man this is seriously bad made in my eyes. I installed from CD now and now I have a mirror error and CANT INSTALL GRUB. I change back to freeNAS or NASforFree because there I dont have these issues and frankly there my HDs never failed. Running now the system on the 3rd HD (USB not included) and this cant be my fault any more. Really sick of this and I liked OMV very much.
Not to say, that I am really pissed off now.