[scottw]

Well, in this case because the power never went out (the UPS only thought it did), none of our usual "the freakin' power is out—send out the diesel trucks and keep the tank full" alarms went off.

It was truly an unexpected case (which was quickly fixed in the UPS hardware), but you know, life is one unexpected case after another, often coming in waves and in bizarre combinations. I don't believe in 100% uptime anymore :)

[moe]

It was truly an unexpected case (which was quickly fixed in the UPS hardware), but you know, life is one unexpected case after another

The word you are looking for is incompetence.

An UPS, even a datacenter scale UPS, is not exactly rocket surgery. If your story is true and the device failed over to diesel without notifying anyone then that's not only an epic engineering failure but also an epic fiscal failure for whoever is liable (perhaps the UPS vendor).

Damages from a full DC blackout easily run into the hundred thousands of dollars per hour, not even counting the unbillable shockwave of "our website is down" multiplied by hundreds of customers.

It's a ridiculously expensive "Oops" that easily dwarfs the cost for deploying a proper UPS with proper testing and proper procedures in first place.

Btw the CAT in our Level3 datacenter over here has a big horn and a flashlight on the side. My naive self wants to believe they are there for situations such as the diesel running out...

[scottw]

It was a UPS failure, yes, but this was in the late 90s when the UPS industry wasn't as robust as it is now. Competency is what you get when you learn from your incompetency. We learned something valuable from it (and our UPS people did too).

I also learned to cut people (and some companies) a little slack when I've been down the road they're on. We had a lot of customers who didn't cut us any slack, took their refund and left, which was their prerogative to do so, but found out for themselves that no company has 100% uptime (many came back, lucky for us).