我查到了，原文如下：
The Barracuda ATA IV was designed for optimal performance in desktop systems. Because of the optimization for this environment, the performance in some RAID 0 applications is less than ideal. The performance in random access reads or writes is among the best in its class. However, when configured in RAID 0 where long sequential reads are the norm, the optimization for the desktop environment negatively affects the performance. We are investigating a solution that would improve the performance in RAID 0 without degrading performance in desktop systems.If a solution is found, it will be made available. In the meantime, the problem can be overcome by installing the drives on separate channels or separate controllers. While this may not be feasible in all situations,it is one method. At this time, there are no plans for a firmware change for this issue, however, we are always working to improve our firmware,and this is an area we are looking at very closely for future products.