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Why this module exists. Data-centre physical security is a specialised domain with its own standards (Uptime Institute Tiers, TIA-942, NCIIPC requirements for critical infrastructure). This module covers the standards, the cage and rack security model, and the practical considerations for Indian-hosted regulated workloads.
Why this module exists. Whether you operate your own data centre or rent rack space, understanding data-centre security standards is the prerequisite to evaluating whether a facility actually protects your equipment. This module is the framework.
The Uptime Institute Tier classification
| Tier | Uptime guarantee | Redundancy |
|---|---|---|
| Tier I | 99.671% (28.8h downtime/yr) | No redundancy |
| Tier II | 99.741% (22h) | Partial redundancy (N+1 components) |
| Tier III | 99.982% (1.6h) | Concurrently maintainable (any single component can be removed for maintenance without downtime) |
| Tier IV | 99.995% (26 min) | Fault-tolerant (any single failure does not affect operation) |
Most Indian banking and regulator workloads land in Tier III or Tier IV facilities. Tier III is the standard for serious enterprise workloads; Tier IV adds capital cost rarely justified except for trading-floor and similar use cases.
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