http://www.buildegg.com/bewp/?p=44
Hate the idea of possibly loosing all of your files if (and when) you hard drive dies? Considering implementing a mirrored array (RAID Level 1) for your important data. Most PC users today have two immediate options for building a mirrored array of hard disks: their motherboard's chipset and within Windows. This article focusing on setting up and managing a mirrored array by using Windows 7.