It won't burn.
Reason: current HDD plates are made of glass.

BTW: Long time ago I experimented with thermite and it is not such easy to start reaction. Not to mention the reaction below will not take place. (Oxygene is present at first, amount of ferrum oxide was significantly less than amount of Al, etc.).

To summarize the topic, which is how to delete files:
If you don't care about disk device simply destroy it. A hammer or drill would be enough. If you want to preserve the device for further use then overwrite whole addressable space and don't worry about redundant sectors or cells which are present, but not addressable. Your enemy is neither KGB nor CIA, rather PFCSK.

--
Radoslaw Skorupka
Lodz, Poland




W dniu 08.11.2024 o 16:38, Mike Schwab pisze:
Not exactly explode.  Burn vigorously, yes.
https://en.wikipedia.org/wiki/Thermite

On Fri, Nov 8, 2024 at 9:16 AM WILLIAM FAIRCHILD
<00000734ac09691b-dmarc-requ...@listserv.ua.edu> wrote:
And if the 2 Al has been ground finely enough to turn into nanoparticles, then 
adding almost anything to it (along with an open flame) will explode, 
especially something like Fe2O3 (which will help it explode with all those 
atoms of oxygen).

Bill Fairchild
Columbia, South Carolina
USA

Awareness is the precursor to change.

On 11/06/2024 7:02 AM EST Seymour J Metz <sme...@gmu.edu> wrote:


Fe2O3 + 2 Al → 2 Fe + Al2O3

--
Shmuel (Seymour J.) Metz
http://mason.gmu.edu/~smetz3
עַם יִשְׂרָאֵל חַי
נֵ֣צַח יִשְׂרָאֵ֔ל לֹ֥א יְשַׁקֵּ֖ר



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From: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> on behalf of Paul 
Gilmartin <0000042bfe9c879d-dmarc-requ...@listserv.ua.edu>
Sent: Wednesday, November 6, 2024 2:55 AM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: Wiping old magnetic disks (Was Re: OFF TOPIC - DELETING ALL FILES 
SOFTWARE FROM A LAPTOP)

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On Tue, 5 Nov 2024 18:40:54 -0500, David Spiegel wrote:
    ...
The solutions being discussed were to cut the tapes such that after
cutting 2 thinner circles would result or to cut the tapes such that 2
semicircular pieces would result.
    ...
Why were no thermal alternative processes considered?
Environmental impact?

It's easy to find images of a disk with a couple bullet holes.

--
gil

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