I use a custome made programm which works only when the system hard drive shows up as "Disk0" and the RAID-0 disk (based on PCI-E card) appeares as "Disk1". I've just upgrated my OS from Windows XP Pro to Windows 7 Pro (hardware configuration is the same). After the first reboot the system disk shown up as "Disk0" in the "Disk managemet" which is fine, but when I installed the drivers for my RAID PCI-E card, the Windows 7 Pro rearrange the system drive to "Disk1" and the RAID Drive to "Disk0". Moreover when I put USB stick Win7 makes it as "Disk0" and puts my RAID as "Disk2". It never happend tike this in Windows XP environment. How can I rearange my "Disk0" and "Disk1" and lock them? Thank you in advance.