When booting the live CD, udisks indeed gets inhibited while the ubiquity greeter runs (which allows you to choose the language and select install/live desktop).
So this explains why udisks is inhibited 30 seconds after it start up; SMART data collection is not reattempted in this case. ** Changed in: udisks (Ubuntu) Status: Triaged => In Progress -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/580112 Title: does not collect SMART data on live system -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs