Is this partition in your /etc/fstab? If so, you cannot unmount it as normal user.
If it is not in your fstab, please copy&paste the output of gnome-umount -vbd /dev/sdb2 and do lshal > /tmp/hal.txt and attach /tmp/hal.txt here. ** Changed in: gnome-mount (Ubuntu) Status: New => Incomplete -- Cannot unmount volume https://bugs.launchpad.net/bugs/204844 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs