There is a golden rule when it comes to SATA I / II :
"Nothing depends on the HDD itself. The MOBO is the only factor to be seen"
What I mean is, if I got an old pre-SATA II HDD, and used it in a new MOBO with SATA II, it would be enabled. But if I got a brand new drive and used it with an old no SATA II MOBO, it would automatically assume the SATA150 bus.