The following figure illustrates the Backup object list.
Figure 6 - 1. Backup Object List
| Tablespace | Name of the tablespace. |
| Size (K) | Size of the tablespace (in kilobytes). |
| Backup Status | Status of the tablespace: ONLINE, Offline, or Ready for Backup (marked for online backup). |
| Started | Time the online tablespace backup started. |
Tablespaces that are offline can be backed up at any time, so there is no need to mark offline tablespaces for online backup.
After you have marked a tablespace as ready for backup, you can back up the datafiles that belong to the tablespace. You must back up the datafiles through your operating system. You can use the Datafiles folder in the Storage drawer to identify all datafiles belonging to a tablespace.
Attention: In order to perform an online backup, you must be operating in ARCHIVELOG mode. See the Oracle7 Server Administrator's Guide for information about ARCHIVELOG mode.
Additional Information: For information about performing backups on your operating system, see your platform-specific Oracle documentation.
Once you have completed your backup of the tablespace, mark the end of the backup. To mark the completion of an online tablespace backup, choose End Online Backup from the Backup menu.
Attention: If you forget to indicate the end of an online tablespace backup and subsequently shut down the database, Oracle assumes that media recovery is necessary at the next instance startup. Recovery may require the use of the archived redo log files.