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Re: Securely wipe laptop hard drive
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From: |
Jeffrey Walton |
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Subject: |
Re: Securely wipe laptop hard drive |
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Date: |
Sat, 25 Sep 2021 02:08:49 -0400 |
On Sat, Sep 25, 2021 at 1:40 AM jedenfalco <jedenfalco@protonmail.com> wrote:
> ...
> > It can't, because that's not how shred works. Recursively shredding
> > files within a larger filesystem does NOT guarantee that the old file
> > is wiped out, because modern file systems tend to write the new file
> > to a different part of the block storage while leaving the old storage
> > unchanged other than marked as unused; with the right software, it's
> > fairly trivial to read the contents of those areas of the disk. ...
>
> Could it work on a specific partition?
As Eric explained, it depends on the disk but the answer is likely no.
For solid state drives see "Reliably Erasing Data From Flash-Based
Solid State Drives,"
https://www.usenix.org/legacy/events/fast11/tech/full_papers/Wei.pdf.
Jeff