[Bug 1462632] Re: "Editing" unknown partition to Crypt to see if crypt detected instantly destroys what was there, "Quit" does not revert

[Phillip Susi]

That is exactly how it works; it doesn't touch the disk until it you
click proceed.  It only shows you what it is *going* to do.

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https://bugs.launchpad.net/bugs/1462632

Title:
  "Editing" unknown partition to Crypt to see if crypt detected
  instantly destroys what was there, "Quit" does not revert

Status in ubiquity package in Ubuntu:
  Incomplete

Bug description:
  In the graphical desktop installer, "Editing" unknown partition to
  crypt to see if LVM or crypto is detected instantly destroys what was
  there, "Quit" does not revert: https://i.stack.imgur.com/p0SWz.png

  This is a horrible thing to do because:
  1.) why would you not detect LVM in the first place
  2.) why is there no warning that you're just destroying data. Not that you don't even have a proper commit system (every partitioning tool I have seen except command line DOS stuff will let me try changes first, then APPLY them when I choose so AFTER A WARNING), but there is no warning at all
  3.) you do even have a revert button, but clicking "Quit" apparently doesn't trigger that and my partitions are left broken

  TL;DR: I tried to make it detect my LVM, quitted with "Quit" since
  apparently it can't, and now my LVM is gone forever.

  1995 is calling and wants its horrible partitioning GUI back!! Also,
  thanks for wasting all my data.

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