I recently bought a new AMD Dualcore 6400 barebones system. Not realizing the motherboard it came with only had one IDE channel, I wound up purchasing a 500gb SATA drive to replace the 100 & 120gb drives I previously had. The issue is installing Windows XP on the 500 SATA and using it as a primary boot drive. I had it running in a matter of minutes, but using only 131 GB of the drive capacity, I read somewhere about slipstreaming the drive with the raid drivers at XP's initial setup. That is a whole nother story in itself, but was done. BIOS and XP that is installed on the 120gb drive read the drive as a 500 GB drive. The WD LifeData tools that the drive came with, easily allows me to partition and format the drive into five 100gb drives. But upon installing XP, it only comes up as a 131gb drive and says it needs to be formatted. Thus turning the drive back into a 131 gb drive with a 370 gb loss. Then I read I need to make the disk active in XP's DiskManagement. DiskManagement, again allowed me to re-partition the drive, but only into 4 partitions, (one 100 and three 125's (465gb available)) reformat the drive and make it "active". Then to install XP on the first partition XP setup show the drive as a single 131gb drive (even though it's partitioned as 100gb) and needs to be formatted. What the hell gives? is XP setup anable to see a partitioned drive biger than 131gb or is there a step I'm missing?