This document discusses various disaster recovery strategies for databases, including definitions, suggestions for disaster recovery plans, and comparisons of different technologies. It defines key terms like Recovery Time Objective and Recovery Point Objective. It provides overviews of failover clustering, log shipping, database mirroring and transactional replication as different options for maintaining copies of database systems. The strategies vary in their level of automation, data synchronization, and ability to failover to the standby system. Disaster recovery planning requires documenting systems, testing plans, and anticipating different failure scenarios to minimize data loss during recovery.