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AdministeringIn addition to administering the database server, you can tune performance, replicate data, and archive data.
Backup and Restore GuideThe HCL OneDB™ Backup and Restore Guide describes how to use the HCL® OneDB® ON-Bar and ontape utilities to back up and restore database server data. These utilities enable you to recover your databases after data is lost or becomes corrupted due to hardware or software failure or accident.
Appendixes
Troubleshooting some backup and restore errorsThis appendix lists some error and informational messages that you can receive during a backup or restore, describes under what circumstances the errors might occur or the message might appear, and provides possible solutions or workarounds.
Drop a database before a restoreIf you perform a level-0 archive using ON-Bar and a storage manager, then drop a database, and then perform a restore with the onbar -r command, the database remains dropped. The restore salvages the logs and the logs contains the DROP DATABASE statement. When the logs are salvaged, or replayed, the database is dropped. If you receive these message, you can take steps to solve the problem.

Drop a database before a restore

If you perform a level-0 archive using ON-Bar and a storage manager, then drop a database, and then perform a restore with the onbar -r command, the database remains dropped. The restore salvages the logs and the logs contains the DROP DATABASE statement. When the logs are salvaged, or replayed, the database is dropped. If you receive these message, you can take steps to solve the problem.

To prevent this situation, perform a physical restore using the onbar -r -p command, and then a logical restore using the onbar -r -l command. This sequence does not salvage the logs and does restore the database.