A Tier 1 Data Center is a single path for power and cooling with no redundancy. Maintenance requires outages and 99.671% availability with an annual downtime of 28.8 hours.
Businesses using Tier 1 Data Centers are typically small and mostly cash-based. They have partial online presence and little reliance on IT. They see downtime as a tolerable inconvenience.
Tier 1 Data Center infrastructure has numerous points of failure. Hey have no generator if UPS has 8 minutes of backup time. Tremendously vulnerable to severe weather and can withstand a 10 minute power outage.
Tier 1 Data Centers are vulnerable to disruptions from both planned and unplanned activity. They may have a UPS, backup generator or raised floors. They are tremendously vulnerable to severe weather and usually unable to withstand more than a 10 minutes power outage. The generators are single-module systems and have many points of failure. The center must be shut down annually to perform preventative maintenance work. Unplanned failures of site infrastructure components will cause service disruptions.