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A Tier 3 data center is a location with redundant and dual-powered servers, storage, network links and other IT components. It is one of the most commonly used data center tiers, where IT components are powered with multiple, active and independent sources of power and cooling resources.
A Tier 3 data center is also known as a Level 3 data center.
A Tier 3 data center combines and exceeds features and capabilities of Tier 1 and Tier 2 data centers but with redundant capacity and data center infrastructure components. It is the third level/tier of data centers introduced by the Uptime Institute.
Like a Tier 2 data center, IT components can be replaced or removed without interrupting routine data center operations.
With the redundant and always active power supply, there is minimal planned and unplanned downtime. It guarantees 99.982 percent availability with a fractionally of less than two hours of downtime per year.