Public bug reported: I am running Ubuntu 14.04 on a computer with three harddisks. I need to install 16.04 on a specific disk so I disconnected two of the three disks and booted the 16.04 install via USB (EFI).
The disk in question at that time hosted an encrypted LVM volume with data only which I was able to mount in the 16.04 live system using Nautilus (but not access, possibly due to mismatching user IDs). I started the installer on the desktop and selected to install updates and encrypt the system. I clicked through UNTIL the point where an additional popup window told me that it would now format the disks with the following layout (...) if I proceed. At that point I backed out and clicked "Back" several times, going back several steps until the point where I could choose whether to use LVM and encryption. Then I closed the installer. At that point, my target disk - which held a data partition before - was already formatted although I had backed out of the installer: Medium /dev/sda: 465.8 GiB, 500107862016 Bytes, 976773168 Sektoren Gerät Start Ende Sektoren Größe Typ /dev/sda1 2048 1050623 1048576 512M EFI System /dev/sda2 1050624 2050047 999424 488M Linux filesystem /dev/sda3 2050048 976771071 974721024 464.8G Linux filesystem I am *100% sure* I did *not* click on "Proceed" at the prompt where the partitioning layout was shown. Please try to reproduce this, if it is reproducible it is a serious bug. ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: ubiquity 2.21.63 ProcVersionSignature: Ubuntu 4.4.0-21.37-generic 4.4.6 Uname: Linux 4.4.0-21-generic x86_64 ApportVersion: 2.20.1-0ubuntu2 Architecture: amd64 CasperVersion: 1.376 CurrentDesktop: Unity Date: Sun May 29 19:33:32 2016 InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz.efi file=/cdrom/preseed/ubuntu.seed boot=casper quiet splash --- LiveMediaBuild: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1) ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash SourcePackage: ubiquity UpgradeStatus: No upgrade log present (probably fresh install) ** Affects: ubiquity (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug ubiquity-2.21.63 ubuntu xenial -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1586825 Title: installer formats disk although I backed out! To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubiquity/+bug/1586825/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs