Disaster Recovery

WAN-resource The terms Disaster Recovery and Business Continuity are commonly interchanged. However, there is a difference. While business continuity deals with plans and procedures of action in case of disasters, disaster recovery is the plan for post-event action. Disaster recovery details the steps that have to be taken to recover data to a point before the disruption. Major disasters occur very infrequently, but there has to be a plan to handle resulting disruptions. The most common disruption to any business is usually an unavailable Wide Area Network (WAN) or Internet connectivity. These events while usually limited in time cause major disruptions in business activity, especially in organizations that are WAN/Internet dependent. Continuous uptime is of the highest priority. Disaster Recovery is the process of continuing operations after any natural catastrophe or man-made disaster. It is the process and policies of restoring business operations such as retrieving data, applications, hardware, network communications, etc. immediately after any calamity ranging from a human-induced disaster such as a computer virus attack to a natural disaster such as flood, fire or earthquake. The Disaster Recovery process enables to recover organizations, critical data, resources and IT infrastructure that were affected due to a disaster. Disaster Recovery Planning (DRP) is a subset of Business Continuity Planning (BCP). In a disaster recovery plan, the key metrics (Recovery Point Objective (RPO) and Recovery Time Objective (RTO)) that are indicated in a business continuity plan are considered with regard to specific business processes of an organization. These are then mapped to the supporting IT infrastructure and a suitable DRP is determined for each system. The most common strategies for protecting critical data include backups, data replication, high availability systems, mirroring, among others. A comprehensive Disaster Recovery process is directed at providing end-to-end high availability solutions for companies of all sizes, including upgrade, replication systems, maintenance, and automated tools. Disaster Recovery being the process by which business is resumed after a disruptive event, gains due significance together with business continuity.