The MB is X7DWA-N. I got 3 equal disks which were a dynamic Raid-5 based on Intel HostRAID. I want to create a Dynamic Raid-5 again in Windows 7 but it's greyed out in the context menu. I can create a mirror, stripped or spanned volume. But no Raid-5 volume. All disks are dynamic disks already and unallocated.
According to Microsoft, RAID-5 is only supported on computers running Windows 2000 Server, Windows 2000 Advanced Server, Windows 2000 Datacenter Server, Windows Server 2003 or Windows Server 2008 Operating Systems. In Windows 7, only hardware-based RAID is supported. Microsoft references: http://technet.microsoft.com/en-us/library/cc786912(WS.10).aspx#BKMK_WINUI