A SATA connection is a serial connection, and the data connector has four lines: two for the signal (one each way), and two for power (hot and neutral). SATA cables have smaller connectors, and the wires are housed in a protective sheath that's about 1/6 (rough guess) of the width of an ATA ribbon cable. In addition, SATA technology allows for much faster speeds than ATA was going to be able to allow.
Adj. 1. coercive-serving or intended to coerce; authority is directional instead of coercive. powerful-having great power or force or potency or effect; the most powerful government in western Europe; his powerful arms; a powerful bomb; the horse's powerful kick; powerful drugs; a powerful argument.
If you use coercive measures to get people to join your club, it means that you intimidate or force people to make them feel like they have to join. If you use threats to get what you want from other people, your methods can be described as coercive. It can take nothing more than a strong sense of authority to come across as coercive, or the intimidation can take the form of physical threats.