>> In the shutdown procedure that is initiated via shutdown -h +0 is there any >> point where the shutdown could be interrupted due to power coming back or is >> this the final command that always results in the machine being brought >> down? I looked through the scripts that are involved and found nothing. So >> my thoughts are that this is a safe place for the ups shutdown command. > > I haven't looked at the shutdown procedure recently, but the most common way > for an UPS to avoid a race condition when the power comes back is as follows: > once the UPS receives the shutdown command from NUT, it will always cut power > at the scheduled time, even if only momentarily. If line power has returned, > momentarily interrupting the UPS output will break the computer out of its > halted state. If not, then the UPS simply powers off the output, and waits > for line power to return. > > I admit that we haven't kept good records on which UPSes do this, but it is > fairly straightforward to test, and it should work on all but the cheapest > models.
Hi, this is exactly what I currently do. The question is if this nut shutdown script is the right place to put in the shutdown -h +0 or if I should use triggers or fiddle with the scheduler or ... and place it there. Cheers! -lutzn _______________________________________________ Nut-upsuser mailing list Nut-upsuser@lists.alioth.debian.org http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/nut-upsuser
