Hitachi 9960, 9900 Series Glossary, Data Duplication, Data Migration, Disaster Recovery, Downtime

Glossary

DD

Disk Director.

Data Duplication

Software that duplicates data as in remote copy or Point-in-Time (PiT) snapshots. Data duplication is differentiated from data migration in that with data duplication at the end of the process there are two copies of data and with data migration there is only one.

Data Migration

Software that migrates data from one storage device to another. This feature is different from data duplication in that at the end of the process there is only one copy of data.

Disaster Recovery

Disaster Recovery is the profession that plans to avoid disasters and to restore services after a disaster. The level of preparedness to respond to an interruption in services by implementing a disaster recovery plan to restore an organization's critical business functions.

Downtime

A planned or unplanned interruption in system availability. Planned downtime is usually for scheduled system maintenance and unplanned downtime usually includes business interruptions or disasters. See also Business Interruptions, Disaster Recovery, Business Continuity Planning (BCP), and Availability.

DR

Disaster Recovery.

DRR

Data Recovery and Regeneration.

DSS

Decision Support Systems is a term that refers to computer systems used in the areas of business intelligence such as data warehousing, data mining, OLAP, and others.

DTA

Data Adapter.

ECC

Error correction code.

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