Home
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.
ON-Bar backup and restore system
Back up with ON-BarYou can use the ON-Bar utility to back up and verify storage spaces (dbspaces, blobspaces, and sbspaces) and logical-log files.
onbar -v syntax: Verifying backupsUse the onbar -v command to verify that backups that were created by the ON-Bar utility are complete and can be restored.
Verification failuresThe verification of a backup can fail for various reasons. If a backup fails verification, do not attempt to restore it.
Restoring when a backup is missing dataIf a backup fails verification because of missing data, you can perform a restore from an older backup.

Restoring when a backup is missing data

If a backup fails verification because of missing data, you can perform a restore from an older backup.

About this task

To restore when a backup is missing data:

Choose the date and time of an older backup than the one that failed. To perform a point-in-time verification, use the onbar -v -t time space command.
If the older backup passes verification, perform a point-in-time physical restore by using the same time value, then perform a log restore, as follows:
```
onbar -r -p -t time space
onbar -r -l
```
Expire the corrupted backup at your storage manager.
Run the onsmsync command without arguments.
The onsmsync utility removes backups that are no longer held by the storage manager from the emergency boot file and the sysutils database, preventing ON-Bar from attempting to use such backups.