i coulda sworn that SATA I was 150MB/s and SATA 2 was 300MB/s
I think alot of misconception comes into play when they lable the drives as being able to do 3.0Gb/s instead of GB/s meaning Gigabit rather than Gigabyte.
The hard drives, available in 80GB, 120GB and 160GB versions on an 80GB platter, run at up to 3GB per second. The drives have a 7,200 RPM spindle speed, 8.9 millisecond average seek time and an 8MB cache buffer.
The 3GB-per-second speed of the Samsung SATA II drives will be able to deliver a 300MB data rate on the bus.