I have the same problem with mounting and umounting my Lacie drive.
This is not a bug fix but a compromise I found.
I tried messing with my /etc/fstab file and was unsuccessful. I found, however, that my /etc/mtab file recognized my drive as /dev/sdb1 which I was able to painfully unmount with
sudo umount /dev/sdb1
Since I dont want want to write that command all the time I added the line
alias unlacie='sudo umount /dev/sdb1/'
to my .bashrc file so that I may unmount it with unlacie and my password. Not the nicest solution but at least it seems to be a clean unmounting.
I have the same problem with mounting and umounting my Lacie drive.
This is not a bug fix but a compromise I found.
I tried messing with my /etc/fstab file and was unsuccessful. I found, however, that my /etc/mtab file recognized my drive as /dev/sdb1 which I was able to painfully unmount with
sudo umount /dev/sdb1
Since I dont want want to write that command all the time I added the line
alias unlacie='sudo umount /dev/sdb1/'
to my .bashrc file so that I may unmount it with unlacie and my password. Not the nicest solution but at least it seems to be a clean unmounting.