Data Recovery Advisor feature helps in diagnosing and repairing data failures. It will automatically diagnose the issue and provides the recommendation for the repair that helps to resolve the data failure quickly.
The Data Recovery Advisor can diagnose and repair a range of data failures that includes (Corrupted blocks, missing datafiles, Control file failures, missing archived redo logs).
Connect to rman client:
[oracle@reyno ~]$ rman target/Recovery Manager: Release 19.0.0.0.0 – Production on Tue Feb 7 10:02:56 2023
Version 19.3.0.0.0
Copyright (c) 1982, 2019, Oracle and/or its affiliates. All rights reserved.
connected to target database: REYNALDO (DBID=1338893540, not open)
List failure:
- Lists the failures in the database.
RMAN> list failure;
using target database control file instead of recovery catalog
Database Role: PRIMARY
List of Database Failures
=========================
Failure ID Priority Status Time Detected Summary
———- ——– ——— ————- ——-
842 HIGH OPEN 07-FEB-23 One or more non-system datafiles are missing
Advise failure:
- Provides the necessary action for repairing the failures.
RMAN> advise failure;
Database Role: PRIMARY
List of Database Failures
=========================
Failure ID Priority Status Time Detected Summary
———- ——– ——— ————- ——-
842 HIGH OPEN 07-FEB-23 One or more non-system datafiles are missing
analyzing automatic repair options; this may take some time
using channel ORA_DISK_1
analyzing automatic repair options complete
Mandatory Manual Actions
========================
no manual actions available
Optional Manual Actions
=======================
- If file /u01/app/oracle/oradata/REYNALDO/datafile/o1_mf_users_kwd0s1wc_.dbf was unintentionally renamed or moved, restore it
Automated Repair Options
========================
Option Repair Description
————————
1 Restore and recover datafile 7
Strategy: The repair includes complete media recovery with no data loss
Repair script: /u01/app/oracle/diag/rdbms/reynaldo/reynaldo/hm/reco_1469010506.hm
Repair failure preview:
- Shows the content of the script to repair the failure.
RMAN> repair failure preview;
Strategy: The repair includes complete media recovery with no data loss
Repair script: /u01/app/oracle/diag/rdbms/reynaldo/reynaldo/hm/reco_1469010506.hm
contents of repair script:
# restore and recover datafile
restore ( datafile 7 );
recover datafile 7;
sql ‘alter database datafile 7 online’;
Repair failure:
- Executes the script to repair the failure.
RMAN> repair failure;
Strategy: The repair includes complete media recovery with no data loss
Repair script: /u01/app/oracle/diag/rdbms/reynaldo/reynaldo/hm/reco_1469010506.hm
contents of repair script:
# restore and recover datafile
restore ( datafile 7 );
recover datafile 7;
sql ‘alter database datafile 7 online’;
Do you really want to execute the above repair (enter YES or NO)? YES
executing repair script
Starting restore at 07-FEB-23
using channel ORA_DISK_1
channel ORA_DISK_1: starting datafile backup set restore
channel ORA_DISK_1: specifying datafile(s) to restore from backup set
channel ORA_DISK_1: restoring datafile 00007 to /u01/app/oracle/oradata/REYNALDO/datafile/o1_mf_users_kwd0s1wc_.dbf
channel ORA_DISK_1: reading from backup piece /u01/app/oracle/fast_recovery_area/REYNALDO/backupset/2023_02_07/o1_mf_nnndf_TAG20230207T095014_ky3ncym6_.bkp
channel ORA_DISK_1: piece handle=/u01/app/oracle/fast_recovery_area/REYNALDO/backupset/2023_02_07/o1_mf_nnndf_TAG20230207T095014_ky3ncym6_.bkp tag=TAG20230207T095014
channel ORA_DISK_1: restored backup piece 1
channel ORA_DISK_1: restore complete, elapsed time: 00:00:01
Finished restore at 07-FEB-23
Starting recover at 07-FEB-23
using channel ORA_DISK_1
starting media recovery
media recovery complete, elapsed time: 00:00:00
Finished recover at 07-FEB-23
sql statement: alter database datafile 7 online
repair failure complete
Do you want to open the database (enter YES or NO)? YES
database opened
