[Users] ovirt-node install hangs

Hi, I'm trying to install the ovirt-node iso image on a SATA disk and when it gets to the screen where it shows 25% completed the kernel hangs. I can't connect using a serial console to see what has happened. If I reboot using a usb linux disk I see that the SATA disk has been formated and the partitions that existed before disappeared, being there just one partition of type "ee" If I use a 8 GB usb pen-drive instead of the SATA disk, the installation comes to an end and I reboot but then I get some error about not getting /dev/mapper/by-name/Root and the boot fails to a dracut shell. Any ideas? BTW, this happens with both 2.5.1 and 2.5.2 Alex