Datacenter FAQ — PUE, Tier, Cooling, Colocation Explained
Datacenter fundamentals: PUE, Tier ratings, cooling types, colocation costs, redundancy. Complete FAQ.
What is a good PUE for a datacenter?
PUE (Power Usage Effectiveness) measures datacenter efficiency. Average industry PUE is 1.55 (Uptime Institute 2024). Best-in-class hyperscale: 1.10-1.20. Harch Corp achieves PUE 1.08-1.24 through liquid cooling, free cooling, and AI-optimized HVAC. Lower PUE = more efficient.
What is the difference between Tier I, II, III, and IV datacenters?
Tier I: 99.671% uptime (28.8h downtime/yr), no redundancy. Tier II: 99.741% (22h), N+1 power. Tier III: 99.982% (1.6h), N+1 power+cooling, concurrently maintainable. Tier IV: 99.995% (26 min), 2N fully redundant, fault tolerant. Harch Corp operates Tier III+ facilities.
How much does datacenter colocation cost?
Colocation costs vary by location and density: (1) Standard rack (5-10kW): $400-1,500/month, (2) High-density rack (15-20kW): $1,500-4,000/month, (3) GPU rack (30-50kW with liquid cooling): $4,000-12,000/month. Harch Corp offers competitive Morocco pricing: standard rack from $600/month, GPU rack from $5,000/month.
What is liquid cooling and when is it needed?
Liquid cooling uses liquid (water or dielectric fluid) instead of air to cool servers. It's needed when rack power density exceeds 20kW/rack (typical for AI/GPU workloads). Benefits: 40-50% lower PUE, 50kW+/rack density, quieter operation. Harch Corp uses direct-to-chip liquid cooling for all GPU clusters.
What is the difference between N+1 and 2N redundancy?
N+1 means one backup component for N active components (e.g., 2 UPS for 1 needed). 2N means full duplication (e.g., 2 completely separate power systems). 2N is more reliable but more expensive. Harch Corp uses 2N for power (dual feeds, dual UPS, dual generators) and N+1 for cooling.
How much power does a datacenter consume?
Datacenter power consumption varies: (1) Small enterprise DC: 100-500kW, (2) Mid-size commercial: 1-5MW, (3) Hyperscale: 50-500MW. A single H100 GPU server (8 GPUs) consumes ~7kW. AI workloads are driving datacenter power demands to unprecedented levels. Harch Corp's 5 hubs total 50MW capacity.
What is free cooling and how does it work?
Free cooling uses outside air or water to cool datacenters instead of mechanical chillers, saving 30-60% on cooling energy. Morocco's temperate climate enables 5,000+ hours/year of free cooling. Harch Corp uses air-side economizers (free cooling) when outside temperature is below 24°C, and direct-to-chip liquid cooling year-round.
What is hot aisle/cold aisle containment?
Hot aisle/cold aisle containment arranges server racks so that hot exhaust air and cool intake air don't mix. Cold aisles (front of servers) receive cool air; hot aisles (rear of servers) collect exhaust. This improves cooling efficiency by 15-25%. Harch Corp uses hot aisle containment with liquid-cooled rear doors.
How do I choose a datacenter location?
Key factors: (1) Latency to users (sub-50ms for real-time apps), (2) Power cost and availability, (3) Climate (free cooling potential), (4) Renewable energy availability, (5) Network connectivity (submarine cables, fiber), (6) Political stability, (7) Data sovereignty laws. Morocco offers an excellent balance.
What is datacenter tier certification?
Tier certification is awarded by the Uptime Institute based on: (1) Design (Tier I-IV), (2) Construction (Facility), (3) Operational sustainability (Gold/Silver/Bronze). Certification requires independent audits. Harch Corp's facilities are designed to Tier III+ standards and pursuing official certification.