Comment 5 for bug 204844

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Martin Pitt (pitti) wrote :

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.