The Fedora 20 repo includes a utility called 'scrub' and it has a mode to scrub free space.

On Sun, Nov 16, 2014 at 2:04 PM, jd1008 <jd1008@gmail.com> wrote:
Before sending the drive for warranty service, what is the best way to
clean the unallocated blocks?

The rest of the files on disk are OK - standard installation, ... etc.
All home dirs are deleted, tmp dirs, logs ....etc all deleted.
If you can think of other things to delete, pls let the world know.

Thanx.


Thanx.
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