Re: Magnetic field affecting hard drive?

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#1093

From: Daniel K Hartman
Date: Mon, 28 Sep 1992 12:07

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In article <dillon.0of9@overload.Berkeley.CA.US> dillon@overload.Berkeley.CA.US (Matthew Dillon) writes:
>>In article <1992Sep26.163328.833@proforma.com> jgg@proforma.com (J. G. Gregory) writes:
>>>In article <1992Sep26.015600.12679@redbaron.uucp>
>>
>>Disk drives have motors in them.  Motors have magnetic fields around them.
>>Disks work.
>>
>>Don't worry.
>>--J Gregory
>
>    Disk drives have incredible magnets in them, it can take 10+ pounds of
>    force to pry them apart.  (The head positioning mechanism).
>
>					-Matt
>

Yeah, but if the motor is designed correctly, you won't have any magnetic
field leakage (well, very little).  I would try to explain the physics, but
I think I'd be laughed off the net.

Anyways, for a demo, find someone who's really into RC Electric cars, and
ask to look at one of the really good motors (like an Astro-Flite cobalt).
Almost zero magnetic leakage, but wow, are the magnetics strong!

No, I'm not affiliated with Astro-Flite in any way, other than owning two
of their motors 8-).

-dan hartman

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Message-ID: <1992Sep28.120717.6491@athena.mit.edu>

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References: <1992Sep26.015600.12679@redbaron.uucp> <1992Sep26.163328.833@proforma.com> <dillon.0of9@overload.Berkeley.CA.US>

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From: omv@athena.mit.edu (Daniel K Hartman)
Subject: Re:  Magnetic field affecting hard drive?
Message-ID: <1992Sep28.120717.6491@athena.mit.edu>
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References: <1992Sep26.015600.12679@redbaron.uucp> <1992Sep26.163328.833@proforma.com> <dillon.0of9@overload.Berkeley.CA.US>
Date: Mon, 28 Sep 1992 12:07:17 GMT
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