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
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