Cross Checks of RMAN Backups and Copies
Performing a cross check provides you with a way to ensure that data about backup sets and image copies in the RMAN repository is synchronized with corresponding data on disk or in the media management catalog.
You can use the LIST command to obtain a report of the backups and copies that you have made and then use the CROSSCHECK command to check that these files still exist. If RMAN cannot find a file, it updates the repository records to EXPIRED. You can determine which files are marked EXPIRED by issuing a LIST EXPIRED command....
Recovery Manager Reference is intended for database administrators who perform
the following tasks:
- Back up, restore, and recover Oracle databases
- Perform maintenance on backups and copies of database files
To use this document, you need to know the following:
- Relational database concepts and basic database administration as described in
Oracle Database Concepts and the Oracle Database Administrator's Guide
- Basic RMAN concepts and tasks as described in Oracle Database Backup and
- The operating system environment under which you are running Oracle...
The recovery catalog is a schema that is created in a separate database. It contains the RMAN metadata obtained from the target database control file. RMAN propagates information about the database structure, archived redo logs, backup sets, and datafile copies into the recovery catalog from the control file of the target database.
You should use a catalog when you have multiple target databases to manage.
RMAN stores, uses, and maintains the information in the recovery catalog. The recovery catalog is maintained by RMAN when you do the following: