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How do I restore my autofile from Controlfile?
To restore the control file from autobackup, the database must be in a NOMOUNT state. As shown in Example 20-2, you must first set the DBID for your database, and then use the RESTORE CONTROLFILE FROM AUTOBACKUP command.
How do I restore a Controlfile to a different location?
You can restore the control file from a known control file copy using this form of the command: RMAN> RESTORE CONTROLFILE from ‘filename’; The control file copy found at the location specified by filename will be written to all locations listed in the CONTROL_FILES initialization parameter.
How do I restore using RMAN?
Start RMAN and connect to the target database. Run the STARTUP FORCE NOMOUNT command. Run the SET DBID command to distinguish this connected target database from other target databases that have the same name. Run the RESTORE CONTROLFILE command.
How do you recover a lost control file?
To restore a backup control file to its default location:
- If the instance is still running, shut it down: SQL> SHUTDOWN ABORT.
- Correct the hardware problem that caused the media failure.
- Restore the backup control file to all locations specified in the CONTROL_FILES parameter.
- Start a new instance and mount the database.
What happens if control file is lost?
If the control files are missing, then the database cannot be mounted, so at most, the database state is nomount. Any attempt to mount will fail because of the missing files. No problem, we’ll use the command to create a control file from trace.
How do I change my fast recovery area?
To change the location of the flash recovery area, enter the following command at the SQL Command Line prompt: ALTER SYSTEM SET DB_RECOVERY_FILE_DEST = ‘new_path’; where new_path is an absolute path to the new directory for the flash recovery area. The path must exist.
How to restore a control file from autobackup?
To restore the control file from autobackup, the database must be in a NOMOUNT state. You must first set the DBID for your database, and then use the RESTORE CONTROLFILE FROM AUTOBACKUP command. Example 20-2 Setting the DBID and Restoring the Control File from Autobackup
Is there a way to restore a control file?
One way to restore the control file to one or more new locations is to change the CONTROL_FILES initialization parameter, and then use the RESTORE CONTROLFILE command with no arguments to restore the control file to the default locations.
How to restore the controlfile using RMAN?
1. Restore controlfile from autobackup. RMAN> restore controlfile from autobackup; 2. Restore controlfile from a specific backup piece. RMAN> restore controlfile from ‘/backup_dir/piece_name’; 3. Restore controlfile from most recent available controlfile backup.
What to do if you dont have a controlfile backup?
If you cannot go through step 2 because you don’t have any controlfile backup, you can’t go further with RMAN, that’s it. But there is another way to get a controlfile back to work. Not having the spfile is annoying, but it’s just a subset of instance parameters, not really important stuff for your data.