scrub, in the Fedora repos, has a fillzero option and a freespace specifier that should do the trick. MAKE A BACKUP FIRST, as scrub's primary job is to erase any trace of everything on a device, so you'd hate to get the options wrong!
On Wed, Sep 4, 2019 at 4:41 PM ToddAndMargo via users < users@lists.fedoraproject.org> wrote:
On 9/4/19 1:25 PM, ToddAndMargo via users wrote:
On 9/4/19 2:44 AM, Patrick O'Callaghan wrote:
The point of Eyal's method is to ensure that all the free space on the drive is filled with zeroes, thus improving the compression. Otherwise you are just uselessly compressing junk.
poc
Is there a way to tell the stick itself to zero out all unused space?
This sounds like what I need:
https://manpages.ubuntu.com/manpages/trusty/man8/zerofree.8.html
Am I on the right track?
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