J´utilisais aussi fdisk jusqu´à ce que je lise la page de manuel justement. :o)
http://unixhelp.ed.ac.uk/CGI/man-cgi?fdisk+8
« Indeed, cfdisk is a beautiful program that has strict requirements on the partition tables it accepts, and produces high quality partition tables. Use it if you can. fdisk is a buggy program that does fuzzy things - usually it happens to produce reasonable results »