Restore Any Lost Datafile with Flashback Database Technology -2

Hi,

I will continue to explain datafile restore with Flashback Database Technology in Oracle in this article.

https://salihdeveci.files.wordpress.com/2019/01/prsentation-oracle-database-11g-23-728.jpg

 

Read previous article before this.

 

 

In the previous article we have restored tablespace and datafile with Flashback. But we have taken errors when query the data, and now let’s go to fix these errors.

 

 

 

 

7-) Not lets go to change datafile mode as offline and then online.

 

SQL> select * from v$recover_file;

FILE# ONLINE  ONLINE_

---------- ------- -------

ERROR                                                                CHANGE#

----------------------------------------------------------------- ----------

TIME

---------

7 OFFLINE OFFLINE

FILE NOT FOUND                                                             0

8 OFFLINE OFFLINE

UNKNOWN ERROR                                                        1857557

25-FEB-15

FILE# ONLINE  ONLINE_

---------- ------- -------

ERROR                                                                CHANGE#

----------------------------------------------------------------- ----------

TIME

---------

9 OFFLINE OFFLINE

UNKNOWN ERROR                                                        1859232

25-FEB-15

 

 

 

 

Change tablespace mode as offline.

 

SQL> alter tablespace ts offline immediate;

Tablespace altered.

 

 

 

Change tablespace mode as online.

SQL> alter tablespace ts online;

alter tablespace ts online

*

ERROR at line 1:

ORA-01190: control file or data file 9 is from before the last RESETLOGS

ORA-01110: data file 9: '/u01/app/oracle/oradata/deneme/ts_01.dbf'


 

8- But since there is inconsistency in our datafile, we cannot get it online mode. For this we will get help from rman recovery advisor.

 

 

 

 

We will recover and open database on RMAN Data Recovery Advisor. With this tool, Firstly perform list failure, then Advise failure step and then perform Repair failure like following.

 

[oracle@MehmetSalih ~]$ rman target /

Recovery Manager: Release 11.2.0.4.0 - Production on Wed Feb 25 11:42:59 2015

Copyright (c) 1982, 2011, Oracle and/or its affiliates.  All rights reserved.

connected to target database: DENEME (DBID=1985990806)


RMAN> list failure;

List of Database Failures

=========================

Failure ID Priority Status    Time Detected Summary

---------- -------- --------- ------------- -------

348        HIGH     OPEN      25-FEB-15     One or more non-system datafiles need media recovery

452        HIGH     OPEN      25-FEB-15     One or more non-system datafiles are offline

427        HIGH     OPEN      25-FEB-15     One or more non-system datafiles are missing





RMAN> advise failure;

List of Database Failures

=========================

Failure ID Priority Status    Time Detected Summary

---------- -------- --------- ------------- -------

348        HIGH     OPEN      25-FEB-15     One or more non-system datafiles need media recovery

452        HIGH     OPEN      25-FEB-15     One or more non-system datafiles are offline

427        HIGH     OPEN      25-FEB-15     One or more non-system datafiles are missing

analyzing automatic repair options; this may take some time

allocated channel: ORA_DISK_1

channel ORA_DISK_1: SID=36 device type=DISK

analyzing automatic repair options complete

Not all specified failures can currently be repaired.

The following failures must be repaired before advise for others can be given.

Failure ID Priority Status    Time Detected Summary

---------- -------- --------- ------------- -------

348        HIGH     OPEN      25-FEB-15     One or more non-system datafiles need media recovery

427        HIGH     OPEN      25-FEB-15     One or more non-system datafiles are missing

Mandatory Manual Actions

========================

no manual actions available

Optional Manual Actions

=======================
  1. If you restored the wrong version of data file /u01/app/oracle/oradata/deneme/tb_01.dbf, then replace it with the correct one
  2. If you restored the wrong version of data file /u01/app/oracle/oradata/deneme/ts_01.dbf, then replace it with the correct one
  3. If file /u01/app/oracle/product/11.2.0.4/db/dbs/UNNAMED00007 was unintentionally renamed or moved, restore it
Automated Repair Options

========================

Option Repair Description

------ ------------------

1      Restore and recover datafile 7; Recover datafile 8; Recover datafile 9

Strategy: The repair includes complete media recovery with no data loss

Repair script: /u01/app/oracle/diag/rdbms/deneme/deneme/hm/reco_3656126672.hm







  RMAN> repair failure;

Strategy: The repair includes complete media recovery with no data loss

Repair script: /u01/app/oracle/diag/rdbms/deneme/deneme/hm/reco_3656126672.hm

contents of repair script:

# restore and recover datafile

restore datafile 7;

recover datafile 7;

# recover datafile

recover datafile 8, 9;

Do you really want to execute the above repair (enter YES or NO)? YES

executing repair script

Starting restore at 25-FEB-15

using channel ORA_DISK_1

creating datafile file number=7 name=/u01/app/oracle/product/11.2.0.4/db/dbs/UNNAMED00007

restore not done; all files read only, offline, or already restored

Finished restore at 25-FEB-15

Starting recover at 25-FEB-15

using channel ORA_DISK_1

starting media recovery

archived log for thread 1 with sequence 2 is already on disk as file /u01/app/oracle/fast_recovery_area/DENEME/archivelog/2015_02_25/o1_mf_1_2_bgv509dy_.arc

archived log for thread 1 with sequence 1 is already on disk as file /u01/app/oracle/fast_recovery_area/DENEME/archivelog/2015_02_25/o1_mf_1_1_bgv5d0sy_.arc

archived log file name=/u01/app/oracle/fast_recovery_area/DENEME/archivelog/2015_02_25/o1_mf_1_2_bgv509dy_.arc thread=1 sequence=2

archived log file name=/u01/app/oracle/fast_recovery_area/DENEME/archivelog/2015_02_25/o1_mf_1_1_bgv5d0sy_.arc thread=1 sequence=1

archived log file name=/u01/app/oracle/fast_recovery_area/DENEME/archivelog/2015_02_25/o1_mf_1_1_bgv5vhq4_.arc thread=1 sequence=1

media recovery complete, elapsed time: 00:00:00

Finished recover at 25-FEB-15

Starting recover at 25-FEB-15

using channel ORA_DISK_1

starting media recovery

archived log for thread 1 with sequence 1 is already on disk as file /u01/app/oracle/fast_recovery_area/DENEME/archivelog/2015_02_25/o1_mf_1_1_bgv5d0sy_.arc

archived log file name=/u01/app/oracle/fast_recovery_area/DENEME/archivelog/2015_02_25/o1_mf_1_1_bgv5d0sy_.arc thread=1 sequence=1

archived log file name=/u01/app/oracle/fast_recovery_area/DENEME/archivelog/2015_02_25/o1_mf_1_1_bgv5vhq4_.arc thread=1 sequence=1

media recovery complete, elapsed time: 00:00:01

Finished recover at 25-FEB-15

repair failure complete

RMAN> exit

 

 

 

 

 

 

9-) Now problem has been solved, we can query related table and data like following. We have been recovered lost or dropped datafile via Flashback database and RMAN tool.

 

[oracle@MehmetSalih ~]$ sqlplus / as sysdba

SQL*Plus: Release 11.2.0.4.0 Production on Wed Feb 25 11:44:13 2015

Copyright (c) 1982, 2013, Oracle.  All rights reserved.

Connected to:

Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production

With the Partitioning, OLAP, Data Mining and Real Application Testing options



SQL> alter tablespace ts online;

Tablespace altered.




SQL> select * from ts.ts;

ID

----------

10

 

Mehmet Salih Deveci

I am Founder of IT Tutorial and Certified Expert about Oracle & SQL Server database, Goldengate, Exadata Machine, Oracle Database Appliance administrator with 10+years experience.I have OCA, OCP, OCE RAC Expert Certificates I have worked 100+ Banking, Insurance, Finance, Telco and etc. clients as a Consultant, Insource or Outsource.I have done 200+ Operations in this clients such as Exadata Installation & PoC & Migration & Upgrade, Oracle & SQL Server Database Upgrade, Oracle RAC Installation, SQL Server AlwaysOn Installation, Database Migration, Disaster Recovery, Backup Restore, Performance Tuning, Periodic Healthchecks.I have done 2000+ Table replication with Goldengate or SQL Server Replication tool for DWH Databases in many clients.If you need Oracle DBA, SQL Server DBA, APPS DBA,  Exadata, Goldengate, EBS Consultancy and Training you can send my email adress mehmetsalih.deveci@outlook.com.-                                                                                                                                                                                                                                                 -Oracle DBA, SQL Server DBA, APPS DBA,  Exadata, Goldengate, EBS ve linux Danışmanlık ve Eğitim için  mehmetsalih.deveci@outlook.com a mail atabilirsiniz.

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