• 16 Posts
  • 22 Comments
Joined 3 years ago
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Cake day: January 3rd, 2022

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  • Due to my understanding of it, I was hesitant to use AC recovery in the case that the power goes down more than once in a short period. It could drain the UPS to the point that it might not be able to sustain enough runtime for a proper shutdown. But I’m also a bit confused about the setup here. If the server is sent a signal to shutdown due to a grid outage, who is telling it the grid was restored? The server would always detect power because of the battery backup, so I don’t think AC Power Recovery would work in this case, no? I believe I have the UPS comm server (probably apcupsd) installed on the server itself, so there’s no way for it to know to wake up unless from an outside source.

    Maybe you have some further incite into how to make that setup work properly.

    I’m brainstorming here, but would it be possible/feasible to have the Unifi Dream Machine execute a script everytime it turns on telling the server idrac to power up. I’d have to see if the UDM has that ability as well. The UDM turning on would only really happen if power was restored from an outage. Otherwise I could send a command manually once I have access to the network.







  • I’ve had the IP for a couple of years so I can rule that out. The only thing different than usual is I recently added a backup server to the VPS network. I’ve been doing a remote backup from one server through the VPS to the backup server over the past week. It’s a 4TB backup averaging 4MBps.

    My guess is that the VPS provider’s algorithm is bungling the bandwidth calculations, possibly refreshing the bandwidth amount incorrectly which to the black hole detector appears as a sudden spike in bandwidth rather than a steady flow.

    I’m going to keep running the backup and compare how long after the backup starts that I get a black hole trigger. If it’s relatively consistent then that might be the problem.