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Bug#678015: debian-installer: Guided partitioning took 26 hours to complete erasure of encripted LVM volume

On Mon, Jun 18, 2012 at 01:40:23PM -0300, Fernando J. Rodríguez wrote:
> Please consider: a) changing the erase algorithm for someting more
> expeditive, even at the expense of some effectiveness; b) asking the user if
> she actually wants to erase the contents of the newly created volume; c)
> warning the user that the erasing could take more than 1 day.

The latter probably makes sense.  I'm pretty sure that the user is asked,
because I always skipped it.  On the other hand it's not for pre-existing data
to be wiped but for the encrypted volume to appear completely random.
Otherwise it's pretty obvious which blocks are allocated and which are not.
(Not sure how useful that information is.)

It's not about effectiveness but about security, sadly.

Kind regards
Philipp Kern

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