A hard drive fails. A ransomware attack locks every file on the network. A laptop with the only copy of the accounting records gets stolen from a car. A cloud service the business depends on goes down for a day. None of these are exotic scenarios — they're common, everyday events, and the businesses that recover quickly from them are almost always the ones that had a plan written down before it happened, rather than the ones improvising in the moment.
What a Disaster Recovery Plan Actually Covers
A disaster recovery plan is a documented, specific answer to the question "if we lost access to a given system or piece of data right now, what would we actually do?" It's narrower than a full business continuity plan, which covers the whole business's ability to keep operating; disaster recovery focuses specifically on IT systems and data — getting your systems, software, and information back after a disruption, whatever caused it.
A good plan identifies the systems and data the business actually depends on, defines how quickly each needs to be restored, documents exactly how backups work and where they're stored, and lays out the specific steps someone would follow to execute a recovery, rather than leaving it to be figured out under pressure.
Start by Identifying What Actually Matters
Not every system needs the same level of protection, and treating them all identically usually means either overspending on low-priority systems or underprotecting critical ones. Walk through the business and identify what would actually stop operations if it disappeared — accounting and financial records, customer and order data, email and communication systems, point-of-sale or e-commerce platforms, and any proprietary files or designs central to the business. For each one, ask two questions: how much data loss could the business tolerate (measured in time — an hour of lost transactions versus a week), and how long could the business function without that system being restored. These two answers, known formally as recovery point objective and recovery time objective, drive almost every other decision in the plan.
Backups: The Foundation Everything Else Depends On
None of this works without reliable backups, and "reliable" is doing a lot of work in that sentence. A widely used standard is the 3-2-1 rule: keep at least three copies of important data, on two different types of storage media, with at least one copy stored off-site or in the cloud, physically separate from your primary systems. This protects against the scenarios that destroy a single backup location — a fire, a theft, or a ransomware attack that encrypts everything reachable on the same network, including a backup drive left plugged in.
Backups that have never been tested are not a real safety net. Schedule periodic test restores — actually recovering a file or system from backup, not just confirming the backup job ran — because backup failures are frequently invisible until the moment you desperately need the backup to work and discover it doesn't.
Documenting the Actual Recovery Steps
The plan itself should be specific enough that someone other than the one person who understands the systems could follow it under stress. That means documenting exactly where backups live and how to access them, login credentials or where to securely retrieve them, vendor and provider contact information for any outsourced systems, a clear order of restoration priority when multiple systems are down, and specifically who is responsible for each step. A plan that only exists in one employee's head is not a plan — it's a single point of failure disguised as one.
Accounting for Ransomware Specifically
Ransomware deserves particular attention because it's now one of the most common disaster scenarios small businesses actually face, and it behaves differently than a simple hardware failure. A ransomware plan should specifically address isolating infected systems immediately to prevent spread, restoring from backups that were disconnected or otherwise isolated from the network at the time of infection (since connected backups are frequently encrypted too), and having a predetermined position on whether the business would ever consider paying a ransom, ideally worked out calmly in advance with legal counsel rather than decided in a panic during an active incident.
Keeping the Plan Current
A disaster recovery plan written once and never revisited becomes inaccurate as systems, vendors, and staff change. Review it at least annually, and update it any time you adopt a new critical system, switch vendors, or bring on new staff who'd need to execute part of the plan. A short annual test — even just walking through the plan on paper and confirming contact information and access details are still accurate — catches the gaps before an actual incident does.
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