Why using backup controlfile

Maximum possible data recovery 3, 4: I tested the same effect in the Oracle After restoring to the control file backup, the system will prompt you to apply the control file backup. Archive logs and stop if not. It is also the most likely to recover data. It can be concluded that if there is an old database backup, use the recover database or recover database using backup controlfile if the archived logs and online logs are all intact.

No data is lost. If the archived log or online log active, current is lost after the backup data file is restored, you can restore to the previous archived log that was lost.

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Assuming that you enabled the control file autobackup feature for the target database, you can restore an autobackup of the control file. Because the autobackup uses a default format, RMAN can restore it even though it does not have a repository available that lists the available backups.

You can restore the autobackup to the default or a new location. Because you are not connected to a recovery catalog, the RMAN repository contains only information about available backups at the time of the control file backup. Because the repository is not available when you restore the control file, you must use the SET DBID command to identify the target database.

The DBID is used to determine the location of control file autobackups. You are not connected to a recovery catalog and want to restore the control file or server parameter file. You are connected to a recovery catalog and want to restore the control file, but the database name is not unique in the recovery catalog. To recover the database with an autobackup of the control file without a recovery catalog:.

You can also obtain it by inspecting saved RMAN log files, querying the catalog, or looking at the filenames of control file autobackup. You can restore the control files that stores the physical structure of the database. Before you restore, you must locate the file. When you locate the files, ensure that the database is in the Open state. Follow these steps:.