Magnetic field affecting hard drive?

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4 total messages Started by Aaron David Herskowitz Sat, 26 Sep 1992 01:56

#1078

Author: Aaron David Herskowitz
Date: Sat, 26 Sep 1992 01:56

15 lines
1227 bytes

I just bought a US Robotics modem and would like to put it on top of or  
near my external hard drive to free up some desk real estate. I know that  
all speakers have magnets in them and was wondering if it is dangerous to  
get a modem with a speaker too close to a hard disk.

I would appreciate any comments or experiences with something like this.

Thanks,
Aaron

--
Aaron  Herskowitz   deepthought!redbaron!aaronh@ms.uky.edu    [NeXTmail]
  Case Western Reserve University NeXT Users Group, Cleveland, Ohio
-- 
Aaron  Herskowitz      deepthought!aaronh@ms.uky.edu      [NeXTmail]

Re: Magnetic field affecting hard drive?

#1083

Author: J. G. Gregory
Date: Sat, 26 Sep 1992 16:33

14 lines
976 bytes

In article <1992Sep26.015600.12679@redbaron.uucp>  
deepthought!redbaron!aaronh@ms.uky.edu (Aaron David Herskowitz) writes:
>I just bought a US Robotics modem and would like to put it on top of or  
>near my external hard drive to free up some desk real estate. I know that  
>all speakers have magnets in them and was wondering if it is dangerous to  
>get a modem with a speaker too close to a hard disk.
>
>I would appreciate any comments or experiences with something like this.

Disk drives have motors in them.  Motors have magnetic fields around them.   
Disks work.

Don't worry.
--J Gregory

Re: Magnetic field affecting hard drive?

#1091

Author: Matthew Dillon
Date: Sun, 27 Sep 1992 19:50

20 lines
1065 bytes

>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

--

    Matthew Dillon		dillon@Overload.Berkeley.CA.US
    1005 Apollo Way		uunet.uu.net!overload!dillon
    Incline Village, NV. 89451	ham: KC6LVW (no mail drop)
    USA 			Sandel-Avery Engineering (702)831-8000

Re: Magnetic field affecting hard drive?

#1093

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

28 lines
1660 bytes

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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