How to Write a Disaster Recovery Plan

A disaster recovery plan (DRP) is a documented, structured process that describes how an organization can quickly resume work after an unplanned incident, minimizing downtime and data loss. Writing one involves a systematic approach of risk assessment, defining recovery objectives, assembling a team, documenting procedures, and establishing a schedule for testing and updates.

A plan fails when it lives only in one engineer’s head or when leadership treats recovery like a checkbox. Before you write detailed recovery steps, set the structure, including people, priorities, and decision rules.

You need executive sponsorship because disaster recovery is not free. For example, aiming to restore the billing platform in two hours usually means paying for replication, making time for testing, and staffing on-call support. Leadership has to sign off on those choices.

Then you build the DR team. Keep roles clear so actions do not collide.

A simple way to see this is: One person drives coordination, while domain owners drive execution. That keeps your response from turning into a group chat with no leader.

This is where you get concrete. A business impact analysis (BIA) identifies what the organization must restore quickly, what can wait, and what dependencies exist between systems.

Start by inventorying the following critical assets:

• Applications: Customer portal, ERP, email, and auth systems
• Data Stores: Databases, file shares, and object storage
• Infrastructure Dependencies: Identity, DNS, network, and VPN
• Third Parties: Payment processors, SaaS platforms, and MSP tools

Now define the following recovery objectives for each critical function:

• Recovery Time Objective (RTO): How quickly you need a service back after a disruption
• Recovery Point Objective (RPO): How much data loss (measured in time) you can tolerate

NIST ties these concepts to how you design backups and recovery capabilities. It also connects them to broader downtime tolerance, often discussed alongside maximum tolerable downtime.

A practical way to set RTO/RPO is to work backward from business impact. If your checkout system being down for 8 hours costs you real revenue, your RTO probably cannot be “next business day.” On the other hand, if an internal reporting dashboard can stay down for 48 hours without harming customers, you do not need to over-engineer it.

Finally, list disaster types you plan for. Do not stay vague.

Common categories to include:

• Cyberattacks: Ransomware, credential compromise, and destructive malware
• Natural Disasters: Flooding, storms, and regional outages
• Human Error: Accidental deletion, misconfigurations, and bad patches
• Hardware Failure: Storage crashes and networking failures

This section is the heart of your disaster recovery plan. Write yours so a tired person at 2 a.m. can follow it without guessing what you meant. Use short steps, clear owners, and explicit validation checks.

Define what counts as a “disaster” versus a “major incident.” For example, you might activate the plan when a critical service stays down past a defined threshold, when you confirm ransomware spread, or when the primary environment becomes inaccessible.

Document your first communications:

• Internal Alert: Who gets paged, by what tool, and in what order
• Leadership Notification: Facts to you include, such as impact, scope, or next update time
• External Messaging: Who approves it and what channels you use

However, avoid over-promising. Early updates should emphasize what you know, what you are doing next, and when the next update lands.

Create runbooks per system, not one giant IT paragraph. Each runbook should include:

• Prerequisite: Access needed, credentials, and break-glass accounts
• Restore Method: Backup restore, snapshot rollback, and replication failover
• Dependencies: Identity first, then databases, and then apps
• Verification Tests: Login works, transaction process, and data looks current

If you use failover, specify the trigger. In contrast, if you plan to rebuild, specify where the “known good” images/configs live. Tie each path back to RTO/RPO so you do not pick a slower method by accident.

Your plan should explain how you run the business while recovery continues. That might mean:

• Switching users to a DR environment
• Running in a reduced-capability mode
• Restricting access while you validate integrity

Spell out what changes for users. For example: “Users must use this alternate URL,” or “File uploads stay disabled until validation completes.” The less you leave to interpretation, the calmer the response feels.

Recovery is not finished when systems boot. You need reconciliation:

• Validate Data Integrity: Checksums, record counts, and app-level sanity tests
• Confirm Security Posture: Containment, credential resets, and logging
• Document What Changed: Configs, patches, and emergency access used

Then plan the return: how you cut back from DR to primary, how you avoid split-brain scenarios, and how you confirm transactions did not duplicate or vanish.

A disaster recovery plan that never gets tested becomes a document you hope works. Testing turns hope into evidence, and maintenance keeps the evidence from expiring.

Testing catches the quiet failure points: missing permissions, stale contact lists, steps people interpret differently, and recovery timelines that seem realistic until you actually run them. Use more than one test type because each one proves something different.

NIST guidance on contingency planning emphasizes aligning backup and recovery activities with your recovery objectives, and that logic applies directly to testing: test the pieces that protect RTO/RPO first.

A schedule that usually works:

• Quarterly tabletops for different scenarios, such as ransomware, cloud outage, or site loss
• Semiannual simulations for your most critical services
• Annual full interruption (if feasible) for the systems where downtime risk justifies it

On the other hand, if you run highly regulated workloads or strict uptime commitments, you may need more frequent validation. Uptime Institute’s reporting on costly outages shows why organizations push for stronger resilience work over time.

Plan reviews should not be random. Treat them like patching: routine, with extra reviews triggered by change.

Trigger an immediate review when:

• A test uncovers a gap, such as a failed restore step, unclear owner, or wrong dependency order
• You make major IT changes, like a new identity provider, app migration, or new backup tooling
• You activate the plan for a real event, even a partial activation

Also, set a baseline cadence. Many teams review quarterly for contact/role accuracy and do deeper revisions annually for architecture and recovery method changes.

You can write a long document and still end up unprepared. These pitfalls show up over and over:

• Treating disaster recovery as an IT-only project. The business still needs comms, vendors, and operating procedures.
• Setting unrealistic RTOs/RPOs because they “sound good,” not because the environment can meet them.
• Writing procedures in vague language (“restore the server”) instead of step-by-step actions with owners.
• Storing the plan somewhere inaccessible during an outage. No offline copy or break-glass access.
• Skipping testing, then discovering missing permissions, expired credentials, untested restores, or overlooked third-party dependencies during a real incident

Writing a complete disaster recovery plan takes real time, and it also takes a platform that can meet the recovery targets you set. You can define a 2-hour RTO all day, but you still need the replication, backups, and operational muscle to hit it consistently.

At OTAVA, we help teams turn recovery goals into workable systems. We support business resilience with managed disaster recovery (DRaaS) designed to minimize downtime and recover confidently, plus backup options that protect critical workloads like Microsoft 365. If you want a recovery plan that fits your risk profile, contact us. We can help you set priorities, ground your RTO/RPO targets in reality, and test the plan so it works under pressure.