On Jan 10, 2008 3:14 PM, Bob Johnson <[EMAIL PROTECTED]> wrote: > 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.
At which point, you either hit the power button manually, or you telnet/ssh/web to your contollable PDU and tell it to remove power from the outlet(s) for 10 seconds. Kurt _______________________________________________ firstname.lastname@example.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"