technology, and multiple disks are used to increase the data capacity. This can result in contact between the ramp and the disks, which negatively affects the slider dynamics under operational shock conditions. There are se...

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Veröffentlicht in:IEEE transactions on magnetics 2017-03, Vol.53 (3), p.1-4
Hauptverfasser: Joo Young Yoon, Jonghak Choi, Geonyun Lim, No-Cheol Park, Young-Pil Park, Kyoung-Su Park, Minjae Kim
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container_issue 3
container_start_page 1
container_title IEEE transactions on magnetics
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creator Joo Young Yoon
Jonghak Choi
Geonyun Lim
No-Cheol Park
Young-Pil Park
Kyoung-Su Park
Minjae Kim
description With an increased mobility, hard disk drives (HDDs) now use ramp load/unload technology, and multiple disks are used to increase the data capacity. This can result in contact between the ramp and the disks, which negatively affects the slider dynamics under operational shock conditions. There are several types of ramp-disk contact, such as simultaneous, successive, and single contact, and these depend on the distance between the ramp and each disk in a multi-disk HDD. This paper examines the effect of ramp-disk contact on the slider dynamics using a transient shock analysis. The ramp-disk contact affects the head stack assembly bending mode and slider dynamics. The effect of irregular gaps between the disks and adjacent ramp on the slider dynamics is analyzed with the ramp-disk contact force. The simulation shows that the gap irregularity between the ramp and each disk should be as small as possible to improve the stability of the slider dynamics.
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subjects Analytical models
Dynamics
Electric shock
Force
Frequency-domain analysis
Gap difference
head stack assembly (HSA) bending mode
Numerical models
ramp–disk contact
slider dynamics
Springs
title Operational Shock Analysis for 2.5-in Multi-Disk HDD Considering Ramp-Disk Gap Irregularity
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