This is pretty quick, assuming you have torx that will fit. Be aware most platters I have seen recently are like a glass, so if you try to bend them, they shatter into happy-little-shards, and I mean LITTLE SHARDS... not bent metal platters of old. 
The alternative is a single Linux command if you have never taken one apart and rubbed 99% isopropyl alcohol all over the platter(s) with your fingers (I have always assumed that this speeds over-oxidation and smears any fingerprints over the surface evenly, or a nail scraped back and forth along the platter surface on both sides repeatedly
and the quickest I have found to boot to the cli is Slackware): dd if=/dev/zero of=/dev/sd[x] bs=1M
"sd[x]" would usually be whatever port it is plugged into SATA port 1 would usually be /dev/sda, SATA port 2 would be /dev/sdb, etc. An "fdisk -l" will tell you what drives are detected.
Might be work researching:
Brute-force I assume would be quick on something local compared to remote/wireless data.
I personally have never done this on anything but a .pst file before, but where there is a will...

The alternative is a single Linux command if you have never taken one apart and rubbed 99% isopropyl alcohol all over the platter(s) with your fingers (I have always assumed that this speeds over-oxidation and smears any fingerprints over the surface evenly, or a nail scraped back and forth along the platter surface on both sides repeatedly
and the quickest I have found to boot to the cli is Slackware): dd if=/dev/zero of=/dev/sd[x] bs=1M"sd[x]" would usually be whatever port it is plugged into SATA port 1 would usually be /dev/sda, SATA port 2 would be /dev/sdb, etc. An "fdisk -l" will tell you what drives are detected.
Might be work researching:
Brute-force I assume would be quick on something local compared to remote/wireless data.
I personally have never done this on anything but a .pst file before, but where there is a will...

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