DISASTER RECOVERY 101
WHAT IS DISASTER RECOVERY?
Disaster recovery is an organization’s method of regaining access and functionality to its IT infrastructure after a natural or human disaster, like equipment failure or cyber attack. A variety of disaster recovery (DR) methods can be part of a disaster recovery plan. DR is one aspect of business continuity.
HOW DOES DISASTER RECOVERY WORK?
Disaster recovery relies upon the replication of data and computer processing in an off-premises location that is not affected by the disaster. When servers go down because of a natural disaster, equipment failure, or cyber attack, a business needs to recover lost data from a second location where the data is backed up. Ideally, an organization can transfer its computer processing to that remote location as well in order to continue operations.
As cyber attacks, extreme weather events, AND EVEN PANDEMICS become more common, planning for disaster recovery becomes more critical to business continuity. A risk assessment and a business impact analysis that quantifies the potential effects of a disaster are effective tools for gaining management support for a disaster recovery plan.
WHAT ARE THE TYPES OF DR?
Businesses can choose from a variety of disaster recovery methods, or combine several:
Back-up: This is the simplest type of disaster recovery and entails storing data off site or on a removal drive. However, just backing up data provides only minimal business continuity help, as the IT infrastructure itself is not backed up.
Disaster Recovery as a Service (DRaaS): In the event of a disaster or ransomware attack, a DRaaS provider moves an organization’s computer processing to its own cloud infrastructure, allowing a business to continue operations seamlessly from the vendor’s location, even if an organization’s servers are down. DRaaS plans are available through either subscription or pay-per-use models. There are pros and cons to choosing a local DRaaS provider: latency will be lower after transferring to DRaaS servers that are closer to an organization’s location, but in the event of a widespread natural disaster, a DRaaS that is nearby may be affected by the same disaster.
Back Up as a Service: Similar to backing up data at a remote location, with Back Up as a Service, a third party provider backs up an organization’s data, but not its IT infrastructure.
Data center disaster recovery: The physical elements of a data center can protect data and contribute to faster disaster recovery in certain types of disasters. For instance, fire suppression tools will help data and computer equipment survive a fire. A backup power source will help businesses sail through power outages without grinding operations to a halt. Unfortunately, none of these physical disaster recovery tools will help in the event of a cyber attack.
Virtualization: Organizations can back up certain operations and data or even a working replica of an organization’s entire computing environment on off-site virtual machines that are unaffected by physical disasters. Using virtualization as part of a disaster recovery plan also allows businesses to automate some disaster recovery processes, bringing everything back online faster. For virtualization to be an effective disaster recovery tool, frequent transfer of data and workloads is essential, as is good communication within the IT team about how many virtual machines are operating within an organization.