[Cryptography] Magnetic media destruction question

[John Levine]

It appears that Jon Callas <jon at callas.org> said:
>I propose a test: saw a drive in half and then see what can be recovered. That's a 60mm by 120mm semicircle.

I have to say that I'm impressed that I seem to be the only person in this
discussion who has looked to see what DIN 66399, now ISO/IEC 21964 actually
says.

The T series pf specs that includes T-7 2.5mm² chips is for magnetic media, like
floppy disks and access cards. There is a separate H series for hard drives, H-1
to H-7, where H-7 is "split, deformed, 5mm²" chips. They're four times as big
but I agree with you that even at that size it is extremely unlikely that anyone
could recover anything.

R's,
John