[CentOS] Raid5 issues

So when I couldn't get the raid10 to work, I decided to do raid5. Everything installed and looked good. I left it overnight to rebuild the array, and when I came in this morning, everything was frozen. Upon reboot, it said that 2 of the 4 devices for the raid5 array failed. Luckily, I didn't have any data on it, but how do I know that the same thing won't happen when I have real data on it?

I kind of feel that the problem might be that I'm using SATA drives, and they probably tried to self-correct and error and took too long, and the raid controller assumed that it was a bad drive, and took it out of the array. The question is, is there anything I can do about it?

Russ