Today, computer systems are applied in safety critical areas such as military, aviation, intensive health care, industrial control, space exploration, etc. All these areas demand highest possible reliability of functional operation. However, ionized particles and radiation impact on current semiconductor hardware leads inevitable to faults in the system. It is expected that such phenomena will be observed much more often in the future due to the ongoing miniaturisation of hardware structures. System software support of hardware efficiency. Igor Schagaev and Thomas Kaegi