Here's what's happening.
I havent been using hardware RAID on my motherboard, but since I got new disks today I changed from normal SATA to RAID and rebooted.
I set up the RAID, three disks, one of them for the OS, the two other RAIDED as one. Rebooted.
The Windows Server 2003 loading-logo shows up for a second and then, it hasn't even faded in completely, I get a blue screen, which lasts for 0.5 sec and then the computer auto-reboots and does the same thing again forever.
I thought this RAID stuff should be handled automatically by the hardware but seems like WinServer2003 is missing somehing.
If I change back to not using RAID but normal SATA mode I can boot back into the OS again.
What the hell should I do to not get the BSOD??