updated update: Would selecting shutdown instead of reboot have anything to do with it? I notice casper-rw is mounted twice, once as aufs and again as /media/casper-rw. If I unmount /media/casper-rw it doesn't appear to have any affect.
Filesystem Size Used Avail Use% Mounted on aufs 2.2G 1.8G 330M 85% / /dev/sdb2 2.2G 1.8G 330M 85% /media/casper-rw -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/125702 Title: casper-rw fs not cleanly unmounted on persistent live USB shutdown -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs