Definition of Terms (continued)

• Disaster Recovery

• Business function recovery between geographically separated data centers using a storage replication system between the data centers.
• The output of disaster recovery planning is a disaster recovery project plan.
• The goal is to minimize downtime for business functions, not systems.
• Business function recovery times and maximum allowable data loss is specified during the business impact analysis.

• High Availability

• Business function fail over between two or more physical frames within the same data center using a single shared storage location.
• Elimination of single points of failure (SPOF's) are a necessary part of HA.
• The goal is to minimize downtime for business functions, not computer systems.
• This is NOT non-stop computing, downtime will be experienced during fail over.

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