Citeren Rainer Fuegenstein <[email protected]>:
[...]
there's one more thing that came to my mind, but this is also true for some APS UPSes IIRC: assume that the NUT daemon is configured to shut down the server at 1.52 volts. but 30 seconds later the sun comes up and so does the voltage as the battery re-charges, causing the SCD to not cut the power (which it would have done at 1.50V). this means that manually pushing the power button is required to power on the server again.
We don't like that. Looking at the hefty battery capacity, I would figure that this setup is supposed to be used in a remote location with possibly nobody around to do that.
or: kill all services and unmount all filesystems at 1.52V (so that a sudden loss of power doesn't do any harm), but keep monitoring the SCD until voltage raises to 12.0V, then restart all services or reboot.
This is probably the only way to deal with this. The battery could stay at the 10.52 V level for hours (maybe even days or weeks when you're close to the polar circle), so it isn't possible to assume that a 'power outage' is over after a couple of minutes and it is safe to restart. So you'll have to keep monitoring the input voltage until either the power is cut by the SCD or the voltage is high enough to power the system again.
Best regards, Arjen -- Please keep list traffic on the list _______________________________________________ Nut-upsdev mailing list [email protected] http://lists.alioth.debian.org/mailman/listinfo/nut-upsdev
