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[Launchpad Bug Tracker <1265192@xxxxxxxxxxxxxxxxxx>]

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[Impact]

Serious data loss due to misleading UI in a variety of cases where the
installer fails to accurately assess or describe the current
partitioning layout.  This set of proposed changes fix the problem both
narrowly (by fixing a specific detection failure) and broadly (by being
more consistent and conservative about how automatic partitioning
methods are described, and by always displaying a confirmation dialog;
"are you sure?" dialogs are generally dubious, but in this case it
supplies more specific information which is a justifiable last resort
for an operation as potentially destructive as partitioning).  I have
taken care to ensure that it has no impact on translations.

[Test Case]

Validating this ideally requires exploratory testing, but simple tests
include setting up partitioning layouts that include deliberately-
unrecognisable partitions and making sure that the installation process
only removes those in response to options that explicitly state that
they will erase the disk rather than merely erasing a single OS, and
that a confirmation dialog is always displayed.

[Regression Potential]

This involves partitioning logic, so be careful.  I've tried to keep the
changes as isolated as possible to the automatic partitioning page,
although the confirmation dialog change also affects the manual
partitioner.  It's worth checking that back/forward paths still work
correctly, as this took me several goes to get right.

Original report follows:

Brand new Samsung laptop with UEFI. I had installed 13.04 Ubuntu but on reboot I never saw the 'grub' style menu. It just kept going into Windows 8.1.  So I got the 13.10 version (64 bit) and choose "Reinstall Ubuntu" (That may not be the exact text)
It removed all the partiions including the recovery partitions. I do have a backup for the windows install, but I was very surprised that this happened.
On a positive note I now have Ububtu up and running on my machine.
This is not my first time with Ubuntu. I have installed Ubuntu alongside WinXp, Vista and Windows 7. I've used Ubuntu desktop for over 6 years.
If you would like me to try something to replicate this. .. I could shrink my existing partion make another one - reinstall and see if it whacks that one. I can do this now .. I'm still moving into this laptop so starting over is not so bad.

Steve Devine

** Affects: ubuntu-translations
     Importance: Undecided
         Status: New

** Affects: ubiquity (Ubuntu)
     Importance: Critical
     Assignee: Colin Watson (cjwatson)
         Status: Fix Released

** Affects: ubiquity (Ubuntu Trusty)
     Importance: Critical
     Assignee: Colin Watson (cjwatson)
         Status: Fix Released


** Tags: iso-testing patch verification-done
-- 
Install/reinstall wipes out all/other partitions
https://bugs.launchpad.net/bugs/1265192
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