Re: Help me get my data back...

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#685

From: Robert Tuck
Date: Mon, 22 Mar 1999 00:00

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I have just finished doing a chemistry project about the tribological
properties of monolayers, and whilst doing it I came across an article
in a journal about the spin-off characteristics of different lubrication
compounds, so this would appear to be an important process. However, I
suspect this only happens on really old hard discs that have been in
constant use for a long time. It might be more relevant to todays hard
disks which spin much faster, but I should think the coatings have
improved a lot since then.
M. Barlow, L. Braitberg, L. Davis, V. Dunn and D. Frew, IEEE Trans. On
Mag., 1987, 23, 33
Factoid:
For a 3.5" HD @ 5400rpm, r=4.445cm=.04445m
v=2*pi*r*r.p.m./60
=25.136m/s
centripetal acceleration=v^2/r=14214m/s^2
=1450g!
which is pretty damn big.

> They are talking about the platter lubricant, NOT the
> 'magnetic particles' you mangled what the book said into.

-- 

           Wintalk           |   ICQ         
Bob@rlt20.robinson.cam.ac.uk | 28935507

"I still say a church steeple with a lightening rod on top   
 shows a lack of confidence." - Doug McLeod

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From: Robert Tuck <rlt20@cam.ac.uk>
Subject: Re: Help me get my data back...
Date: 1999/03/22
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