Today I tried out installing Windows Server 2008 on my cube server. When I reached the dialog to choose on which partition I want to install to, I always received the following warning "windows is unable to find a system volume that meets its criteria for installation". The partition had enough room space (40GB), formatted in NTFS, marked as primary and boot, etc.

After some research I ended up to the following article (KB927520). I tried a lot in the BIOS and partition settings but nothing helped. On the TechNet forum I saw the following thread with the same error and most of them solved the problem by physically unplugging all additional drives! On my cube I have an Areca RAID controller and a separated drive for booting the system. Unplugging my raid controller was the solution, duh!