The Study of System Availability with Reboot Delay

This paper extracts the availability of a warm standby system with reboot delay and switching failures. The system is studied under the assumption that the time-to-failure and the time to repair of the primary and standby units are exponentially and generally distributed, respectively. There is a possibility of failures during the switching from standby state to primary state. Reboot delay happens in this switching procedure of a standby unit to primary unit. The reboot time is assumed to be exponentially distributed. It is assumed that there is a significant probability of a switching failure. Primary and warm standby units can be considered to be repairable. Using the supplementary variable technique we develop the explicit expressions for the steady state availability.