you mean ATA interface. the fastest way is to just look at the hard disk by opening up your computer case. another way would be....well i don't know. possibly motherboard monitor could find out this info or sisoft sandra. oh.... i think an even easier way is go into CMOS setup, read off the model number from it and look up that number on google.
oh wait....an even easier way is goto "my computer" right-click on the disk. select "properties". read off the model number. search google. yup, sounds like that should be the easiest way. if you cannot find it give me the model number and i'll look it up for you. i do not need your computer model number, just the hard disk model.