你好∼
在下剛好有試過，分享一下個人的經驗。
測試軟體：HD Tune 2.52
測試平台：AMD Athlon 64 X2 3800+, Asus a8v deluxe, Promise FastTrak 378 (onboard chip)

單顆 seagate barracuda 7200.7 120G
Minimun: 28.4; Maximum: 56.0; Average: 44.7; Access Time: 14.5;Burst Rate: 76.8; CPU Usage: 3.5%
2顆 seagate barracuda 7200.7 120G Raid0
Minimun: 41.6; Maximum: 81.2 Average: 70.9; Access Time: 14.9; Burst Rate: 1241.1; CPU Usage: 4.6%

所以應該是Seagate 7代本身的性能限制吧！