Doesn't remove old partition record from /etc/fstab after formatting

Submitted by Petr Kopac

Description

How to reproduce:

delete an NTFS partition on secondary disk (rewrite with zeroes).
put there EXT4 partition instead.
reboot computer => ubuntu doesn't boot, allows only single-user mode.

By checking system log, I found out system was trying to mount the old NTFS partition and hanged on it, even though that is not at all a necessary partition. Then I checked /etc/fstab and found out the GUI tool did NOT remove the original record, when it deleted the partition on the drive.

By commenting it out I was able to get into the GUI again.

Ubuntu 15.10 pkg: gnome-disk-utility 3.16.2-0ubuntu2 0

The original line, that was left behind: UUID=52D09468D09453D7 /backup ntfs defaults,umask=007,gid=46 0 0

The new line that the tool created: /dev/disk/by-uuid/414e95a1-fb40-45a6-9b90-487a45337fdd /extdata auto nosuid,nodev,nofail,x-gvfs-show 0 0

ProblemType: Bug DistroRelease: Ubuntu 15.10 Package: gnome-disk-utility 3.16.2-0ubuntu2 ProcVersionSignature: Ubuntu 4.2.0-30.35-generic 4.2.8-ckt3 Uname: Linux 4.2.0-30-generic x86_64 ApportVersion: 2.19.1-0ubuntu5 Architecture: amd64 CurrentDesktop: Unity Date: Thu Feb 25 08:34:50 2016 EcryptfsInUse: Yes InstallationDate: Installed on 2016-02-24 (0 days ago) InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021) SourcePackage: gnome-disk-utility UpgradeStatus: No upgrade log present (probably fresh install)

Version: 3.16.x