99.999999999% Durability

Fun with numbers

Definition: 99% reliability means that you will lose one object out of 100 every year
So, 5 9’s means and 11 9’s mean in terms of durability ?
Losing 1 object out of 100000 every year and 1 object out of 100000000000 every year. Some math below:

1 – 1/100000
.99999000000000000000
99.999%
1 – 1/100000000000
.99999999999
.*100
99.99999999900000000000
365 * 24 (hours per year)
8760
99.8 / 100 * 8760 (uptime only 99.8 % of time)
8742.48

8760–8742.48
== 17.52 (only so much hours per year downtime allowed)
== 17.52 * 60 / 52 = 20.2153846 minutes per week
== 2.887912 per day

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