Recovering System datafile with no backup.

Hello Everyone,
I am simulating a scenario where in i lost a system datafile and i dint take any back up. The database i sin archive mode.Now i wanted to recover the database.I have googled everywhere and tried different things,but i am not able to recover it. can anybody please provide me a step by step process to recover the system datafile. DO we have to recreate the database?
Thanks,
ranz_bad

ranz_dba wrote:
Hello Everyone,
I am simulating a scenario where in i lost a system datafile and i dint take any back up. The database i sin archive mode.Now i wanted to recover the database.I have googled everywhere and tried different things,but i am not able to recover it. can anybody please provide me a step by step process to recover the system datafile. DO we have to recreate the database? ranz_bad,
:Please make sure that you read the docs before attempting to create issues as most of the issues are very well documented in the docs. For the recovery of the System tablespace, you need to have a backup and if you have only one datafile in the system tablespace or first dataflie of the System tablespace is lost, you can't get it through the create datafile clause.
http://download.oracle.com/docs/cd/E11882_01/server.112/e10592/statements_1004.htm#i2079942
HTH
Aman....

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RMAN-06067: RECOVER DATABASE required with a backup or created controlfile

Hi,
DB:9.2.0.8
OS: AIX 5.3
I am restoring DB with until time(12/06/2012) for needed tablespaces.
I restored the 12th date controlfile ,which is backed up with archivedlogs. I also have one more controlfile which backed up with full DB..
Restore of tablespaces are completed..
When recovery is going , failed with following error..
allocated channel: c7
channel c7: sid=22 devtype=SBT_TAPE
channel c7: VERITAS NetBackup for Oracle - Release 5.1 (2006040520)
allocated channel: c8
channel c8: sid=21 devtype=SBT_TAPE
channel c8: VERITAS NetBackup for Oracle - Release 5.1 (2006040520)
executing command: SET until clause
Starting recover at 23-06-2012 02:00:15
released channel: c1
released channel: c2
released channel: c3
released channel: c4
released channel: c5
released channel: c6
released channel: c7
released channel: c8
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of recover command at 06/23/2012 03:36:57
RMAN-06067: RECOVER DATABASE required with a backup or created controlfile
RMAN>
Restore Script:
connect target /
connect catalog rmanc/recom@lgn_rmanc
run {
allocate channel c1 type 'SBT_TAPE';
allocate channel c2 type 'SBT_TAPE';
allocate channel c3 type 'SBT_TAPE';
allocate channel c4 type 'SBT_TAPE';
allocate channel c5 type 'SBT_TAPE';
allocate channel c6 type 'SBT_TAPE';
allocate channel c7 type 'SBT_TAPE';
allocate channel c8 type 'SBT_TAPE';
allocate channel c9 type 'SBT_TAPE';
allocate channel c10 type 'SBT_TAPE';
allocate channel c11 type 'SBT_TAPE';
allocate channel c12 type 'SBT_TAPE';
set until time '12-06-2012 00:01:26';
restore tablespace SYSTEM,UNDO_GEN01,UNDO_GEN02,TAB_80K_GENCON,TAB_25M_GENCON;
release channel c1;
release channel c2;
release channel c3;
release channel c4;
release channel c5;
release channel c6;
release channel c7;
release channel c8;
release channel c9;
release channel c10;
release channel c11;
release channel c12;
Recover Script:
connect catalog rmanc/recom@lgn_rmanc
connect target /
run {
allocate channel c1 type 'SBT_TAPE';
allocate channel c2 type 'SBT_TAPE';
allocate channel c3 type 'SBT_TAPE';
allocate channel c4 type 'SBT_TAPE';
allocate channel c5 type 'SBT_TAPE';
allocate channel c6 type 'SBT_TAPE';
allocate channel c7 type 'SBT_TAPE';
allocate channel c8 type 'SBT_TAPE';
set until time '12-06-2012 00:01:26';
recover tablespace SYSTEM,UNDO_GEN01,UNDO_GEN02,TAB_80K_GENCON,TAB_25M_GENCON;
release channel c1;
release channel c2;
release channel c3;
release channel c4;
release channel c5;
release channel c6;
release channel c7;
release channel c8;
Any suggestion in this is helpful to me..
Thanks in advance,

Hello;
I read your post and here's the thoughts that came to mind : ( my largest concern is you might restore something that damages your current system )
1. So you want to restore the whole DB back to 12/06/2012 to get some tablespaces from then right?
2. Are you restoring to a different system?
3. How did you start the database ( NOMOUNT, MOUNT )
4. If you are restoring the whole DB back to 12/06/2012 how did you restore the control file?
5. Your command shows :
restore tablespace SYSTEM,UNDO_GEN01,UNDO_GEN02,TAB_80K_GENCON,TAB_25M_GENCON;
COMMENT : Generally I use recover tablespace for point in time recovery and use an auxilary destination.
Meaning I don't use restore at all, in fact using restore may cause an issue.
SUMMARY : I don't see how this will work as is.
It seems you want data from five tablespaces from about six months ago including the SYSTEM tablespace.
This is an Incomplete Recovery. I believe I would rethink this completely.
Give the time that has past I would consider restoring the whole database to a different server where cannot damage anything.
Once this is done I would decide how to get the data I need.
Or I would check for a daily export file and recover the tablespace data that way.
So you have some good details on your question but it seems the plan is either missing something or you need to add a few more details.
Example
I'm recovering old tablespaces into a test system.
Here's how I'm not damaging my current production system.
I don't have an export from that date.
So take a step back and either rethink or give a few more details on how this is safe.
Best Regards
mseberg

RMAN-06067: RECOVER DATABASE required with a backup or created control file

Hi,
Oracle version :10.2.04
I recovered control files
RMAN> restore controlfile to '/oracle/ora10gr4/dbs/nis.ctl';
Starting restore at 21-AUG-12
using channel ORA_DISK_1
channel ORA_DISK_1: starting datafile backupset restore
channel ORA_DISK_1: restoring control file
output filename=/oracle/ora10gr4/dbs/nis.ctl
channel ORA_DISK_1: reading from backup piece /data_idx1/ORAMIG/OMIGTEST/cfc-260103938-20120821-03
channel ORA_DISK_1: restored backup piece 1
piece handle=/data_idx1/ORAMIG/OMIGTEST/cfc-260103938-20120821-03 tag=TAG20120821T152259
channel ORA_DISK_1: restore complete, elapsed time: 00:00:03
Finished restore at 21-AUG-12after this i got the below error when i tried to open DB.
SQL> alter database open resetlogs;
alter database open resetlogs
ERROR at line 1:
ORA-01152: file 1 was not restored from a sufficiently old backup
ORA-01110: data file 1:
'/data_idx1/ORAMIG/OMIGTEST/DATA_FILES/system_1_OMIGTEST.dbf'So i tried the following.
RMAN> restore datafile '/data_idx1/ORAMIG/OMIGTEST/DATA_FILES/system_1_OMIGTEST.dbf';
Starting restore at 21-AUG-12
using channel ORA_DISK_1
channel ORA_DISK_1: starting datafile backupset restore
channel ORA_DISK_1: specifying datafile(s) to restore from backup set
restoring datafile 00001 to /data_idx1/ORAMIG/OMIGTEST/DATA_FILES/system_1_OMIGTEST.dbf
channel ORA_DISK_1: reading from backup piece /data_idx1/ORAMIG/OMIGTEST29_1_791910787
channel ORA_DISK_1: restored backup piece 1
piece handle=/data_idx1/ORAMIG/OMIGTEST29_1_791910787 tag=TAG20120821T151306
channel ORA_DISK_1: restore complete, elapsed time: 00:00:15
Finished restore at 21-AUG-12
RMAN> recover datafile '/data_idx1/ORAMIG/OMIGTEST/DATA_FILES/system_1_OMIGTEST.dbf';
Starting recover at 21-AUG-12
using channel ORA_DISK_1
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of recover command at 08/21/2012 16:21:45
RMAN-06067: RECOVER DATABASE required with a backup or created control fileCan anyone pls help me with this error?
Thanks

Hi,
Try this command after restore control file.
RMAN> restore database;
RMAN> recover database;
RMAN> alter database open resetlogs;Paste here result, if you are get error.
Regards
Mahir M. Quluzade
www.mahir-quluzade.com

How to recover system datafile???

Hello,
Do you guys have any idea how to recover SYSTEM datafile if the datafile is missing and it's not being back up ?
suhaimi
[email protected]

Dear Suhaimi,
The only possible way of recovering the SYSTEM tablespace (and its datafiles) is from the Hot or Cold backups taken earlier. For ensure complete recoverability, I advise you to run your database in ARCHIVELOG mode and take regular online backups.
Ciao!

I completed a system restore with no backup. can i recover my files?

Hii
I completed a system recovery to factory condition and i had backed up my files too. it turns they hadnt been backed up so now i have lost all my files. Is there any way i can retrieve my files, any way at all please???

Where did you save the backup files? If they are on dvd or external usb hdd look for an .EXE file in the list. Run it to extract the files to a folder on your laptop.
If you saved backup files to the D;\Recovery partition before resetting they may be gone. Try Easeus Data Recovery on the C drive to see if any can be found:
http://www.easeus.com/datarecoverywizard/free-data-recovery-software.htm
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**Click Accept as Solution on a Reply that solves your issue to help others**

RECOVER IMAGE COPY WITH INCRMENTAL BACKUP

dear all
i want to know what this comand do
recover copy of datafile 4 with tag ' ';
is this when take backup copy to datafile and i have incremental backup
when corruption occurs i write this command
instead of restore and recovery only this command is make the restore and applay incremental backup ???
MANY THANKS

there are some recovery scenarios.
1- If you lost all datafiles
SQL> startup mount;
RMAN> restore database;
RMAN> recover database;
SQL> alter database open;
2- if you lost a tablespace
SQL> alter tablespace users offline;
RMAN> restore tablespace users;
RMAN> recover tablespace users;
SQL> alter tablespace users online;
if you can not offline tablespace then
$ sqlplus “/ as sysdba”
SQL> shutdown abort;
SQL> startup mount;
$ rman target / catalog_user/ catalog_user_password@catalogdb
RMAN> restore tablespace users;
RMAN> recover tablespace users;
SQL> alter database open;
3- if you lost a datafile
SQL> alter database datafile '/oracle/oradata/users.dbf' offline;
RMAN> restore datafile '/oracle/oradata/users.dbf'
RMAN> recover datafile '/oracle/oradata/users.dbf'
SQL> alter database datafile '/oracle/oradata/users.dbf' online;
if you cannot offline datafile then
$ sqlplus “/ as sysdba”
SQL> shutdown abort;
SQL> startup mount;
$ rman target / catalog_user/ catalog_user_password@catalogdb
RMAN> restore datafile '/oracle/oradata/users.dbf';
RMAN> recover datafile '/oracle/oradata/users.dbf';
SQL> alter database open;
4- if you lost your controlfile
$ sqlplus “/ as sysdba”
SQL> shutdown abort;
SQL> startup nomount;
$ rman target / catalog_user/ catalog_user_password@catalogdb
RMAN> set dbid = 3970640872;
RMAN> restore controlfile;
SQL> alter database mount;
SQL> alter database open;
you will receive an error ORA-01589 when you open database
ORA-01589: must use RESETLOGS or NORESETLOGS option for database open
In this situation you must do;
SQL> shutdown abort;
SQL> startup mount;
$ rman target / catalog_user/ catalog_user_password@catalogdb
RMAN> recover database;
SQL> alter database open resetlogs;
RMAN> reset database;
if you open database with resetlogs, SCN number will be zero. In this situation all previous backups will be invalid. You must full backup.
5- May be a special situation. You need to incomplete recovery.
A. Time-Based incomplete recovery;
$ sqlplus "/ as sysdba"
SQL> shutdown abort;
SQL> startup mount;
$ rman target / catalog_user/ catalog_user_password@catalogdb
RMAN> restore database until time "to_date('06/05/11 12:0:00','DD/MM/YY HH24:MI:SS')";
RMAN> recover database until time "to_date('06/05/11 12:0:00','DD/MM/YY HH24:MI:SS')";
SQL> alter database open resetlogs;
B. SCN-Based incomplete recovery;
$ sqlplus "/ as sysdba"
SQL> shutdown abort;
SQL> startup mount;
$ rman target / catalog_user/ catalog_user_password@catalogdb
RMAN> restore database until scn 1000;
RMAN> recover database until scn 1000;
SQL> alter database open resetlogs;
C. archive log sequence based incomplete recovery;
$ sqlplus "/ as sysdba"
SQL> shutdown abort;
SQL> startup mount;
$ rman target / catalog_user/ catalog_user_password@catalogdb
RMAN> restore database until sequence 9923;
RMAN> recover database until sequence 9923;
SQL> alter database open resetlogs;
6- if you need some archive logs in your backup
$ rman target / catalog_user/ catalog_user_password@catalogdb
RMAN> restore ARCHIVELOG FROM TIME 'SYSDATE-1' UNTIL TIME 'SYSDATE';
Or
RMAN> restore ARCHIVELOG FROM TIME "to_date('07/11/05 00:00:01','MM/DD/YY HH24:MI:SS')
UNTIL TIME 'SYSDATE';
7- if your data block is corrupted you will receive an error below.
Hata:
ORA-01578: ORACLE data block corrupted (file # 8, block # 13)
ORA-01110: data file 8: '/oracle/oradata/users.dbf'
for recover data block;
$ rman target / catalog_user/ catalog_user_password@catalogdb
RMAN>blockrecover datafile 8 block 13;
For Block-Level Media Recovery - Concept & Example (Doc ID 144911.1)
8- if you have a image copy backup and your datafile number 2 has problems then you can switch datafile number2 to image copy.
RMAN>sql ‘alter database datafile 2 offline’;
RMAN>switch datafile 2 to copy;
RMAN>recover datafile 2;
RMAN>sql ‘alter database datafile 2 online’;

Recover the Datafile without any backup

Hi,
I am new in oracle database.
I have created a new database.
database is in no archivelog mode.
last night one of my sysaux datafile is currepted.
is there any method to repair my sysaux datafile.
the database is in mount mode.how can i open my db??
Please help
Edited by: Vaibhav Dixit on Aug 3, 2011 3:19 PM

Vaibhav Dixit wrote:
Hi,
I am new in oracle database.
I have created a new database.
database is in no archivelog mode.
last night one of my sysaux datafile is currepted.
is there any method to repair my sysaux datafile.
the database is in mount mode.how can i open my db??
Please help
You have already posted here so please note, always mention your o/s and 4 digit version number of the db with your post.
Second, with no archivelog mode and no backup, you can't do the recovery . You should dump this database and recreate a new one.
Aman....

Recovering a datafile with different initial file size

Sorry for this post. no need

OS? Database version? Noarchivelog or archivelog? At least in the latter case (archivelog) DDL commands like increasing a datafile are recorded,too.
Werner

I downloaded the iOS6 and since I have lost ALL of the data on my phone and had to start everything over. Now that I did a system restore (with no backup), I no longer have a youtube icon. I have done a reset settings in the general tab and no help.

I have tried the "reset all settings" and it did not bring the icon/app back. I have also used the search feature to see if it is 'hiding' somewhere and it is not found. Any help would be greatly appreciated. I have already lost all of my contacts and calendars, so this has been a bad day. I went to the apple store and we sppent 2 hours trying to retreive stuff but to no avail. I did not notice that the youtube app was missing when I left or I would have asked while I was there.
Thanks for your help.

There is No Pre-installed Youtube App in iOS 6.
http://itunes.apple.com/app/youtube/id544007664?mt=8

No backup loss of non system datafile how to open database

Hi
i lost my datafile with out backup how to open the database or how to backup database

Hi,
To prevent accidental lost of datafile make sure you backup your database by having suitable backup strategy.
To open the database you can follow the step described by chinar sir. For backup follow one strategy as a good practise.Check my below link for backup strategy:
http://rafioracledba.blogspot.com/2010/12/scheduling-rman-jobs-in-windows-server.html
Best regards,
Rafi.
http://rafioracledba.blogspot.com

Recovery of lost non-system datafile

Hello All,
I have simulated a test environment where I have remove one of the non-sys datafile. For this first I have took the full database backup including archivelog and then remove the datafile from OS level. After that I manually created that datafile in mount state. I put the datafile in offline mode.
When I'm trying to recover the datafile, Oracle shows me error.
Please figure me out, where I was wrong.
Below are steps which I had did.
SQL> create tablespace TTS datafile '/u01/app/oracle/oradata/test/test.dbf' size 10M;
RMAN> backup database plus archivelog;
host $ rm /u01/app/oracle/oradata/test/test.dbf
sql>startup mount
sqll> alter database create datafile '/u01/app/oracle/oradata/test/test.dbf';
sql> alter database datafile '/u01/app/oracle/oradata/test/test.dbf' offline;
sql> recover datafile '/u01/app/oracle/oradata/test/test.dbf';
ORA-00279: change 1080487 generated at 11/06/2012 11:51:50 needed for thread 1
ORA-00289: suggestion :
/u01/app/oracle/fast_recovery_area/TEST/archivelog/2012_11_06/o1_mf_1_13_%u_.arc
ORA-00280: change 1080487 for thread 1 is in sequence #13
Specify log: {<RET>=suggested | filename | AUTO | CANCEL}
AUTO
ORA-00308: cannot open archived log
*'/u01/app/oracle/fast_recovery_area/TEST/archivelog/2012_11_06/o1_mf_1_13_%u_.arc'*
ORA-27037: unable to obtain file status
Linux Error: 2: No such file or directory
Additional information: 3
Thanks,
rohit gupta
http://dbarohit.blogspot.in/

Hello John/Azar,
Thanks!
I can restore/recover the datafile from database full backup.
But in my test case, I want to recover the datafile by first creating it manually(that what I have showed).. and then trying to recover it.
I'm doing this because I have read about this steps.
John,
I've already tried to recover that datafile with RMAN, but no luck.
Below are the error message.
RMAN> recover datafile 6;
Starting recover at 06-NOV-12
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=39 device type=DISK
allocated channel: ORA_DISK_2
channel ORA_DISK_2: SID=38 device type=DISK
allocated channel: ORA_DISK_3
channel ORA_DISK_3: SID=40 device type=DISK
starting media recovery
archived log for thread 1 with sequence 17 is already on disk as file /u01/app/oracle/fast_recovery_area/TEST/archivelog/2012_11_06/o1_mf_1_17_89kdrhjx_.arc
archived log for thread 1 with sequence 18 is already on disk as file /u01/app/oracle/fast_recovery_area/TEST/archivelog/2012_11_06/o1_mf_1_18_89kphznq_.arc
unable to find archived log
archived log thread=1 sequence=13
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of recover command at 11/06/2012 15:07:53
RMAN-06054: media recovery requesting unknown archived log for thread 1 with sequence 13 and starting SCN of 1080487
regards,
rohit gupta
http://dbarohit.blogspot.in/

Recover corrupted datafile

I created database from cold backup and db is up and running. After recovery identified some datafiles has corruption with dbfsize.
Could anybody please help me how to recover corrupted datafile from cold backup?

sorry in my first message I mentioned I verified with dbfsize. It is not dbfsize it is dbv than I found some files has corruption. I db verified original backup datafiles those file are fine no corruption. The problem is while copying the files to the new location some corruption happened. Now I will try to copy original file and dbv first. Now I to recover bad datafiles? I need some steps. Thanks in advance.
Please provide your Oracle version, OS , the actual ORA- errorsOracle version is 9.2.0.7.0
OS SunOS 9
when I run dbv I got big list of errors copied portion of it....
$cat DEEFF.log |more
DBVERIFY: Release 9.2.0.7.0 - Production on Fri Feb 27 00:20:14 2008
Copyright (c) 1982, 2002, Oracle Corporation. All rights reserved.
DBVERIFY - Verification starting : FILE = /u01/oracle/DEEFF.dbf
Page 1024 is marked corrupt
Corrupt block relative dba: 0x1f400400 (file 125, block 1024)
Bad header found during dbv:
Data in bad block -
type: 6 format: 2 rdba: 0x1ac580dd
last change scn: 0x0004.f72fdb41 seq: 0x1 flg: 0x04
consistency value in tail: 0xdb410601
check value in block header: 0xb656, computed block checksum: 0x0
spare1: 0x0, spare2: 0x0, spare3: 0x0
Page 1025 is marked corrupt
Corrupt block relative dba: 0x1f400401 (file 125, block 1025)
Bad header found during dbv:
Data in bad block -
type: 6 format: 2 rdba: 0x1dc6d021
last change scn: 0x0002.f8bcf84b seq: 0x1 flg: 0x06
consistency value in tail: 0xf84b0601
check value in block header: 0x5983, computed block checksum: 0x0
spare1: 0x0, spare2: 0x0, spare3: 0x0
Page 1026 is marked corrupt
Corrupt block relative dba: 0x1f400402 (file 125, block 1026)
Bad header found during dbv:
Data in bad block -
type: 6 format: 2 rdba: 0x1e415f13
last change scn: 0x0004.3e23e1dd seq: 0x1 flg: 0x04
consistency value in tail: 0xe1dd0601
check value in block header: 0x502f, computed block checksum: 0x0
spare1: 0x0, spare2: 0x0, spare3: 0x0
Message was edited by:
Gud

How to recover saved sessions after a system recovery with backup [DUPE: /questions/770295]

Computer kept crashing and wasn't able to log on, so I had to do a system recovery with backup. Was wondering if there was anyway to get back my saved sessions that I kept.

Probably not. A System Restore can replace the current file sessionstore.js with an older version and if that happens then you lose that session unless you have made a backup of sessionstore.js before doing the system restore.

How to recover saved sessions after a system recovery with backup

Computer kept crashing and wasn't able to log on, so I had to do a system recovery with backup. Was wondering if there was anyway to get back my saved sessions that I kept.

Probably not. A System Restore can replace the current file sessionstore.js with an older version and if that happens then you lose that session unless you have made a backup of sessionstore.js before doing the system restore.

System datafile block corruption - no backups and database in NOARCHIVELOG mode

Dear All,
Database version - oracle 11.1 Enterprise
OS - RHELinux 5.8
What are the options of recovering from physical block corruption when there are no backup available to perform block media recovery?
V$DATABASE_BLOCK_CORRUPTION reports two segments corrupted (please see attached image for details).
1 table in system datafile - sys_fba_barrierscn
1 index - (applicaiton index)
What are my options?
I know there is a possibility that the database will not restart after a shutdown due to corruption in system tablespace.
Database is in noarchivelog mode. So online backups are not possible and there aren't any full backups either.
I am thinking of below,
1. Run dbms_repair with fix_block_corruption. - Still database startup might fail?
2. Shutdown the database and take offline full backup with RMAN MAXCorrupt option.
Appreciate your suggestions and advises.
Thanks
Stefan

Thanks Sybrand,
Agree with your first two suggestions .
Also scheduled a expdp job tonight. (Only backup like thing they had was a expdp cron, but until today all the large tables were failing due to small undo_retention).
Yes. Flashback is not used. So hopefully it will not affect the a database restart i guess?
Related to dbms_repair, I was referring to - http://askdba.org/weblog/2010/08/physical-corruption-ora-1578-part-3/.
Where DBMS_REPAIR.FIX_CORRUPT_BLOCKS and DBMS_REPAIR.SKIP_CORRUPT_BLOCKS used.
Which i think will not use any redo.
Thanks
Stefan

Recovering System datafile with no backup.

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