>this brings me to the idea of sample-intervals. what is the monitor counting >for a 3 minute down-time in the worst case ? >-ulrich- IAMUP EXEC is executed once every hour - it can't possibly measure an interruption that small. Reduce that to every half and hour, and the problems with downtimes will go away :) (it will count it twice, and you may end up with a negative downtime) Glad to hear Eric on EARN issues! -turgut