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Re:‘This Did Not Go Well’: Inside PG&E’s Blackout Control Room by ip26 on Saturday October 12, 2019 @09:17PM (#21237584)
Everybody thinks they need six nines.

I'm really a fan of this bit:

https://www.lowtechmagazine.com/2018/12/keeping-some-of-the-...

Re:‘This Did Not Go Well’: Inside PG&E’s Blackout Control Room by ctdonath on Sunday October 13, 2019 @11:51AM (#21241026)
Those accepting less than “six nines” are trading for some other features. I’ll take less uptime but only to eliminate dependency.

We struggled to reach “six nines“ for a reason.