[Users] Unable to install oVirt Node 3.0.1: Exception: RunTimeError('Failed to partition/format')

Hi I am trying to install oVirt Node (ovirt-node-iso-3.0.1-1.0.2.vdsm.fc19.iso) on DELL R805 server, but every time install fails with Exception: RunTimeError('Failed to partition/format'). I also tried ovirt-node-iso-3.0.1-1.0.2.vdsm.el6.iso version and the same error occures. I tried different partition sizes and I always make sure that partitions dont exceed the total disk space. I browsed log fails and could not find anything relevant. I am really out of ideas... Any advise? Thanks Edgars