In this ultimate how to implement guide to ISO 27001 Annex A 8.14 Redundancy of Information Processing Facilities, you will learn directly from an ISO 27001 Lead Auditor:
- The requirement of the control
- The required implementation steps
- The minimum requirement
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 Redundancy of Information Processing Facilities Implementation Checklist
- 1. Establish RTO and Availability Requirements
- 2. Identify Single Points of Failure (SPOF)
- 3. Implement Network Connectivity Redundancy
- 4. Configure Power Supply Redundancy
- 5. Deploy High Availability (HA) Server Clusters
- 6. Implement Storage Redundancy (RAID/Mirroring)
- 7. Architect Cloud Availability Zones (AZ)
- 8. Implement Application Load Balancing
- 9. Perform “Pull the Plug” Failover Testing
- 10. Monitor Redundant Systems Status
- ISO 27001 Annex A 8.14 SaaS / GRC Platform Implementation Failure Checklist
Implementing ISO 27001 Annex A 8.14 requires establishing robust Redundancy of Information Processing Facilities to prevent service interruptions. By designing failover mechanisms for power, network, and server infrastructure, organizations ensure continuous business availability and resilience against hardware failures or environmental outages.
ISO 27001 Redundancy of Information Processing Facilities Implementation Checklist
Use this implementation checklist to achieve compliance with ISO 27001 Annex A 8.14. Compliance requires distinct, tested hardware and software failover mechanisms, not just a policy document stating you “aim for 99.9% uptime”.
1. Establish RTO and Availability Requirements
Control Requirement: Information processing facilities must have sufficient redundancy to meet availability requirements.
Required Implementation Step: Consult the Business Impact Analysis (BIA) to determine the Maximum Tolerable Downtime (MTD) for critical assets. Hardcode these values into your Service Level Agreements (SLAs); if the business demands 99.99% uptime, you must architect for N+1 redundancy immediately.
Minimum Requirement: Defined RTO (Recovery Time Objective) values for every critical system, signed off by asset owners.
2. Identify Single Points of Failure (SPOF)
Control Requirement: Identify and eliminate single points of failure in the architecture.
Required Implementation Step: Conduct a physical and logical audit of the infrastructure diagram. Trace the path of a packet from the ISP to the database; if it passes through a single firewall, a single switch, or a single power supply unit (PSU), you must install a duplicate component.
Minimum Requirement: No critical service may rely on a single piece of hardware or a single cable.
3. Implement Network Connectivity Redundancy
Control Requirement: Ensure network availability persists during provider outages.
Required Implementation Step: Provision two distinct internet circuits from different physical carriers (e.g., fibre and 5G/microwave). Configure your edge routers (e.g., via BGP or SD-WAN) to failover automatically if the primary link detects packet loss or high latency.
Minimum Requirement: Physically separate entry points for cables into the building to prevent “backhoe fade”.
