Case Study: When Redundancy Exists on Paper but Fails During Maintenance
The data center was designed with two independent electrical distribution paths, A and B, to support critical IT equipment.
Data Centre Design and ResilienceArticles / Knowledge Base
Articles / Knowledge Base
60 results
Case Study: The Cooling System Was Running — But the Data Hall Was Still Overheating
OverviewData center cooling systems are often designed with redundant cooling units, pumps, and power supplies.
Cooling and Environmental Control
Case Study: When Redundancy Was Not Enough — A Data Center Utility Power Failure
OverviewData centers are designed with multiple layers of redundancy to maintain critical IT services when individual components fail.
Data Center Electrical Systems
Best Practices for Data Center Network Rooms, Meet-Me Rooms, and Telecommunications Distribution Infrastructure
IntroductionThe telecommunications and network infrastructure of a data center is one of the facility’s most important availability systems.
Networking and Telecommunications
Rack Airflow Management for High-Density IT: A Comprehensive Data Center Engineering Guide
Long-form engineering article on Airflow and Containment, covering design, resilience, commissioning, operations, maintenance and lifecycle management.
Cooling and Environmental Control
Data Centre Fundamentals: How Critical Infrastructure Supports Digital Services
Comprehensive long-form Data Centre Fundamentals training article covering integrated critical infrastructure, resilience, power, cooling, operations, commissioning and lifecycle management.
Data Centre Fundamentals
Data Centre Electrical Fundamentals: From Utility Power to the IT Equipment
Comprehensive long-form Data Centre Fundamentals training article covering integrated critical infrastructure, resilience, power, cooling, operations, commissioning and lifecycle management.
Data Centre Fundamentals
Physical Security Architecture for Data Centers: Defense in Depth from Perimeter to Rack
Layered security from site perimeter through security zones, controlled rooms and rack-level protection.
Data Centre Design and Resilience
Data Center Access Control: Credentials, Mantraps, Anti-Passback and Least Privilege
Access-control engineering covering identity, credentials, least privilege, mantraps, anti-passback, alarms and audit trails.
Data Centre Design and Resilience
CCTV and Video Surveillance in Data Centers: Coverage, Retention and Incident Evidence
Professional CCTV design covering camera purpose, coverage, image quality, recording, retention, timestamps and incident evidence.
Data Centre Design and Resilience
Visitor and Contractor Security in Data Centers: Authorization, Escort and Audit Controls
Visitor and contractor controls covering pre-authorization, identity verification, temporary credentials, escorts and audit records.
Data Centre Design and Resilience
Commissioning Data Center Physical Security Systems: Access Control, CCTV and Failure Testing
Commissioning security systems through point testing, door scenarios, CCTV verification, alarms, backup power, network failures and integrated tests.
Data Centre Design and Resilience
Commissioning Documentation and Handover: Turning Test Results into Operational Readiness
A practical guide to data center commissioning documentation and handover, covering test records, as-built drawings, settings, deficiency logs, training, operating procedures, asset data, backups and readiness acceptance.
Testing and Commissioning
Recommissioning Live Data Centers: Testing Existing Critical Infrastructure Without Creating an Outage
A practical guide to recommissioning operating data centers, covering baseline assessment, live-site risk, phased testing, maintenance windows, degraded redundancy, controls, documentation and recovery planning.
Testing and Commissioning
Preventive and Predictive Maintenance in Data Centers: Building a Risk-Based Maintenance Program
A practical guide to building a data center maintenance program using preventive, predictive and condition-based methods, asset criticality, maintenance windows, evidence, trend analysis and lifecycle planning.
Preventive and Corrective Maintenance
Change Management in Data Centers: Controlling Risk Before Work Begins
A practical guide to data center change management covering risk classification, approvals, maintenance windows, MOP review, rollback plans, communication, configuration control and post-change verification.
Preventive and Corrective Maintenance
Alarm Management in Data Centers: Priorities, Escalation and Avoiding Alarm Fatigue
A practical guide to data center alarm management, covering alarm classification, priorities, delays, escalation, nuisance alarms, shelving, acknowledgment, ownership, incident correlation and continuous improvement.
BMS, EPMS and DCIM
Electrical Power Monitoring in Data Centers: What EPMS Should Measure and Why
An engineering guide to EPMS monitoring in data centers, covering voltage, current, demand, energy, harmonics, breaker status, sequence of events, branch monitoring and how electrical data supports reliability and capacity planning.
BMS, EPMS and DCIM
BMS, EPMS and DCIM in Data Centers: Understanding the Roles and Boundaries
A practical guide to the roles of BMS, EPMS and DCIM in data centers, explaining what each platform monitors, where responsibilities overlap, how integration should be designed and why operational ownership matters.
BMS, EPMS and DCIM
Chilled-Water Cooling Architecture for Data Centers: Chillers, Pumps, CRAHs and Redundancy
An engineering guide to chilled-water cooling in data centers, covering chillers, pumps, heat exchangers, CRAHs, supply and return temperatures, hydraulic design, redundancy, controls and maintenance states.
Cooling and Environmental Control
Environmental Control in Data Centers: Temperature, Humidity, Dew Point and Sensor Strategy
A practical guide to environmental control for data centers, explaining temperature, humidity and dew point at IT inlets, ASHRAE equipment classes, sensor placement, alarm thresholds, trends and change control.
Cooling and Environmental Control
Commissioning Data Center Cooling Systems: Proving Capacity, Redundancy and Failure Response
A practical cooling commissioning guide covering pre-functional checks, CRAHs, chillers, pumps, controls, sensor calibration, load simulation, failure scenarios, recovery and integrated systems testing.
Cooling and Environmental Control
Data Center Electrical Distribution Architecture: From UPS Output to the IT Rack
A practical guide to data center electrical distribution from UPS output through switchboards, PDUs, RPPs, busways and rack PDUs, with emphasis on redundancy, selectivity, maintainability and failure domains.
Data Center Electrical Systems
Automatic Transfer Switches in Data Centers: Source Sensing, Transfer Modes and Failure Risks
A practical engineering guide to Automatic Transfer Switches in data centers, covering source sensing, open, delayed and closed transition, generator interaction, controls, bypass isolation, alarms and common failure modes.
Data Center Electrical Systems
Commissioning and Testing ATS, STS and Critical Switching Systems
A structured commissioning guide for ATS, STS and critical switching systems in data centers, covering inspection, source simulation, transfer timing, interlocks, bypass, alarms, failure scenarios and integrated system testing.
Data Center Electrical Systems
Static Transfer Switches in Data Centers: Protecting Single-Corded Critical Loads
A practical explanation of Static Transfer Switches for data centers, covering dual-source operation, fast solid-state transfer, source quality, synchronization, fault behavior, maintenance and use with single-corded equipment.
Data Center Electrical Systems
Switchgear Interlocking and Safe Switching in Data Centers
A practical guide to electrical interlocking and switching discipline in data centers, covering mechanical, electrical and key interlocks, switching procedures, LOTO, independent verification and human-error prevention.
Data Center Electrical Systems
Data Center Battery Technologies: VRLA and Lithium-Ion for UPS Energy Storage
Battery technology is a fundamental design decision in a data center UPS system. The battery must support the critical load immediately when the normal source is lost and remain dependable after long periods of standby operation. The role of.
Batteries and Energy Storage
Designing UPS Battery Autonomy: Runtime, Capacity, End-of-Life Margin and Real Load
UPS battery autonomy is often specified as a number of minutes, but reliable sizing begins by defining what those minutes must achieve. In a generator-backed data center, the battery is part of a continuity sequence involving source loss, UPS.
Batteries and Energy Storage
Data Center Power Architecture: Designing Resilient Electrical Paths from Utility to IT Load
A practical guide to resilient data center power architecture, covering utility sources, transformers, switchgear, UPS, generators, A/B paths, redundancy, failure domains and maintainability.
Data Center Electrical Systems
Utility Supply and Transformers for Data Centers: Capacity, Redundancy and Protection
An engineering guide to utility feeders and transformers in data centers, covering source diversity, transformer loading, redundancy, inrush, protection, monitoring and maintenance.
Data Center Electrical Systems
Selective Coordination and Short-Circuit Protection in Data Center Power Systems
A practical guide to short-circuit studies and selective coordination in data centers, covering fault levels, breaker ratings, trip curves, settings, maintenance states and commissioning.
Data Center Electrical Systems
Power Quality in Data Centers: Harmonics, Voltage Events, Surge Protection and Monitoring
An engineering guide to power quality in data centers, covering harmonics, voltage sags and swells, frequency, transients, surge protection, monitoring and troubleshooting.
Data Center Electrical Systems
Data Center Network Architecture: Designing Resilient Leaf-Spine Fabrics
A practical guide to resilient data center network architecture, covering leaf-spine topology, failure domains, redundancy, routing, capacity and operational simplicity.
Networking and Telecommunications
Monitoring Data Center Networks: Telemetry, Availability and Incident Evidence
A practical framework for monitoring data center networks using device health, interface telemetry, flow data, time synchronization, alerting and evidence-based incident analysis.
Networking and Telecommunications
Planning High-Speed Ethernet Migration in Data Centers: 100G, 400G and 800G
An engineering guide to planning higher-speed Ethernet migration, covering bandwidth demand, optics, fiber plant, breakout strategy, power, cooling, testing and staged deployment.
Networking and Telecommunications
Power Usage Effectiveness in Data Centers: Measuring and Improving PUE Correctly
A standards-based guide to measuring, interpreting and improving Power Usage Effectiveness (PUE) using consistent boundaries, metering and operational context.
Sustainability and Energy Efficiency
Cooling Efficiency Ratio in Data Centers: Measuring Cooling-System Energy Performance
A standards-based guide to Cooling Efficiency Ratio (CER), cooling-energy measurement, interpretation and improvement opportunities in data centers.
Sustainability and Energy Efficiency
IT Equipment Energy Efficiency and Utilization: Looking Beyond Facility PUE
A practical guide to server energy-efficiency and utilization KPIs, explaining why facility PUE alone cannot show how effectively IT capacity is being used.
Sustainability and Energy Efficiency
Data Center Basis of Design and Requirements Management: Turning Business Needs into Engineering Criteria
How to develop and control a data center Basis of Design, translating business requirements into measurable engineering criteria and traceable design decisions.
Design and Project Management
Commissioning and Handover Planning in Data Center Projects: Start Before Construction Ends
How to integrate commissioning, documentation, training and operational readiness into the project plan from design through final acceptance.
Design and Project Management
Data Center CAPEX and OPEX: Building a Reliable Cost Model
A practical framework for separating and modelling data center CAPEX and OPEX across design, construction, infrastructure, operations, maintenance and growth.
Financial and Economic Analysis
Life-Cycle Costing for Data Centers: Looking Beyond Initial Purchase Price
How to evaluate data center infrastructure using lifecycle cost, including purchase, energy, maintenance, replacement, downtime exposure and end-of-life cost.
Financial and Economic Analysis
NPV, Payback and Discounted Cash Flow for Data Center Investments
A practical guide to evaluating data center investments using NPV, payback and discounted cash flow while documenting assumptions and uncertainty.
Financial and Economic Analysis
Human Factors in Data Center Operations: Designing Work to Reduce Error
A practical guide to reducing operational error in data centers through task design, procedures, supervision, verification and learning.
Human Factors and Organisational Culture
Fatigue and Workload Management in Critical Data Center Operations
A practical approach to managing fatigue, workload, night work, emergency response and psychosocial risks in critical data center operations.
Human Factors and Organisational Culture
AI and High-Density Computing in Data Centers: Infrastructure Design for the Next Generation
In-depth educational article. AI and accelerated computing concentrate power, heat, bandwidth and weight into smaller footprints. Infrastructure must therefore be engineered as an integrated electrical, mechanical, network, structural and operational system.
Emerging Technologies and Future Trends
Utility Power Architecture for Data Centers: Feeders, Substations and Source Diversity
Extended technical training article covering data-center utility power, transformers, MV switchgear, protection, commissioning, maintenance and resilient operations.
Utility Supply and Transformers
Data Center Transformers: Sizing, Redundancy, Loading, Efficiency and Thermal Performance
Extended technical training article covering data-center utility power, transformers, MV switchgear, protection, commissioning, maintenance and resilient operations.
Utility Supply and Transformers
Medium-Voltage Switchgear in Data Centers: Protection, Selectivity, Interlocking and Maintainability
Extended technical training article covering data-center utility power, transformers, MV switchgear, protection, commissioning, maintenance and resilient operations.
Utility Supply and Transformers
Data Center Short-Circuit and Protection Studies: From Utility Fault Level to Selective Clearing
Extended technical training article covering data-center utility power, transformers, MV switchgear, protection, commissioning, maintenance and resilient operations.
Utility Supply and Transformers
Utility and Transformer Operations in Data Centers: Switching, Maintenance, Testing and Failure Response
Extended technical training article covering data-center utility power, transformers, MV switchgear, protection, commissioning, maintenance and resilient operations.
Utility Supply and Transformers
Data Center Operations Management: Building a Controlled 24x7 Operating Model
Extended technical training article covering 24x7 data-center operations, maintenance, change, incidents, operational readiness and lifecycle controls.
Preventive and Corrective Maintenance
Preventive and Condition-Based Maintenance in Data Centers: From Calendar Tasks to Asset Health
Extended technical training article covering 24x7 data-center operations, maintenance, change, incidents, operational readiness and lifecycle controls.
Preventive and Corrective Maintenance
Data Center Change Management: Controlling Risk During Live-Facility Work
Extended technical training article covering 24x7 data-center operations, maintenance, change, incidents, operational readiness and lifecycle controls.
Preventive and Corrective Maintenance
Data Center Incident Management: Detection, Stabilization, Recovery and Root-Cause Learning
Extended technical training article covering 24x7 data-center operations, maintenance, change, incidents, operational readiness and lifecycle controls.
Preventive and Corrective Maintenance
Data Center Operational Readiness: Procedures, Spares, Staffing, Training and Emergency Preparedness
Extended technical training article covering 24x7 data-center operations, maintenance, change, incidents, operational readiness and lifecycle controls.
Preventive and Corrective Maintenance
Data Center Commissioning Fundamentals: From Design Intent to Proven Operational Performance
Extended technical training article covering data-center commissioning planning, functional testing, IST, failure scenarios, evidence and operational readiness.
Testing and Commissioning
Electrical Commissioning in Data Centers: MV, Transformers, Generators, UPS and Distribution
Extended technical training article covering data-center commissioning planning, functional testing, IST, failure scenarios, evidence and operational readiness.
Testing and Commissioning
Mechanical and Cooling Commissioning in Data Centers: Proving Capacity, Control and Resilience
Extended technical training article covering data-center commissioning planning, functional testing, IST, failure scenarios, evidence and operational readiness.
Testing and Commissioning