Andrew Miloradovsky is a user on functional.cafe. You can follow them or interact with them if you have an account anywhere in the fediverse. If you don't, you can sign up here.

dd'ing old drives (the ones that I didn't smash up)

@cwebber
You shouldn't fill the drives with plain zeros (that doesn't really destroy the information), but with random bits, e.g. using symmetrically encrypted zeros.
Or use `shred`.

@amiloradovsky @cwebber for the normal user, 0s is enough right? You need special tools to read what was there before the 0s, right?

Andrew Miloradovsky @amiloradovsky

@abc
Yes, you need some electronic equipment to read the plates' weak/residual magnetic properties. — That's not something you can do using just the standard HDD interfaces (buses & protocols). It's one of those hardcore infosec tricks.
@cwebber