Data Center Reliability Levels

Numerical Ranking
Terminology
Summary Definition

1

Unreliable
  • Shared power and cooling
  • No generator
  • No fire separation (standard construction materials)
  • No fire suppression

2

Unreliable/Improved Power
  • Dedicated Unconditioned Power
  • Shared building cooling
  • No generator, no TVSS
  • Non-redundant air conditioning
  • No fire separation
  • Wet or no sprinklers

3

Unreliable-Improved Power/Cooling
  • Independent power and cooling
  • No UPS, generator or TVSS
  • Non-redundant dedicated A/C
  • No fire separation
  • Wet or no sprinklers

4

Conditioned
  • Dedicated power and cooling
  • Conditioned power (no UPS or generator)
  • Dedicated non-redundant A/C units
  • Limited fire rating (<1hr, wet sprinklers)

5

Isolated
  • Dedicated power & cooling systems
  • Single UPS (no back-up), No generator
  • Non-redundant dedicated A/C units
  • Fire rating of 1 hour
  • Limited / wet suppression

6

Improved-Isolated
  • Dedicated power, UPS and cooling
  • Redundant dedicated A/C units
  • No generator
  • Fire rating of 1hour
  • Smoke detection / pre-action sprinkler system

7

Reliable
  • Dedicated power, UPS, cooling systems
  • Redundant & dedicated A/C units
  • Single back-up generator
  • Fire rating 1hr
  • Intelligent detection system
  • Pre-action Sprinkler System

8

Reliable/Redundant
  • Dedicated & redundant power and cooling components
  • Redundant UPS, A/C, generators
  • Dedicated generators / single fuel system
  • Fire rating 1 hour
  • Intelligent Detection System
  • Pre-action sprinkler system
  • Optional gaseous fire suppression system

9

Highly Reliable
  • Fully redundant: (power train, cooling systems
  • Redundant UPSs, A/C, Generators, fuel systems
  • Physical segregation of redundant systems
  • Fire rating 1 hour
  • Intelligent detection system
  • Pre-action sprinkler system
  • Optional gaseous fire suppression system

10

Geographically Hardened & Redundant
  • All Redundant: (power train, cooling system, UPS systems, generators, fuel systems
  • Physical segregation of redundant systems
  • Fire rating of 2 hours
  • Intelligent detection system
  • Pre-action sprinkler system
  • Optional gaseous fire suppression system
  • Site is hardened for weather and geographic exposures
  • Location minimizes exposure to jurisdictional closure from hazardous spill, acts of terrorism, sabotage or similar risks

¬†This is a summary of BRUNS-PAK’s Reliability Scale. A more detailed breakdown of the architectual, electrical, mechanical, fire suppression, and security elements within the BRUNS-PAK 1-10 Scale is addressed in BRUNS-PAK’s initial consulting engagements.