Hi all, I hoped this forum would help me solve my raid problem but it seems to be trickier than I thought. I've been trying to install XP on a SATA raid array with no success so far. In a nutshell: I created a CD as described by Fernando Windows installs normally on one of the disks (NO RAID mode) but as soon the disks are mounted as a RAID array, XP installs but endlessly reboots before GUI mode In detail: What I've done: - install CD = XP PRO SP3 rev 5512 + Nvidia nForce 430 latest version found on NVIDIA website (included /SATARAID + /SATA_IDE) - used latest nLite version - PC BIOS updated to latest revision (Media shield v 6.50) - Array created, bootable and healthy - removed all unnecessary hardware : all PCI cards, CD and DVD drives, floppy, even keyboard and mouse (this is cuz i read that reboot at mup.sys was a hardware-related problem) - set all BIOS settings to default (except raid of course) What works: - the installation CD seems correct; when I do a NO RAID install, the drivers are correctly installed in windows even if shown as not digitally signed. Everything works well. What doesn't work: install with the same CD on a RAID: windows installs normally, seems to boots, but reboots in safe mode rebbot occurs right after displaying mup.sys i get no blue screen or error code, just a reboot. My Hardware: ASUS M2NPV-VM disks: Seagate ST160811AS + ST160815AS (exact same capacity) Conclusion: My understanding is that it is clearly a RAID - related problem because: - the CD is correct - everything goes fine when not in RAID mode The raid array can be read/written by windows (it installs on it). But i don"t understand why the system reboots as the drivers are correctly installed (at least i think so) Does anyone have any idea what the problem could be? thanks!