umount: not coherent with fstab

[Luca Ferrari]

On Tuesday 22 May 2007 Tony Arnold's cat, walking on the keyboard, wrote:
> You can use the vol_id command to find the UUID of a file
> system/partition (man vol_id will tell you the details).

Thanks for the hint. I've chechekd my UUID and they are consistent with 
the /etc/fstab,  thus I cannot get why the error about the umount is 
displaying.

Luca