How can I recover my datafile?

How to recover missing datafiles?

  1. Find the missing datafiles:
  2. Take tablespace or datafiles offline:
  3. Rename missing datafiles with original files:
  4. Shutdown and mount the database:
  5. Perform media recovery:
  6. Open the database:
  7. check the status of datafiles:
  8. Bring the datafiles online:

How can I recover a single datafile in Oracle?

Steps

  1. First find the missing/corrupted datafile belongs to which tablespace.
  2. Take the datafile offline.
  3. Restore the datafile.
  4. Recover the datafile.
  5. Bring the datafile online; SQL> alter database datafile ‘/u01/app/oracle/oradata/mydb/mydb_tbs01.dbf’ online;

How can I recover multiple datafiles using RMAN?

RMAN Media Recovery: Basic Steps

  1. Place the database in the appropriate state: mounted or open.
  2. To perform incomplete recovery, use the SET UNTIL command to specify the time, SCN, restore point, or log sequence number at which recovery terminates.
  3. Restore the necessary files with the RESTORE command.

Which command is used for RMAN database recovery?

The DBA enters the following commands in the RMAN client: RESTORE DATABASE; RECOVER DATABASE; RMAN then queries the repository, which in this example is a recovery catalog. RMAN then decides which backup sets to restore, and which incremental backups and archived logs to use for recovery.

How do I restore a DBF file in Oracle?

SQL> RECOVER DATAFILE ‘path’; Oracle checks for the archive redo log files that it needs to apply and displays the names of the files in a sequence. Enter AUTO in the SQL*Plus prompt screen to apply the files. After each log is applied, Oracle continues to apply the next redo log file until the recovery is complete.

How do I drop Missing datafile in Oracle?

alter database open; drop tablespace ts_name; In the above steps, you tell Oracle that the missing datafile is now missing (offline drop). You should then be able to open the database.

What is difference between restore and recovery in Oracle?

Restoring involves copying backup files from a secondary storage (backup media) to disk. This can be done to replace damaged files or to copy/move a database to a new location. Recovery is the process of applying redo logs to the database to roll it forward.

How do I restore my datafile from standby?

Steps to fix the issue :

  1. On the primary database, take backup of all the datafiles which reside on /u05/PROD/ mountpoint.
  2. Transfer the backup pieces to the standby database.
  3. On the physical standby database, catalog the backuppieces.
  4. Stop redo apply/MRP on the physical standby database.

Where are RMAN backups stored?

Backups in this case are stored with generated unique filenames in the location /tmp/backups/ . Note that the %U , used to generate a unique string at that point in the filename, is required.

How do I restore a DBF file?

How to repair DBF

  1. Install Recovery Toolbox for DBF on your computer.
  2. Start Recovery Toolbox for DBF.
  3. Select a corrupted DBF file on the first page of the program.
  4. Click Analyze.
  5. Preview the repaired content from a source DBF file.
  6. Select file name for new recovered file.
  7. Select format of destination recovered file.

How do I open an Oracle DBF file?

Shows the Open dialog box. Select a DBF file and click Open. If you select multiple files, all of them will be opened….The filter in the Open dialog box consists of the following file extensions:

  1. DBF Files (*. DBF) – Data Base File.
  2. Memo Files (*. FPT, *.
  3. All Files (*. *) – force DBF Commander to open a non-DBF file.