Availability Problems
•Loss of the Data Center
•Network Problems
•Loss of the Server Hardware
•Disk-Related Outages
•Operating System Failure
•DBMS Software Failure
•Application Problems
•Security and Authorization Problems
•Corruption of Data
•Loss of the Database Objects
•Loss of Data
•Data Replication and Propagation Failures
•Server Performance Problems
•Recovery Issues
•DBA Mistakes
•Outages : Planed and Unplanned