|Thanks for answer|
a whole 3Tb volume cannot be created on MBR partition it's why I use GPT.
All windows 7 support GPT and my friend's one too, I don't boot on that disk so what is the relation with win-32 ?
I said Dock HDD capacity limitation is what it seems to be. The HD dock is very new high tech dock which use/support USB3, I cannot believe it limit capacity at only 256Gb (it's like to return back 15 years before)
It's a very strange problem that no one seems to be able to explain v_v;
Do you know some tools to check MBR structure informations on a RAW volume to watch out the problem ?
I really want to understand what's happen, please help