Well, I was loosing hope, but the zeroing was completed for 4 and a half hours.
I had to remove an HPA partition that starts a demonic script for partitioning your hard disk - it is related to DELL MEdia Direct. If you delete the latter it might still nuke your lap top by repartitioning it - it has a stand alone button next to the power on button.
Now pressing it flashes the media direct picture and startd grub
...
After difficulty there is relief ...
Next time I'll do some random erase - but the point was the Host Protected Area where is the boot for the media direct...I won't give Media Direct any chance to reapear ... now I am a happy user of Fedora 9!
Thanks for your response, unfortunately I was already running the zero command when I posted the topic.
Cheers.