Make a sata to usb data only cable?

I want to make a cable that is sata on one end and usb on the other for a laptop hard drive I only need data I have power all ready set up .on usb data is transfered with 2 pins and on sata with 4 pins  is their a way to interface this .

Sadly, no you can't do it, the protocols and signal levels are different. You could only do it with an "active" cable - ie one where some clever silicon is sneaked into the body of one the plugs.

Steve
Thankfully they are quite cheap;

http://dx.com/s/usb+sata

usb 2 for about 11 dollars
usb 3 for about 20 dollars.