4tb Hard drives magnetic field

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andreaszach011

Oct 9, 2018
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Hi, ich recently ordered 2 4tb externals HDDS and nothing Action strange.

Wien connected to the USB Port the cable stiffens up and There Seems to be a magnetic field causing this

Question: is this normal Ort will it break my Desktop PC and the external drives? Ich have Other smaller drives Which do Not Show this behaviour
 
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ingtar33

ingtar33

Glorious
Dec 17, 2012
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a proper enclosure should behave as proper faraday cage. there should be no electromagnetic field generated. Furthermore mechanical drives are sensitive to magnetic fields, as they corrupt the data they contain. those drives wouldn't be functioning properly if there was a strong enough mechanical field to cause a physical phenomenon.
 
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ingtar33

ingtar33

Glorious
Dec 17, 2012
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45,840


that's not magnetic resistance, that's caused by rotational force (centrifugal force) caused by the spinning hard drive.
 
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COLGeek

COLGeek

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Apr 6, 2009
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No, but there are (potentially) more drive platters (mass), generating more force. The 4TB drive could also have a higher rotational speed than your other drives.
 
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Someone Somewhere

Someone Somewhere

Titan
Sep 23, 2012
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A 3.5" drive has a lot more spinning mass than a 2.5" drive - is your 1TB one a smaller laptop-style drive?

More mass means the gyroscopic effect is larger.

It has nothing to do with magnetism; you can feel it with e.g. a bike wheel removed from the bike.

This post has a tiny bit about it: http://www.savel.org/2015/06/26/gyroscopic-effects-in-high-speed-hard-drives/
 
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