Shedding power

Tuesday, January 16th, 2007 at 9:29 pm

This afternoon there was a mass power outage that affected most of the state.

So how did this affect me?

Firstly it made the ride home interesting as I pass through a couple of major intersections that turned into a free-for-all as there was no power for the traffic lights. I had one near miss while crossing Ferntree Gully Road when a car decided to floor it through two moving lanes of trucks…

Secondly I was able to see how long the UPS I got for free would last which I can determine from the MRTG logs on preston (my linux box that was the only device running from the UPS):

  • My router last responded at 4:10PM. This gives me a five minute window (until 4:15PM) for when the power went out.
  • The last uptime entry (i graph the system uptime in seconds) was at 16:55PM, again with the five minute window.

This means that the UPS powered preston for between 40 and 50 minutes until the batteries ran flat. Once I move the router and cable modem onto the UPS I should easily get 30 minutes of runtime which is more than ample to handle most of the blackouts I have experienced. If shaun, my windows desktop, was also running I would be surprised if I get 10 minutes…

And what was the uptime? 8,209,932 seconds which is just over 95 days. I think this is the third longest uptime for preston (it wouldn’t have been so high without the UPS riding me through some small outages) with the longer times being 115 and 105 days. In comparison I never exceeded 100 days on gromit, my old linux box.

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