Tier 3 & 4 Data Center Downtime: Allowed Minutes Per Year

For Tier Level 3 Data Center:

The Tier Level 3 data center guarantees 99.982% availability. This means that the maximum allowed downtime per year is 0.018%.

To calculate the allowed downtime in minutes, we can use the formula:

Allowed Downtime (minutes) = Total Minutes in a Year * (1 - Availability Percentage)

Total Minutes in a Year = 365 days * 24 hours * 60 minutes = 525,600 minutes

Allowed Downtime (minutes) = 525,600 minutes * (1 - 0.99982) = 525,600 minutes * 0.00018 = 94.608 minutes

Therefore, a Tier Level 3 Data Center allows a maximum downtime of approximately 94.608 minutes per year.

For Tier Level 4 Data Center:

The Tier Level 4 data center guarantees 99.995% availability. This means that the maximum allowed downtime per year is 0.005%.

Using the same formula as above:

Total Minutes in a Year = 365 days * 24 hours * 60 minutes = 525,600 minutes

Allowed Downtime (minutes) = 525,600 minutes * (1 - 0.99995) = 525,600 minutes * 0.00005 = 26.28 minutes

Therefore, a Tier Level 4 Data Center allows a maximum downtime of approximately 26.28 minutes per year.