Public bug reported:
I'm using Ubuntu 16.04 dev with secure-delete 3.1-6ubuntu1 and because
of the techniques used by SSD's like wear leveling and reserve blocks it
is very difficult to reliably delete the remaining free disk space
without deleting the existing data. But secure-delete could try various
things (potentially configurable) to lower this issue as much as
possible:
- For example it could try to detect the amount of reserve blocks/make a
pessimistic assumption/lets the user control the amount and calculate how much
write cycles would be needed to go relative sure that all free blocks including
reserve blocks are deleted.
- Alternatively/additionally dependent on what features the SSD is capable of
(like temporary disabling of the wear leveling) they could be used more or less
to the advantage.
** Affects: secure-delete (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1559407
Title:
Ability to securely erase the free space of SSD's as much as possible
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