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Many business owners assume that disasters, the kind that knock out IT systems, happen to other people. Then a flood damages the server room, a ransomware attack encrypts every file on the network, or a critical hardware failure takes the business offline. Suddenly, the value of a solid IT disaster recovery plan becomes painfully clear.
The good news: disaster recovery is no longer just for large enterprises. Advances in cloud technology have made effective, affordable disaster recovery accessible to businesses of every size.
What is IT Disaster Recovery?
IT disaster recovery (DR) is the process of restoring your IT systems, data, and infrastructure after a disruptive event. It covers everything from recovering individual files to restoring entire servers and getting your business back online after a major incident.
A disaster in the IT context can mean many things:
- Ransomware or a cyber attack that locks or destroys your data
- Hardware failure: a server, storage system, or network device failing
- Human error: accidental deletion of critical files or misconfiguration
- Natural events: flood, fire, power outage, or physical damage to your premises
- Supplier failure: a critical cloud service or SaaS application going offline
Key Concepts: RTO and RPO
Every IT disaster recovery plan is built around two key metrics:
RTO (Recovery Time Objective): How long can your business tolerate being without its IT systems? An RTO of four hours means you need to be back online within four hours of an incident. The lower your RTO, the more robust, and typically more expensive your DR solution needs to be.
RPO (Recovery Point Objective): How much data can you afford to lose? An RPO of one hour means your last backup must be no more than one hour old. This determines how frequently your data needs to be backed up.
Understanding your RTO and RPO is the starting point for any IT disaster recovery plan, as they define exactly how much protection your business needs.
What Does an IT Disaster Recovery Plan Include?
A comprehensive IT disaster recovery plan typically covers:
- A full inventory of your IT systems and their criticality to the business
- Defined RTO and RPO for each system
- A description of your backup and replication strategy
- Roles and responsibilities: who does what in the event of an incident
- Step-by-step recovery procedures for each system
- Contact lists for IT support, suppliers, and key stakeholders
- A communication plan for staff and customers
- A schedule for testing and reviewing the plan
Cloud Disaster Recovery: The Modern Approach
Traditional disaster recovery required businesses to maintain a second physical site with duplicate hardware, which was expensive, complex, and often only feasible for larger organisations. Cloud disaster recovery has changed everything.
With cloud DR, your data and systems are continuously or regularly replicated to a secure cloud environment. In the event of an incident, you can switch to the cloud copy, sometimes in minutes, and continue operating while your primary systems are restored.
Benefits of cloud disaster recovery include:
- Lower cost than maintaining a secondary physical site
- Faster recovery times: automated failover can bring systems back online in minutes
- Geographic redundancy: your data is stored away from your physical premises
- Scalability: cloud DR can grow with your business without large capital investment
- Regular, automated testing to ensure your plan actually works
Backup is Not the Same as Disaster Recovery
This is a common misconception that catches businesses out. A backup is a copy of your data. Disaster recovery is the complete process of restoring your IT systems to a functional state, which includes not just data but applications, configurations, network settings, and infrastructure.
Many businesses find that when they actually try to recover from a backup after a major incident, the process takes far longer than expected because they haven’t tested it and haven’t accounted for all the steps involved. This is why a documented, tested DR plan is essential.
Testing Your Disaster Recovery Plan
A disaster recovery plan that has never been tested is not a plan, it’s a document. Regular DR testing validates that your backups are complete, your recovery procedures work as expected, and your team knows what to do. Most managed DR providers include regular testing as part of their service.
How SilverCloud Can Help
SilverCloud helps UK businesses design, implement, and manage IT disaster recovery solutions from straightforward cloud backup to comprehensive managed DR with fast failover capabilities. We work with you to understand your business’s RTO and RPO requirements and build a proportionate solution.