On Thu, 26 Apr 2018 14:00:37 +0000, Allan Staller wrote:

>(z/OS) claims "six nines" of availability (99.999999%;

That would be eight nines. Do they talk about six nines now? 
I remember 5 nines, or available 99.999% of the time. That corresponds 
to about 315 seconds of down time per year, by my calculations.

-- 
Tom Marchant

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