From BCMpedia. A Wiki Glossary for Business Continuity Management (BCM) and Disaster Recovery (DR).
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1. Disaster Recovery as a Service or DRaaS is the replication and hosting servers (physical or virtual) by a third-party to provide failover during a man-made or natural incident, emergency or disaster.

Notes (1): DRaaS is a recovery service that is utilisation-based.

Notes (2): DRaaS can be used to restore customer data, business applications and system configurations

Notes (3): In deploying DRaaS, servers identified as mission critical can be set to recover instantly while servers with less critical data might be set to recover at a longer Recovery Time Objective (RTO).

Notes (4): DRaaS is sometimes referred to as Storage as a services and Infrastructure as a service (IaaS).

Related Term: Data Protection/Recovery Strategy - Category, Disaster Recovery, Cloud-based Disaster Recovery, Recovery as a Service.

BCMBoK Competency Level
BCMBoK 4: Business Continuity Strategy CL 1B: Foundation (BC)

BCMBoK Competency Level
BCMBoK 4: Business Continuity Strategy CL 1D: Foundation (DR)

(Source: Business Continuity Management Institute - BCM Institute)

A Manager's Guide to Managing and Implementing Your IT Disaster Recovery Plan (2010) BUY!

Courses: IT DR Certification