| Technology spaces may be large (data centers) or small (communications closets), which feature dedicated environmental controls (temperature & humidity), redundant power (automatic transfer switching, generator backup and uninterruptable power supplies), fire suppression systems, and access controls.
The Uptime Institute created the standard Tier Classification System to consistently evaluate various data center facilities in terms of potential site infrastructure performance, or uptime. The Tiers (I-IV) are progressive; each Tier incorporates the requirements of all the lower Tiers. |
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| Tier I: Basic Capacity: A Tier I data center provides dedicated site infrastructure to support information technology beyond an office setting. Tier I infrastructure includes a dedicated space for IT systems; an uninterruptible power supply (UPS) to filter power spikes, sags, and momentary outages; dedicated cooling equipment that won’t get shut down at the end of normal office hours; and an engine generator to protect IT functions from extended power outages. | |
| Tier II: Redundant Capacity: Components Tier II facilities include redundant critical power and cooling components to provide select maintenance opportunities and an increased margin of safety against IT process disruptions that would result from site infrastructure equipment failures. The redundant components include power and cooling equipment such as UPS modules, chillers or pumps, and engine generators. |  |
| Tier III: Concurrently Maintainable: A Tier III data center requires no shutdowns for equipment replacement and maintenance. A redundant delivery path for power and cooling is added to the redundant critical components of Tier II so that each and every component needed to support the IT processing environment can be shut down and maintained without impact on the IT operation. | |
| Tier IV: Fault Tolerance: Tier IV site infrastructure builds on Tier III, adding the concept of Fault Tolerance to the site infrastructure topology. Fault Tolerance means that when individual equipment failures or distribution path interruptions occur, the effects of the events are stopped short of the IT operations. | |
| Abraxas Sustainable FM Services offers support for a range of data center infrastructure design and maintenance requirements upon request. Abraxas will work with the client to evaluate their desired level of availability compared to the designed infrastructure implementation. | |
