DRaaS Explained: Disaster Recovery Without Owning a Second Data Center

DRaaS, Disaster Recovery as a Service, helps your business recover systems after a major outage using cloud infrastructure and a planned recovery process. Instead of building and staffing a second data center, you pay for a recovery setup sized to your needs.

For many small and mid-size businesses, that can be a practical middle ground: stronger recovery than backups alone, without keeping a full duplicate environment running around the clock.

WHAT DRaaS DOES, AND WHAT IT DOESN’T

A backup gives you copies of data to restore. DRaaS is a broader recovery service. Depending on the design and provider, it can include replicated systems, cloud capacity, recovery automation, monitoring, a runbook, and scheduled failover tests.

Those terms aren’t interchangeable:

• Traditional backup: Copies data on a schedule. After an incident, you restore the data and rebuild or restart systems. This can be cost-effective, but recovery may take hours or days.
• DRaaS: Keeps an agreed set of workloads recoverable in a cloud environment. Some resources may already be running; others start during recovery. Your recovery time depends on the design, the provider’s scope, and how well the plan has been tested.
• Hot standby: A recovery environment that is already running and closely synchronized with production. It can support faster failover, but you’re paying to maintain more ready-to-use capacity. Hot standby can be part of a DRaaS service, or something you operate yourself. It is not automatically what every provider means by “DRaaS.”

DRaaS also isn’t the same as high availability. High availability is designed to keep a service running through common component failures, such as one server going down. Disaster recovery addresses larger disruptions, such as a regional cloud outage, a destroyed site, or a serious incident affecting production systems.

RTO AND RPO, IN PLAIN ENGLISH

Two targets help you understand what a recovery plan promises:

• RTO (Recovery Time Objective): How long can a system be unavailable before the business impact is unacceptable?
• RPO (Recovery Point Objective): How much recent data can you afford to lose, measured in time?

Imagine your order system goes down at 2 p.m. An RTO of two hours means the goal is to have it available again by 4 p.m. An RPO of 15 minutes means you may have to recreate up to 15 minutes of recent transactions.

The following are broad planning examples, not guarantees. Actual results vary with workload size, application dependencies, network capacity, automation, and testing:

Tighter targets usually cost more. A faster RTO requires recovery capacity and a well-practiced process. A tighter RPO generally requires more frequent replication. Replication alone, however, is not a substitute for backups: it can also copy unwanted changes or corruption.

For an accessible overview of recovery strategies and objectives, see AWS’s disaster recovery guidance.

WHAT “MISSION CRITICAL” MEANS FOR AN SMB

Mission critical doesn’t mean every system deserves the fastest, most expensive recovery option. It means a system whose unavailability stops an important business activity.

For an SMB, that may be two or three systems, such as:

• The storefront, booking platform, or point-of-sale system that takes orders and payments.
• The finance, inventory, or operations application needed to fulfill orders and bill customers.
• Identity and network services employees need to access those applications.

Ask a simple question: If this system were unavailable until tomorrow, what revenue, customer commitments, or business operations would stop? If the answer is “not much,” it may not need a hot standby. If you can’t take orders, dispatch jobs, or access customer records, it may need a tighter recovery target.

THE REAL COST: SECOND SITE OR CLOUD RECOVERY?

Owning a second site involves more than buying duplicate servers. You need space, power and cooling, connectivity, security, equipment maintenance, software, replication, testing, and people to operate the environment. Even a small, properly equipped site can require substantial upfront capital. As a broad planning estimate, a small owned secondary site may involve seven figures in facility investment and tens of thousands of dollars per month in operating costs, depending on size, staffing, equipment, and location.

Colocation can avoid building the facility, but you still pay for rack or power capacity, hardware, networking, software, support, and testing. The total varies significantly with how much equipment you need ready at the recovery site.

Cloud DRaaS usually shifts more of that expense to a monthly subscription and usage charges. As an order-of-magnitude example, planning estimates for a managed DRaaS environment covering roughly 20–50 virtual machines can land around $2,500–$8,000 per month. Some services are priced per protected machine, often cited around $50–$200 per VM per month, with storage, recovery compute, network use, testing, and management potentially billed separately. These are market planning ranges, not a quote.

To compare options fairly, ask for a full estimate that includes what you’ll pay during normal operation and during a recovery. Cloud compute, data transfer, retention, support coverage, and testing can all affect the bill. The right choice depends on your workload and downtime costs, not a generic “cheapest” number.

PROTECT THE MOST IMPORTANT SYSTEMS FIRST

You don’t need to recover everything at once. A tiered plan lets you match protection to business impact:

• Tier 1, Revenue stops: Identify the few systems that stop sales or essential operations. Consider DRaaS with a defined recovery target, application-aware replication, and tested failover.
• Tier 2, Work slows: Protect systems employees can work around temporarily. Scheduled backups and a slower restore target may be enough.
• Tier 3, Can wait: Keep secure backups and restore these systems after the urgent services are available.

Keep separate, recoverable backups even when you replicate systems to the cloud. Then document how applications depend on each other. A database might recover, for example, but users still can’t do their work if identity, networking, or a connected application is missing.

Five 9’s infrastructure consulting covers cloud infrastructure, reliability, and disaster recovery planning. Our AWS DR approach is one example of a multi-region active-passive design. Its stated RTO and RPO are design targets, not a contractual uptime guarantee; real results depend on deployment and operations.

TEST THE RECOVERY, NOT JUST THE BACKUP

A backup report can say “successful” while the restored application still fails. A DR plan needs a repeatable test of the full recovery path.

Run a failover drill in an isolated environment where possible. Confirm that systems start in the right order, users can sign in, the application works, and the recovered data is valid. Record how long each step takes, compare the result with your RTO and RPO, and update the runbook when something changes. Plan how you’ll return to normal operations, too.

Common traps to watch for:

• Backups that were never restored: You don’t know they’ll work until you test the recovery.
• Replication without application consistency: A copied disk may not represent a usable database or coordinated application state. Ask how the provider handles databases and multi-tier systems.
• No runbook: People under pressure need clear instructions, contacts, access details, dependencies, and decision authority, not assumptions.
• A test that skips the business check: A server can boot while the application remains unusable. Involve the people who know what “working” means to your customers and staff.

QUESTIONS TO ASK A DRaaS PROVIDER

1. Which specific systems, dependencies, and data are included in the proposed scope?
2. What RTO and RPO do you propose for each workload, and how will you measure them?
3. Is replication application-consistent for our databases and business applications?
4. What does the monthly price include, and what costs extra during a failover or test?
5. How often do you test recovery, and do we receive results and remediation steps?
6. Who owns the runbook, approves failover, and handles failback?
7. How will our internal team learn the process and stay able to operate it?

A provider should be clear about limitations and assumptions. If a requirement falls outside its core expertise or the service scope, you should hear that before signing, not during an outage.

START WITH AN HONEST CONVERSATION

You don’t need to start by buying a second data center or protecting every system equally. Start by identifying the two or three systems that stop revenue, deciding how much downtime and data loss you can tolerate, and testing whether you can actually recover them.

We can help you assess your current environment, compare practical options, and define a plan that can adapt as your business changes. Visit our infrastructure services or contact us for an honest, no-pressure conversation. We’ll explain what makes sense, what it may cost, and where we can help, without turning the discussion into a sales pitch.