WHAT IS "TIER IV"? And exactly why with an overall availability of 99.995%? What is It the 0.005 not?
Tier IV is a data center that will be completely redundant in terms of electrical, cooling and network circuits, this structure, makes it possible to cope with serious technical accidents without the need to interrupt the services supplied by the data center.
It's overall availability is 99.995% because of the design of its electrical infrastructure (solar park +
wind turbines). The TIER IV classification comprise of two active energy lines which is solar panels + wind turbines + APC UPS + diesel generator and cooling + redundant components on each line, designed to withstand every single system failure without affecting the operations of the data center.