Using Ubuntu 11.10, how do I format an external or USB drive? I don't find an option to 'format' when I right click. In the new version, the drives don't come up on the desktop but instead come on the Launcher.
My error was caused by util-linux(in buggy version 2.20 since 2012), which is needed by udisks, which is the package used by gnome-disks to format USB drives, which is the tool used by the "Format" option in the Nautilus context-menu.
The bug is reported here and here. It has not be solved since 2012.
Thats a bummer...
EDIT : and if you want my advice, DO NOT try to build util-linux yourself^^ I just did, following all recommendations and without any warnings, and I bricked my system.