Thread: EHEIM pump EMI
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Unread 05-22-2002, 12:58 PM   #7
bigben2k
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Join Date: May 2002
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Quote:
Originally posted by Nordic
Actually static magnets (fields) are the most disruptive for magnetically stored media, so we didn't have the disk plugged in - the magnet and disk were "not moving".

Heh, I better talk to the electrical engineer at work who got the idea, in case my claims aren't correct.
Check with him...

Fixed magnets are bad for magnetically stored media, because the movement of the magnet towards the media creates an increase in magnetic field strength (from the tape/HD point of view) which is a varying magnetic field, aka EMI. Keep them at a fair distance, and everything is fine, but rev up the HD platter to 5400 rpm, and wait...

Try the HD thing again, but power it up, not connected to a PC. I can guarantee you that you will never see a HD so messed up
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