Hi everybody!

I try to mount a partition in ext4, and i was following this french thread :
http://forum.ubuntu-fr.org/viewtopic.php?id=383127

but, i was stuk at 2 line (of command) next the end....
It was possible to view the /media/video in ext4, but it was impossible to write on it...
And i saw a folder in /media/video, is name was lost&found, like the home folder, before the user....

And after i was bored of this so i start Gparted, unmount, format in ntfs format...
(cuz it just for data...)

Now each time i reboot, the system stop, and i need to press F1, to see a message that display my raid device ok, and an other message to skip /media/video or mount manually.....But this /media/video doesn't exist at all cuz i format it! But i think somewhere there some piece of it??
And i can't unmount it, cuz it not mount anymore, but the system still recognize it!!??

I'm using kubuntu 12.10...
What do you think?

Thank!