Good day. I recently helped a friend of mine out with his new hardware, and tried to set up his two new identical 1 TB drives in RAID 0 for him. Having never messed with RAID but being very experienced with hardware, I figured it would be no big deal to figure it out for him. Anyway, I set the drives to RAID in the bios, and added each disk to a striped configuration in the RAID utility. I then proceeded to install x64 XP (using an nLited copy of XP x64 with the intel RAID drivers slipstreamed), and realised once I was at the desktop that Windows was showing a single drive, but with a total size of 2 TB. This does not seem to make any sense, as it was my understanding that the size of two 1 TB drives in a RAID 0 configuration would be 1 TB. Any thoughts? The system is on a brand new Asus P6T motherboard and the two drives are WD Caviar Black 1 TB models.
It sounds like you have RAID 0 and RAID 1 confused. RAID 1 provides redundancy at the cost of one HDD, whereas a RAID 0 is fundamentally like 1 very large, very fast disk which provides no redundancy. Hope this clears things up for you. If not, you might want to read Wikipedia's article on various RAID levels: RAID - Wikipedia, the free encyclopedia
