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PASANITY is a system parameter that controls whether the CI and DSSI port sanity timers are enabled to permit remote systems to detect a system that has been hung at IPL 8 or above for 100 seconds. It also controls whether virtual circuit checking gets enabled on the local system. The TIMVCFAIL parameter controls the time (1-99 seconds). PASANITY is normally set to 1 and should be set to 0 only when you are debugging with XDELTA or planning to halt the CPU for periods of 100 seconds or more. PASANITY is only semidynamic. A new value of PASANITY takes effect on the next CI or DSSI port reinitialization. If CI or DSSI devices are not configured on your system, this parameter is ignored.