Please make sure before this installation, you will need 2 identical hard disk with same space connected to the server. But the truth is, you don’t need to same hard disk with the same space amount, but as long as you partitioned the space equally then it would be good as well. But for beginner, it is better to get a hard disk that got the same space quantity, less percentage that you would get yourself confused.
Below are the steps on how to enable the Software RAID inside Windows Server 2003:
1) You may follow the initial windows setup here:
2) After the installation has finished, click on Start button and right-click on My Computer. Select Manage and click on it:
3) Next is to select Disk Management: