A disaster recovery plan isn't something you need until suddenly you desperately need it. And by then, it's too late to make one.
What Counts as a "Disaster"?
It's not just natural disasters. In fact, the most common causes of business data loss are:
- Hardware failure (40% of cases)
- Human error (29%)
- Software corruption (13%)
- Security breaches (9%)
- Natural disasters (9%)
That means 82% of disasters are things that happen in normal operations — a drive fails, someone deletes the wrong database, or a software update goes sideways.
The Two Numbers That Matter
Every disaster recovery plan revolves around two metrics:
RTO — Recovery Time Objective
How long can you afford to be down? If your answer is "not at all," you need high-availability architecture. If you can tolerate a few hours, your plan (and budget) look very different.
RPO — Recovery Point Objective
How much data can you afford to lose? If your RPO is zero, you need real-time replication. If you can lose a day's worth of data, daily backups are sufficient.
Building Your Plan
Step 1: Inventory Your Systems
List everything your business runs on:
- Websites and web applications
- Databases
- Email systems
- Internal tools and documents
- Third-party services you depend on
For each one, determine the RTO and RPO.
Step 2: Design Your Backup Strategy
Based on your RPO:
| RPO | Backup Strategy | |-----|----------------| | Zero | Real-time replication | | < 1 hour | Continuous/incremental backups | | < 24 hours | Daily automated backups | | < 1 week | Weekly backups |
Important: Store backups in a different location than your primary systems. Cloud storage in a different region is the most common approach.
Step 3: Document Recovery Procedures
For each system, write down:
- Who is responsible for recovery
- Step-by-step restoration instructions
- Contact information for vendors and hosting providers
- Expected recovery time
Keep this documentation somewhere accessible even if your primary systems are down. A printed copy isn't a bad idea.
Step 4: Test It
A plan that hasn't been tested isn't a plan — it's a hope. Schedule recovery drills:
- Quarterly: Restore from backup to verify data integrity
- Annually: Full disaster simulation
Common Mistakes
- Backing up to the same server. If the server dies, your backups die with it.
- Never testing restores. Backups that can't be restored are worthless.
- No documentation. If the one person who knows how everything works is unavailable during a disaster, what then?
- Forgetting about SaaS data. Just because it's in the cloud doesn't mean it's backed up. Most SaaS providers explicitly say data recovery is your responsibility.
Start Today
You don't need a perfect plan. You need a plan that's better than "figure it out when it happens." Start with your most critical system, build a backup and recovery procedure for it, and test it. Then expand from there.
Need help building a disaster recovery plan? Let's discuss what makes sense for your business.
Angel G. Gonzalez
Full-stack developer from Puerto Rico. I help businesses build, deploy, and maintain their technology.