IT Disaster Recovery Planning: The Complete Guide

A plain-English guide to getting back to work fast when your technology fails

Picture this. It’s 8:15 on a Monday morning. The kettle’s on, the team’s arriving, and nobody can log in. The phones are down. Someone’s holding up a laptop with a message demanding payment.

Or maybe it’s quieter: a server that just stopped, a leak above the comms cupboard, or a file someone deleted by mistake that turns out to be the one you need.

Whatever the cause, the same questions come up in the same order. How long are we stuck? What have we lost? Who do I call?

An IT disaster recovery plan is simply your answers to those questions, written down before you need them. This guide walks you through building one in plain English. You don’t need to be technical, and if you are (or you have an IT team), look out for the “For your IT team” notes along the way. There’s a free template and checklist further down.

We’re Mother Technologies, an IT support company helping businesses across Aberdeen, Edinburgh and the rest of Scotland. What follows comes from what we see when things go wrong, and what makes the difference.

The short version

  • Disaster recovery is about getting your people working again quickly, not just saving files.
  • Backups alone aren’t a plan. A plan covers who does what, in which order, and who you tell.
  • Two questions drive everything: how long can we be without this, and how much recent work can we afford to lose?
  • A plan you’ve never tested is a hope. Practice it.
  • Start small. A simple one-page plan beats a perfect one that never gets written.

What is IT disaster recovery?

IT disaster recovery is your plan for getting back to work after something goes wrong with your technology. It covers your computers, systems, data, internet and phones: what you’ll restore, in what order, how long it should take and who’s responsible.

A “disaster” doesn’t have to be dramatic. It’s anything that stops your team doing their jobs for longer than you can afford, like:

  • A ransomware or phishing attack
  • A server or laptop failing
  • Someone deleting something they shouldn’t have, by accident or on purpose
  • A power cut or an internet outage
  • A flood, fire or storm hitting your office
  • A supplier or cloud service going down
  • A software update that breaks something important

Most disasters are surprisingly ordinary: a dead hard drive, a link clicked in a hurry, a water leak. They’re not rare, and they’re every bit as expensive as the dramatic ones.

Disaster recovery, backups and business continuity: what's the difference?

People mix these up all the time. Think of your business as a house.

TermWhat it meansIn house termsIn your business
BackupA spare copy of your dataA photo of everything you own, kept at a relative's houseLast night's copy of your files, stored somewhere else
Disaster recoveryThe plan for getting your IT working againThe checklist for rebuilding after a fire: who you call, what you replace firstRestoring your systems in the right order, within a set time
Business continuityKeeping the whole business runningStaying with family while the house is repairedStaff working from home while the office is sorted

Backups are one part of disaster recovery, and disaster recovery is one part of business continuity. Having backups but no plan is a bit like owning a spare tyre with no idea where the jack is.

Why does your business need a disaster recovery plan?

Because when it happens, you’ll be making decisions while stressed, short of time and short of information. A plan means you’ve already made the hard decisions calmly.

Here’s what it gets you:

  1. Less time stuck. Instead of a confused scramble, your team follows a clear order of recovery.
  2. Less money lost. Every hour offline costs sales, wasted wages and customer patience.
  3. A better answer to ransomware. If you can restore from clean backups, criminals have far less leverage over you.
  4. Fewer legal worries. Under UK GDPR you must keep personal data secure, and if a breach puts people at risk you may need to tell the ICO within 72 hours. That’s a tight deadline when you’re also trying to run a business.
  5. Easier conversations with insurers, auditors and customers. More and more of them ask whether you have a tested plan.
  6. A calmer team. People cope much better in a crisis when they know what their job is.
  7. An edge when you’re winning work. Tenders in areas like education, housing and finance often ask about resilience.

Two questions that shape your whole plan

Before you get into the detail, answer these for each of your main systems (email, phones, your accounts software, your customer database, whatever you rely on):

  1. How long can we manage without it?
  2. How much recent work can we afford to lose?

Here’s how that might look for a typical office. Your answers will be different, and that’s the point.

SystemHow long can we manage without it?How much recent work could we lose?What that means in practice
Phones30 minutesNoneNeeds a backup route that switches on fast
Email4 hours1 hourNeeds to be back within the morning
Accounts software1 working day1 dayA nightly backup is fine
Old project archivesA weekA weekA weekly backup will do

For your IT team: these are your RTO (recovery time objective) and RPO (recovery point objective). Using the plain-English versions with directors and managers makes it much easier to get agreement, and budget.

Be honest when you answer. “Everything back in 15 minutes” sounds great until you see the price tag. Faster recovery costs more, so this conversation is really about where your money does the most good.

How to create an IT disaster recovery plan: 9 steps

Step 1: Pick an owner (and a deputy)

This is a business decision, not just an IT job. Choose someone senior who’s accountable, and someone to cover for them. Plans fall apart when they live in one person’s head and that person is on holiday.

For your IT team: make sure someone outside IT also has the authority to declare an incident and approve spend, so you’re not waiting for sign-off while systems are down.

Step 2: List what you’ve got

You can’t recover what you’ve forgotten about. Write down:

  • Computers, laptops and servers
  • Network kit like your firewall, wifi and routers
  • Cloud services and apps (Microsoft 365, accounting, CRM, anything specific to your industry)
  • Where your important data lives, including that one spreadsheet everybody quietly depends on
  • Your internet and phone providers, with support numbers and account details
  • Who looks after each thing 

A useful trick: ask each team, “What do you open first thing every morning?” You’ll often find things IT never knew about.

Step 3: Work out what would hurt most

Take each system and ask: “If this disappeared on Monday morning, what would happen?” Then sort them into groups.

  • Can’t operate without it: work stops. Think internet, phones, your main business application and logins.
  • Painful: a big slowdown, but you can work around it. Think email, shared files and your customer database.
  • Annoying: you’d cope for a few days. Think internal tools and older files.
  • Can wait: nobody would notice for a week. Think test systems and rarely used archives.

Then think about what’s most likely to go wrong for you: phishing and ransomware, a hardware failure, a broadband outage, severe weather, a supplier problem. Deal with what’s both likely and damaging first.

For your IT team: this is your risk assessment and business impact analysis. The four groups map neatly onto recovery tiers.

Step 4: Decide how fast each one needs to be back

Use the two questions from earlier: how long can we be without it, and how much recent work can we lose? Set a target for each group.

Then check the targets are affordable. If a director says “everything back in 15 minutes”, show them the price. It usually leads to a sensible chat about what truly needs that.

Step 5: Choose how you’ll recover

Match each group to a way of getting back up and running.

  • Restore from backup (lowest cost): rebuild on new or repaired kit, then copy your data back. Good for things that can wait.
  • Cloud recovery (medium cost): a copy of your systems sits in the cloud, ready to switch on. Good for important systems.
  • Standby systems (higher cost): a second, always-updated setup that’s ready to take over. Good for the things you can’t operate without.
  • Instant failover (highest cost): a duplicate setup running side by side that switches over automatically. Very few small businesses need this.

For most small and medium-sized businesses, solid backups plus cloud recovery for the few systems that really matter gives the best balance of cost and protection. If you’re weighing up your options, we can talk you through.

Step 6: Get your backups right

Everything else depends on your backups. A good rule to follow is 3-2-1-1-0:

  • 3 copies of your data
  • 2 different types of storage
  • 1 copy stored away from the office
  • 1 copy that can’t be changed or deleted, even by an attacker (offline or “immutable”)
  • 0 surprises, because you’ve actually tested restoring from them

Two traps we see a lot. First, assuming Microsoft 365 or Google look after backups the way you’d need. They keep the service running, but that doesn’t protect you from everything, like accidental deletion, a hacked account or a mistake you only spot months later. Second, keeping backups on the same network as everything else, where ransomware can reach them.

Step 7: Write it down for a stressed person

Your plan should be usable at 3 a.m. by someone who didn’t write it. Keep it short and plain. Include:

  • Who’s in charge, with their phone numbers
  • When to call something an incident
  • The order you’ll bring systems back
  • Step-by-step instructions for your key systems
  • Who to tell and when
  • Supplier contacts
  • How you’ll keep working in the meantime

Where you keep it matters. If your plan lives only on the server that just died, it’s no use to anyone. Keep a printed copy and an offline copy.

For your IT team: these step-by-step instructions are your runbooks. A good test is whether a competent colleague could follow them cold.

Step 8: Plan what you’ll say

In a crisis, poor communication can do almost as much damage as the technical problem. Get these ready in advance:

  • A message for staff: what’s happened, what to do, and when the next update is coming
  • A message for customers: calm, honest and brief
  • A back-up way to reach people if email and Teams are down, such as a WhatsApp group, a text service or a phone tree
  • A decision on who reports to the ICO if personal data might be affected, so the 72-hour clock doesn’t catch you out

Step 9: Practise, then improve

A plan you’ve never tested is a hope. Put practice in the diary.

  • Every month: restore a few files to check your backups really work.
  • Every three months: restore a whole system to prove you can rebuild it properly.
  • At least twice a year: have a “what if” conversation. Sit round a table and talk through a scenario, like ransomware on a Monday morning.
  • Once a year: switch to your recovery systems to test your cloud or standby setup.

After every practice or real incident, ask three things: What went well? What surprised us? What do we change? Review the whole plan once a year, and whenever you change a major system, move office or lose someone key.

Mistakes we see all the time

  1. Backups nobody has ever restored: Plenty of businesses find out their backups are incomplete only when they need them.
  2. Backups that ransomware can reach: Keep at least one copy somewhere an attacker can’t touch.
  3. No clear owner: If everyone’s responsible, nobody is.
  4. Promises you can’t keep: Saying “back in an hour” without the technology to deliver it.
  5. Forgetting the people: Technology is only half of recovery. Your team needs to know what to do.
  6. Forgetting your suppliers: Your plan is only as strong as your internet provider, your software vendor and your hosting partner.
  7. Letting the plan go stale: New systems, new starters and new suppliers soon make an old plan wrong.
  8. Keeping the plan in one place: If it’s on the system that failed, you can’t read it.

Do you need an IT disaster recovery policy as well as a plan?

Usually, yes, but it can be short. A policy is a short statement from management that says disaster recovery matters and sets the ground rules: what gets backed up, how often, who’s responsible and how often you test. The plan is the detailed how-to that sits underneath it.

Smaller businesses can combine the two in one document. But a signed-off policy makes it much easier to get budget and to show insurers, auditors and customers you take it seriously. There’s a sample policy statement in the template below.

Download your Free disaster recovery template