Sorry Paul for my misunderstanding but I'm newbie and my english is bad. As I said time before I had already tried to set all the 6 mobo's sata ports with "hot plug" enabled but I still had no success, I mean I had tried to connect the fantec to each one of the 6 ports. As I already said the fantec power supply works because the fantec is properly recognized if connected via usb cable.
Due to that I thought it was the fantec's esata port the faulty because my mobo would work properly, I mean sata ports can be set that way ("hot plug"), and you said esata a sata signals are the same.

So if it's not the enclosure's esata port broken and the mobo works properly, what's the faulty, maybe this brand new esata-sata cable? Or maybe the fantec's power supply doesn't work and all the energy to boot and run an Ubuntu OS from the fantec was taken only from the usb3 port? Do you think it could be possible?