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.
1 (not countable) Actual or threatened force for the purpose of compelling action by another person; the act of coercing. ( law, not countable) Use of physical or moral force to compel a person to do something, or to abstain from doing something, thereby depriving that person of the exercise of free will.