[ovirt-users] Software Raid not possible in oVirt Node 4.0 ?

Hello together, I tried to install the new oVirt Node 4.0 from: http://resources.ovirt.org/pub/ovirt-4.0/iso/ovirt-node-ng-installer/ Mostly of the configuration in the installer is the default settings, expect that i wan't to setup a software raid 1, with the two disks on the server. I have done this before with CentOS 7.3 installation and this parition setup worked as expected. But here with the Node Installer , it failed. A screenshot of the Error message attached. Is this not supported at the moment? Or is their a special setting, which i missed for the Node 4.0 ? Or is this perhaps a bug? For reporting https://bugzilla.redhat.com/enter_bug.cgi?product=ovirt ? Greetings Roger Meier