[Nut-upsuser] Synology NAS is shutting down Ubuntu servers after very brief power outage (fwd)

Todd Benivegna todd at benivegna.com
Mon Aug 10 12:17:53 BST 2020

Hi Roger,

Here is the /usr/syno/bin/synoups file




Todd Benivegna // todd at benivegna.com
On Aug 9, 2020, 4:49 PM -0400, Roger Price <roger at rogerprice.org>, wrote:
> On Sun, 9 Aug 2020, Todd Benivegna wrote:
> > upssched.conf (on Synology):
> > CMDSCRIPT /usr/syno/bin/synoups
> >
> > upssched-cmd (on Synology):
> > I don’t see this file.
> The CMDSCRIPT declaration says that in a Synology box the file that NUT calls
> upssched-cmd is called /usr/syno/bin/synoups. Could we see this file? Thanks.
> > What is "Safe mode"?  Is it complete power down?, or some sort of hibernation?
> > If it's not a complete power down, how is the hibernation powered?
> >
> > "When the Synology NAS enters Safe Mode, it stops all services and unmounts volumes in order to prevent data loss and shut down (halt for
> > EDS14) safely when the UPS device runs out of power. By default, the system enters Safe Mode when the UPS device starts running low on power.
> > You can also specify the amount of time before the Synology NAS enters Safe Mode when power failure occurs. However, if the UPS device reaches
> > low battery before the specified time, the system enters Safe Mode immediately.
> >
> > In situations where the Synology NAS shuts down during Safe Mode, it will automatically turn on when power is restored if you have enabled the
> > Restart automatically after a power failure option (located at Control Panel > Hardware & Power > General)."
> This reads like typical sales literature. I admit to being none the wiser even
> after reading it several times.
> > I gather this puts it in a state where it is ready for imminent power loss and
> > won’t damage or lose any data.
> How long can this last? Who supplies the power to the NAS during "Safe mode"?
> > Ok, I will comment that back out.  That won’t interfere with anything?  What
> > user would it run as?  Will it have access to upsmon.conf?
> Ubuntu very probably has user nut set up to run NUT and has the permissions set
> accordingly. If it's possible to execute "command ps -elf | grep nut" in a
> running NAS you will see user nut in action.
> Roger
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