Make sure you have the proper hardware

The computer will have to have at least two unused hard drive interfaces i.e. IDE, SATA or as many as is needed for the desired size of the array. Also, like any RAID solution two or more empty drives of equal size will be needed. Personally, if buying new drives, I would recommend getting two or more terabyte drives. They seem to be the best bang for the buck in today’s hard drive market. The next step is to get the proper software.