Cross-Checking Backups

Cross-checking a backup synchronizes the physical reality of backups with their logical records in the RMAN repository. For example, if a backup on disk was deleted with an operating system command, then a cross-check detects this condition. After the cross-check, the RMAN repository correctly reflects the state of the backups.

Backups to disk are listed as available if they are still on disk in the location listed in the RMAN repository, and if they have no corruption in the file header. Backups on tape are listed as available if they are still on tape. The file headers are not checked for corruption. Backups that are missing or corrupt are listed as expired.

To cross-check individual files:

1. On the Database Home page, click Availability to display the Availability subpage.

2. In the Manage section, click Manage Current Backups.

   The Manage Current Backups page appears.

3. Search for the backup sets or image copies whose contents you want to cross-check.

4. In the Results section, select each backup to be included in the cross-check operation.

   Database Control does not support selecting both image copies and backup sets for a cross-check within a single operation.

5. Click Crosscheck at the top of the Results list.

   A confirmation page is displayed. After you click Yes, Database Control performs the cross-check.

To cross-check all files:

1. On the Database Home page, click Availability to display the Availability subpage.

2. In the Manage section, click Manage Current Backups.

   The Manage Current Backups page appears.

3. In the Manage Current Backups page, click Crosscheck All.

   The Crosscheck All: Specify Job Parameters page appears. You can schedule the cross-check to run now or later, or specify regularly scheduled cross-checks.

4. Click Submit Job.