High availability and reliability are among the most desirable features of control systems in modern High-Energy Physics (HEP). One of the recent developments that has influenced this field was the emergence of the Advanced Telecommunications Computing Architecture (ATCA). Designed for the telecom industry it has been successfully applied in other domains. A good example is the application of ATCA standard for the design of Low Level RF (LLRF) control system for the X-Ray Free Electron Laser (XFEL) being developed in Deutsches Elektronen Synchrotron (DESY). Reliability and availability...