Hey guys, I was looking at my hard drive and saw that it says 1.5/3.0 on the hard drive. There is a jumper blocking 2 of the pins, so I can only get 1.5
The simple answer to that is Sata II drives come with the jumper set to default. That enables all modes while moving the jumper changes the maximum to a different mode.
I wouldn't get bent out of shape anyways since the ATA limitations are still seen on Sata drives even while being on a faster bus simply due to hardware constraints at the present time. A new type of storage method would be the means to see the real benefit of the faster bus if another wasn't already developed for anything new by that time.