Disaster
Recovery includes policies and procedures aimed at protecting an organization
from human or naturally triggered disruptions on the IT infrastructure. It
plays a significant role in the prevention of data losses, financial
consequences, loss of trustworthiness and organizational reputation. A Disaster
Recovery Plan includes the measures that an organization should take to swiftly
recover its IT systems.
Disaster
recovery can be considered as a subset of business continuity. In order to
design a proper disaster recovery strategy, risk assessment and business impact
analysis need to be completed. These steps help in identifying the information
technology services that can support the critical business activities of the
organization. Again, these steps would also help in bringing the recovery point
objectives and recovery time objectives. Disaster recovery measures can be
classified mainly into three types:
Preventive
measures
Corrective
measures
Detective
measures
Preventive
measures aim at preventing an event from occurring. Corrective measures are for
correcting a system in case of a negative event or disaster. Detective measures
focus on detecting and discovering negative events.
Disasters are inevitable but mostly unpredictable, and they vary in type and magnitude. The best strategy is to have some kind of disaster recovery plan in place, to return to normal after the disaster has struck. For an enterprise, a disaster means abrupt disruption of all or part of its business operations, which may directly result in revenue loss. To minimize disaster losses, it is very important to have a good disaster recovery plan for every business subsystem and operation within an enterprise.
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