i think the point he is getting at is tht his mobo does not support sata II so he wants to no if using a sata II hdd would be a problem
in answer to THAT question, it uses the same plugs so i would assume that you can plug it in but it would not interface at sata II speeds
but then that doesnt matteer as no drive at the moment can actually saturate 300MBp/s, and sata I is no problem if it does indeedc work