Re: 65 - A good reason to remove, dissemble and drill out drive platters with at least 3-4 holes 1/4” in size. One site we work at grinds the platters.
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If that one site you cite (Hey I’m a poet!) grinds them to dust that’s best. (Melting them works to!)
You’d be amazed what’s recoverable ! Maybe not all but something if something is beter then nothing ! It’s about how much time & money you want to put into it.