On 1/10/08, Derrick Ryalls <[EMAIL PROTECTED]> wrote: > > Perhaps I need to re-evaluate my line of thinking. Light sometime > flicker, but power almost never goes out. When it does it is either > back on in less than 1 minute, or out for hours. If the UPS detects > critical correctly and gives me at least a minute before death, then > that should be plenty of time for the system to auto-shutdown. Guess > I will have to do some experimentation tonight.
While you experiment, keep in mind the following sequence of events: -- Power fails -- UPS signals low battery -- System shuts down -- Power returns before UPS shuts itself down --> System never reboots, because it never lost power. Getting around this is the tricky part. I haven't used NUT in about seven years, but back then the recommendation was to shut down to single user mode and run a script that delayed for some time longer than the remaining battery life of the UPS, then rebooted the system. There didn't seem to be an easy hook for running a script after shutting down to single user mode (maybe there is now). I haven't looked at NUT recently, but I expect the various flags that you are supposed to test are another way around this problem. - Bob _______________________________________________ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
