Disaster recovery is the set of plans, tools and steps an organisation uses to restore its IT systems, data and infrastructure after a disruptive event such as an outage, hardware failure or cyber attack. It's the technology side of keeping a business running, and it works to agreed targets for speed and data loss.
What disaster recovery is
Disaster recovery is specifically about IT. It covers the systems, data and infrastructure a business depends on: servers, cloud services, applications and files. When any of those fail, the disaster recovery plan is the document that sets out who does what, in what order, to bring them back.
The plan exists because recovery under pressure is far harder than it looks. Without a clear, tested procedure, teams waste time, make mistakes and lose data they could have saved. NCSC guidance on business continuity is explicit: having a plan is only useful if you've practised it.
Any organisation that relies on IT to trade - which is almost every business today - needs some form of disaster recovery, whether that's a simple backup regime or a full standby environment.
How disaster recovery works
In practice, disaster recovery rests on four things: reliable backups that are tested regularly, replication (copying data to a second location so a single site failure doesn't wipe everything), failover (switching to standby systems when primary systems go down) and a plan that ties them together.
Testing is the part most organisations skip. An untested plan is a liability: it may contain errors, outdated contact details or gaps that only surface when you need it most. Schedule a walkthrough or a live test at least once a year.
Many businesses now buy disaster recovery as a service (DRaaS), where a provider manages the backup infrastructure, replication and failover capability on their behalf. This makes enterprise-grade recovery accessible without a large capital investment in hardware.
Disaster recovery, business continuity and the role of RTO and RPO
Disaster recovery restores your IT. Business continuity is the broader discipline of keeping the whole organisation running through a disruption - people, premises and processes as well as technology. Disaster recovery is one component inside a business continuity programme.
Recovery is measured against two agreed targets. The recovery time objective (RTO) sets the maximum time a system can be offline before the business impact becomes unacceptable. The recovery point objective (RPO) sets the maximum amount of data, measured in time, that can be lost. Our entry on RTO and RPO explained goes into both in detail.
ISO 22301, the international standard for business continuity management, provides the framework within which disaster recovery targets are set and tested. Tighter targets demand more investment, so getting these numbers right - neither too loose nor needlessly strict - is important.
Why it matters and what to expect
Downtime is expensive. Our guide to the cost of IT downtime sets out just how quickly the financial, operational and reputational damage adds up, even for smaller businesses. A tested disaster recovery plan is one of the most cost-effective forms of insurance an IT-dependent organisation can hold.
When working with an IT provider, you should expect a documented plan with named roles, clear recovery targets and evidence of regular testing. Vague assurances about backups aren't enough.
Recovery priorities should come from a business impact analysis, which identifies which systems matter most and what happens if each one goes down. That analysis is what turns a generic plan into one that actually fits your business.
Dependable backup and recovery for growing businesses Red Eagle Tech helps UK businesses put reliable, tested disaster recovery in place as part of a managed IT service. Talk to us about what your business needs on our IT Operations service page.
