With the Intel chipsets that have an ICH7-R or ICH8-R Southbridge (The "R" is important, since it stands for RAID support), the Matrix Storage Manager will help you to upgrade single drives into a RAID 0 or RAID 1 after installing an additional drive.
Now you can create a RAID volume.
It won’t take longer than 30 minutes to migrate from a single hard drive configuration to a RAID setup.