Unfortunately the degausing trick doesn’t work that well with newer higher capacity harddrives. As capacity increases they actually need to be less sensitive to magnetic fields to prevent multiple bits flipping when the drive head tries to write data. With modern multiterabyte harddrives you’re going to have a hard time reliably wiping the platters with anything short of an MRI magnetic field. That’s not to say smaller magnetic fields like degausing coils can’t be damaging; they will just take a long time to destroy enough of the data to prevent recovery. You’re actually more likely to break the drive heads with a degausing coil than you are to wipe the platters.
Comment on What is the best way to safely and completely erase all data from old laptops?
MechanicalJester@lemm.ee 6 months ago
Since no one mentioned it: VCR tape eraser.
Basically just an electromagnet that oscillates because it’s running directly from AC current.
With an extension cord you could erase all the hard drives in a computer lab just waving the eraser vaguely where the drives are.
Physical destruction is better though.
Fosheze@lemmy.world 6 months ago
Nibodhika@lemmy.world 6 months ago
That doesn’t work for SSDs though.