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Why this module exists. Environmental controls — power, HVAC, fire suppression, water detection — are what keep equipment running. They are also the controls that fail most often outside the security team’s attention. This module covers what to specify, what to audit, and the operational disciplines that prevent environmental incidents.
Why this module exists. The most-common Indian data-centre incident is not a cyber attack — it is an HVAC failure during summer, a UPS battery degradation, or a fire-suppression false trigger. Environmental controls are the practitioner’s lower-glamour, higher-frequency reality.
Power — the foundation
| Layer | Purpose | Failure modes |
|---|---|---|
| Utility power (grid) | Primary supply | Grid outages, surges, brown-outs |
| Dual utility feeds (Tier III+) | Independent grid sources | Same substation failure |
| UPS | Bridge power during transitions | Battery degradation, capacity miscalculation |
| Diesel generators | Extended runtime backup | Fuel supply, starter failure, untested |
| Distribution (PDUs) | Power to racks | Single PDU per rack = SPOF |
The Indian-specific failure: monsoon grid instability + generator starter failure + UPS not sized for the full bridge time. The triple-failure brings down workloads even in facilities advertising Tier III availability.
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