Ok, so good news, you were totally right about that crappy dockstation controller ! I still got input/output errors on read and on write while tempting to create a partition table or simply trying to create a partition. I'm just making a low level format right now using the method i found here : : http://linux.m2osw.com/low-level-formatting-hard-drives (tried with dd count=nbBlocks if=/dev/zero of=/dev/sda but it was'nt working so i'm trying with cat cmd)
If everything is going good it'd be good tomorrow or in 1 day (1 day it's working so i'll let it work until friday). Otherwise, if i still can't create a partition table or a partition, i'll resend it to Amazon for a new one.