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From: chao@oahu.cs.ucla.edu (Chia-Chi Chao)
Newsgroups: comp.sys.ibm.pc.hardware
Subject: Re: Can noisy power supply kill disks?
Keywords: ESDI, Voice coil, +12V
Message-ID: <1991May22.231849.4854@cs.ucla.edu>
Date: 22 May 91 23:18:49 GMT
References: <16379.2839b83d@levels.sait.edu.au>
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In article <16379.2839b83d@levels.sait.edu.au> xtdn@levels.sait.edu.au writes:
>I've heard that physical damage can be done to the heads and/or servo
>tracks of voice coil drives if the +12V power rail is noisy.  I think
>the problem has to do with the heads incorrectly loading or unloading.
>How could the heads crash (or the servo tracks get damaged) through
>incorrect loading or unloading of the heads; and how could a noisy +12V
>power rail cause the heads to load or unload incorrectly?

Hmm, this may explain why I have heard my two hard drives unload and load again
at the same time.  I may buy the Silencer 200 from PC Power & Cooling.  Does
anyone have experience with that model, or PCP&C in general?  The fan is
supposed to be very quiet.  Anybody using one?  Thanks.
-- 

Chia-Chi Chao     chao@cs.ucla.edu    ..!ucbvax!cs.ucla.edu!chao