Quote:
Originally posted by Nordic
Actually, at work we tried to kill a 10 gig drive (IBM) with a huge frickin magnet from some PA speaker. We let the magnet rest on the drive for a few days but all of the data was intact. That was a mind-blower..
So I'm not a least bit concerned about wiping data of my drives anytime soon.. the drive will have failed due to mechanical problems before that.
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Wow! Thanks for that great info, Nordic!
Magnets themselves have a magnetic field, but don't actually generate EMI field, but a MOVING magnet does! In the test above, the disk drive platter was spinning at at least 5400 rpm (right Nordic?) which has the same result.
EMI comes from just about any AC powered device, simply because the voltage changes from 0 to +170V to 0 to -170V (hence 120 Vac, which is RMS, with a peak at 170V) in a nice sine wave.