Thank you for the answer. I filled a bug here : https://bugzilla.gnome.org/show_bug.cgi?id=768031
** Bug watch added: GNOME Bug Tracker #768031 https://bugzilla.gnome.org/show_bug.cgi?id=768031 -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-disk-utility in Ubuntu. https://bugs.launchpad.net/bugs/1595927 Title: Impossible to format a USB who contains bootable ISO Status in gnome-disk-utility package in Ubuntu: New Bug description: When you try to format a bootable USB you have the following error : This partition cannot be modified because it contains a partition table; please reinitialize layout of the whole device. (udisks-error- quark, 11) and it's impossible to format. I think it's related to this bug : https://bugs.freedesktop.org/show_bug.cgi?id=76178 Here another bug details and temporary solution : http://askubuntu.com/questions/758219/how-can-i-delete-all-partion-of- my-pen-drive-and-create-a-single-volume ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: gnome-disk-utility 3.18.3.1-1ubuntu1 ProcVersionSignature: Ubuntu 4.4.0-24.43-generic 4.4.10 Uname: Linux 4.4.0-24-generic x86_64 ApportVersion: 2.20.1-0ubuntu2.1 Architecture: amd64 CurrentDesktop: Unity Date: Fri Jun 24 13:15:52 2016 InstallationDate: Installed on 2016-03-26 (90 days ago) InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Beta amd64 (20160323) ProcEnviron: LANGUAGE=fr_FR PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=fr_FR.UTF-8 SHELL=/bin/bash SourcePackage: gnome-disk-utility UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-disk-utility/+bug/1595927/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
