Thank you for your bug report. System settings have been divided into common and advanced settings. Please check if you have the advanded-button in the menu bar. if so, There should be the disks menu located in advanced.
Thanks Peter -- System -> Administration -> Disks https://launchpad.net/bugs/68976 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs