Raid Level 0 = PERFORMANCE, you need a minimum of 2 drives Raid Level 1 = BACKUP (mirroring), you also need a min of 2 drives Raid Level 0,1 = is a combination of the above, you need 4 drives There is plenty of other raid-levels, but the one for you would be "Level 0". One more thing you will have to think about is whether you make a hardware raid or a software raid. Hardware Raid: Uses a raid controller (some mainboards have one built in e.g. ASUS P4PE or P4C800, or you get a PCI-card). This is the expensive method, but it has a better performance. Software Raid: You can use Windows' integrated software raid functions. Windows XP Pro supports Raid 0. Other raid levels are only supported on server editions. It the inexpensive method (no cost, exept a hdd), but it also shows lack of performance in comparison to a hardware based raid. Raid Info