Hello, I will be using an external usb drive for this. My mother board is 865pe neo2-p. I am not sure if more info is needed for this forum to HELP me out.  Thank you,Dimarrco.  Can you please make it clear what you are trying to do.  Hello, I am wanting to have a second drive that will basicly mirror the first. It should automaticly save to both drives at the same time. For backing up info, docs, program settings, ect. In case of virus or drive crash. Thank you for your time, Dimarrco How to set up Software RAID in windows XP Professional

Like most other hard drive and STORAGE options, RAID is managed through Windows XP's disk management window, found by right CLICKING on 'my computer,' then selecting 'manage' followed by 'disk management.' Windows XP Professional is only capable of creating RAID 0 striped arrays, while the various Windows Server operating systems can also create software RAID 1 mirror arrays.

If you indeed are using XP Pro, this is the only option you have with this OS.  RAID 0 stripes the drives (A RAID 0 (also known as a stripe set or striped volume) splits data evenly across two or more disks (striped) with no parity information for redundancy. It is important to note that RAID 0 was not one of the original RAID levels and provides zero data redundancy. RAID 0 is normally used to INCREASE performance, although it can also be used as a way to create a small number of large virtual disks out of a large number of small physical ones).

I'm not sure if there are (but probably there is) software out there that can do what you want it to do. 

Alan <><  I'm not sure using an external HDD for this is such a good idea...Patio, would you explain to me why not an extrenal drive for this set up? Dimarrco