Data Center Standards – Tier I to IV
| PARAMETERS | Tier 1 | Tier 2 | Tier 3 | Tier 4 |
|---|---|---|---|---|
| Uptime Guarantee | 99.671% | 99.741% | 99.982% | 99.995% |
| Redundancy | None | Partial power and cooling redundancy (partial N+1) | Full N+1 | 2N+1 |
| Power Protection | None | Partial | At least 72-hour power outage protection | 96-hour power outage protection |
| Downtime per year | <28.8 Hours | <22 hours | <1.6 hours | <26.3 minutes |
| Price | $ | $$ | $$$ | $$$$ |