The kernel ordering of /dev/sdX devices is not necessarily deterministic. When booting the Hypervisor using PXE with the storage_init parameter set to a /dev/sdX device it was therefore possible to accidentally delete data from Red Hat Enterprise Virtualization storage domains.
Additional safe guards have been added to check that the device specified in the storage_init parameter does not contain a storage domain. Installation is blocked where this is the case. To use the storage_init parameter in a deterministic manner specify devices using the paths presented under /dev/mapper/ instead of paths of the form /dev/sdX.