In this ultimate how to audit guide to ISO 27001 Annex A 8.14 Redundancy of Information Processing Facilities, you will learn directly from an ISO 27001 Lead Auditor:
- 10 Key Audit Steps
- Verification Criteria
- Required Evidence
- The Pass / Fail Test
I am Stuart Barker, the ISO 27001 Lead Auditor and author of the Ultimate ISO 27001 Toolkit.
Using over 30 years of industry experience across hundreds of audits, I’m giving you the exact templates, walkthroughs, and practical examples you need to achieve ISO 27001 certification.
Table of contents
- ISO 27001 Annex A 8.14 Redundancy of Information Processing Facilities Audit Checklist
- 1. Redundancy Requirements Definition Verified
- 2. Single Points of Failure (SPOF) Analysis Confirmed
- 3. Dual Power Supply and UPS Integrity Validated
- 4. Network Path Diversity Verified
- 5. High Availability (HA) Cluster Functionality Confirmed
- 6. Cloud Availability Zone (AZ) Distribution Validated
- 7. Redundant Component Maintenance Records Present
- 8. Environmental Control Redundancy Confirmed
- 9. Failover Drill and Testing Evidence Verified
- 10. Management Review of Redundancy Metrics Recorded
ISO 27001 Annex A 8.14 Redundancy of Information Processing Facilities Audit Checklist
Auditing ISO 27001 Annex A 8.14 Redundancy of Information Processing Facilities is the technical verification of system availability and resilience protocols. The Primary Implementation Requirement is architectural hardening to eliminate single points of failure, providing the Business Benefit of continuous operational uptime and disaster resilience.
This checklist provides a binary validation framework to establish the availability and resilience of critical IT infrastructure. Use this checklist to validate compliance with ISO 27001 Annex A 8.14.
1. Redundancy Requirements Definition Verified
Verification Criteria: Business requirements for the availability of information systems are formally documented, identifying specific redundancy levels for critical assets.
Required Evidence: Business Impact Analysis (BIA) or Service Level Agreements (SLAs) specifying Uptime requirements.
Pass/Fail Test: If the organisation cannot identify which facilities require redundancy based on a formal risk or impact assessment, mark as Non-Compliant.
2. Single Points of Failure (SPOF) Analysis Confirmed
Verification Criteria: A technical review of the architecture has been conducted to identify and mitigate single points of failure in hardware, software, and utilities.
Required Evidence: Network topology diagrams and infrastructure maps showing redundant paths and failover mechanisms.
Pass/Fail Test: If a single hardware failure (e.g. a lone edge router or power feed) can cause a total system outage for a critical service, mark as Non-Compliant.
3. Dual Power Supply and UPS Integrity Validated
Verification Criteria: Critical equipment is supported by redundant power feeds, including Uninterruptible Power Supplies (UPS) and secondary generators.
Required Evidence: Physical inspection or data centre maintenance logs confirming dual power distribution units (PDUs) and UPS load-test certificates.
Pass/Fail Test: If critical servers are connected to a single PDU or if the UPS fails a simulated load-transfer test, mark as Non-Compliant.
