A question about restoring from cold backup(control file backup not clear)

Hi,
I had another question about restoring the cold backup. My database is in noarchivelog mode and after taking a consistent cold backup, all I need to do is to restore the backup right? -Why I got this question is because: when I backup my control file to trace, I see statements like this:-----
-- Commands to re-create incarnation table
-- Below log names MUST be changed to existing filenames on
-- disk. Any one log file from each branch can be used to
-- re-create incarnation records.
-- ALTER DATABASE REGISTER LOGFILE '/uo1/app1/arch1_1_647102958.dbf';
-- Recovery is required if any of the datafiles are restored backups,
-- or if the last shutdown was not normal or immediate.
RECOVER DATABASE
-- Database can now be opened normally.
ALTER DATABASE OPEN;
My database is in noarchivelog mode now so don't know why these statements (of register the logfile) is there in the backup of control file? so when I restore the cold backup of this database, it will still work correct? (there is no logfile I have only CRD files in cold backup -no archive log files.)
thanks
Nirav

Thanks for your inputs! It is most useful to me.
Regards
Nirav

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A question about restoring from an old Time Machine backup

My computer has been acting very slow and freezing frequently lately. The spotlight background processess keep hogging the processor, and
It keeps getting catalog b-Tree corruption. I've already done one complete reformat of my drive and a restore from a time machine backup hoping it would fix things, and that didn't work.
I tried a complete reinstall and used the migration assistant to move all my files and settings from my time machine back over to it.
That worked for about a week, then had b-Tree corruption that could only be fixed with disk warrior.
I was suspecting a hardware problem, but I have done thourogh tests of my Ram with memtest from single user mode, and a disk surface scan with Tech Tool Deluxe. Everything checks out.
I am thinking there is some corrupt system file or setting that is getting reinstalled from my Time machine backup that is messing things up.
This all is a leadup to my question:
I would like to try restoring from a much older Time Machine back up (6 months ago or so before I started experiencing problems).
If I do that, can I still use Time Machine to restore individual files and directories from later backups?
I'd like my system settings and applications to be from six months ago, but my desktop files and documents to be from my most recent backup.
Thanks,
-Matt

Yeah, I usually check the FAQs before posting a question.
They do talk about how to restore from an older back up, but not about what happens to your newer files once you have done it. They also talk about accessing files from another computer's time machine backup, but its not clear if that would work on a different fork of the same machine.
I may just have to learn from experience, but I don't want to risk losing any data.
I do recommend time machine though. Its saved me several times.
If anyone else has experience with this let me know.
Thanks,
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Question about restoring from Time Machine backup because of new SSD

Hi,
I have a 15" Late 2011 MacBook Pro running 10.10.1 with a Toshiba hard drive inside. I want to replace the Toshiba HDD with a Crucial MX100 SSD. I use a Time Capsule to backup. After I install the SSD, I would want to restore my data to the new SSD using my Time Capsule, but I have a few questions:
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4) How do I install Recovery HD on my new SSD?
5) Please tell me all tips you have about this entire process.
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Mike

The ability to load OS X Internet Recovery is provided by firmware independent of the SSD. Just make sure your MBP has the latest firmware, which was released years ago.
You won't need a separate step to install OS X. Answered more completely in (2).
Merely format the SSD Use Mac OS X Extended (Journaled) and as many partitions as you desire. One is sufficient.
Only Crucial can answer that. You might be better off purchasing a SSD from a company known to support Macs, such as OWC / MacSales. I have several of their SSD products and haven't had to devote a moment of thought to Trim.
That's done by virtue of the Recovery firmware. It will recognize that no Recovery partition exists and will create one, after which you won't have to use OS X Internet Recovery (though it will remain an option).
If you obtain your SSD from OWC that's really all you need to know. Mechanically, it's not much more complicated than installing memory. As far as recovering the original HD's contents, restoring from the Time Machine backup is also straightforward. TM doesn't know and doesn't care that it's a SSD.

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Restore from cold backup (rac server)

Hi All,
Oracle version : 10g
OS : SunOS dixie1 5.10 Generic_118855-36 i86pc i386 i86pc
I am having cold backup of RAC server (2 nodes), I want to restore from cold backup.
The problem is that : when i performed the cold backup using rman at that time Oracle was having 3 ASM diskgroups.But unforunately that disk is no more in use due to some fault.
Now my question is how can i restore from the cold backup as when i'll restore from the cold backup this will ask for the same ASM diskgroups.Even more if i creates the same diskgroup with the same name and same configuration then my doubt is that rman will allow me to restore the same from the cold backup as ASM disk header changed now ?
Thanks,
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VipinK wrote:
Hi All,
Oracle version : 10g
OS : SunOS dixie1 5.10 Generic_118855-36 i86pc i386 i86pc
I am having cold backup of RAC server (2 nodes), I want to restore from cold backup.
The problem is that : when i performed the cold backup using rman at that time Oracle was having 3 ASM diskgroups.But unforunately that disk is no more in use due to some fault.
Now my question is how can i restore from the cold backup as when i'll restore from the cold backup this will ask for the same ASM diskgroups.Even more if i creates the same diskgroup with the same name and same configuration then my doubt is that rman will allow me to restore the same from the cold backup as ASM disk header changed now ?
Yes.You can do these and restore/recover your database.First you need startup your ASM instance then create your ASM disk groups and do following:
1.Edit pfile and change controlfile location to diskgroup(Consder that +dgr1)
2.Restore controlfile to this disk group using backup of controlfiles(you say that is cold backup)
rman target /
/*Instance need starting up from pfile*/
startup nomount ;
/*then restore controlfile,give full path of controlfile from coldbackup*/
restore controlfile from 'coldbackup_location\coltrolfile';
alter database mount;
catalog start with 'coldbackup_location';
backup as copy database format '+dgr1';
switch database to copy;
alter database open;

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Firefox 2 versions use the file bookmarks.html to store the bookmarks.
See http://kb.mozillazine.org/Backing_up_and_restoring_bookmarks_-_Firefox
See also http://kb.mozillazine.org/Transferring_data_to_a_new_profile_-_Firefox
With Mac OS X 10.4 you can use Firefox 3.5 or 3.6
* http://www.mozilla.com/firefox/all.html
* http://www.mozilla.com/firefox/all-older.html
*http://www.mozilla.com/en-US/firefox/system-requirements.html
*http://www.mozilla.com/firefox/system-requirements-v3.html

Restore Backup control file doubt ?

when restoring backup control file why we need to set the DBID first?
Thankx..

When using a recovery catalog and attempting to restore a lost control file, you encounter an error if there are other databases are registered in the recovery catalog with the same name as your target database. To resolve this error, you must uniquely identify the database by DBID for the restore operation. This requires determining the correct DBID for your database, and then using the SET DBID command to identify the target database before the RESTORE CONTROLFILE.

Control File Backups

Hello-
I was looking over some configurations that was setup by another DBA.
There are 3 control files created but they all are on the same disk/directory.
Control file auto backup is on to tape.
If there was a hardware failure and all three control were corrupted/lost then a backup would be used but
full recovery and RESETLOGS would be needed which would lead to redo data loss.
If I configured 1 control file on a seperate disk. I would be able to copy this one and create 3 files again and the database
would be started again without needing recovery if all else was fine.
If the control keeps track of redo logs SCN, Archive logs history and RMAN backups when these change then wouldn't another control file backup/ trace need to be done ?
Control File Trace only alllows to rebuild the database not to copy. How often is the need to taken ? Every change in the database ?
Backup to the Flash Recovery is another backup not an updated copy to copy from but to restore/recovery with.
Do have have these theories correct and my best setup would to send at least one to another disk.
Thanks-

If there was a hardware failure and all three control were corrupted/lost then a backup would be used but
full recovery and RESETLOGS would be needed which would lead to redo data loss. No. If you lose all three controlfiles, you either
a. RESTORE a backup of the controlfile
OR
b. CREATE CONTROLFILE (from a script)
In either case, you do NOT need to do an INCOMPLETE Recovery. You will be doing a COMPLETE Recovery (if you have the Online Redo Logs). However, an OPEN RESETLOGS is still required. The %r in the log_archive_format since 10g allows ArchiveLogs to be retained through ResetLogs.
If the control keeps track of redo logs SCN, Archive logs history and RMAN backups when these change then wouldn't another control file backup/ trace need to be done ? If you RESTORE the controlfile you lose no information. However, you still have to OPEN RESETLOGS.
If you do a CREATE CONTROLFILE, yes, you lose information about ArchiveLogs history and RMAN Backups.
You can issue a CATALOG command to re-catalog available Backups.
Control File Trace only alllows to rebuild the database not to copy.A Control File Trace is to recreate the Controlfile. Not rebuild the database.
Backup to the Flash Recovery is another backup not an updated copy to copy from but to restore/recovery with. I don't understand what your statement or question might be here.
Hemant K Chitale
http://hemantoracledba.blogspot.com
Edited by: Hemant K Chitale on Mar 2, 2011 2:44 PM
Edited by: Hemant K Chitale on Mar 2, 2011 2:45 PM

Need a help: how to recover using backup control file?

Please a help:
First computer
1. I create a database
2. put it in archive mode,
3. shutdown and made a cold backup
4. Created backup control file (alter database backup control file to trace)
5. I started up and created some archived log files.
Second Computer
1. I copied all files created in the step 3 above except the control file
2. I create all the same map directory on the 2nd computer as in the 1st computer
3. I recreate the control file from the script got in the step 4 above
4. I Copy archived log files generated at the step 5 in the local directory in the second computer
5. I set the logsource and set the autorecovery to on
6. I recover the database: RECOVER DATABASE USING BACKUP CONTROL FILE UNTIL CANCEL
Error got:
the archived log file applied do not go beyond the first one?,How could I do to applied all archived log files copied from the first computer to the second computer to have the same data?
Thank you very much

archived log sequeces in the first computerSQL> select sequence#,first_change#,next_change# from v$log_history;
SEQUENCE# FIRST_CHANGE# NEXT_CHANGE#
1 553723 555484
2 555484 557345
Actions I did in the second Computer(after copied the former two archived log files from the 1st computer)
SQL> CREATE CONTROLFILE REUSE DATABASE "ORCL" RESETLOGS ARCHIVELOG
2 MAXLOGFILES 16
3 MAXLOGMEMBERS 3
4 MAXDATAFILES 100
5 MAXINSTANCES 8
6 MAXLOGHISTORY 292
7 LOGFILE
8 GROUP 1 'C:\ORACLE\PRODUCT\10.2.0\ORADATA\ORCL\REDO01.LOG' SIZE 50M,
9 GROUP 2 'C:\ORACLE\PRODUCT\10.2.0\ORADATA\ORCL\REDO02.LOG' SIZE 50M,
10 GROUP 3 'C:\ORACLE\PRODUCT\10.2.0\ORADATA\ORCL\REDO03.LOG' SIZE 50M
11 -- STANDBY LOGFILE
12 DATAFILE
13 'C:\ORACLE\PRODUCT\10.2.0\ORADATA\ORCL\SYSTEM01.DBF',
14 'C:\ORACLE\PRODUCT\10.2.0\ORADATA\ORCL\UNDOTBS01.DBF',
15 'C:\ORACLE\PRODUCT\10.2.0\ORADATA\ORCL\SYSAUX01.DBF',
16 'C:\ORACLE\PRODUCT\10.2.0\ORADATA\ORCL\USERS01.DBF'
17 CHARACTER SET WE8ISO8859P1
18 ;
Control file created.
SQL> archive log list;
Database log mode Archive Mode
Automatic archival Disabled
Archive destination USE_DB_RECOVERY_FILE_DEST
Oldest online log sequence 0
Next log sequence to archive 0
Current log sequence 0
SQL> alter database archivelog;
Database altered.
SQL> set logsource C:\local_destination1_orcl
SQL> set autorecovery on;
SQL> recover database using backup controlfile until cancel;
ORA-00279: change 555611 generated at 01/18/2007 14:14:14 needed for thread 1
ORA-00289: suggestion :
C:\LOCAL_DESTINATION1_ORCL\ARCH.1_1_612194518_43F17CF5.ARC
ORA-00280: change 555611 for thread 1 is in sequence #1
ORA-00328: archived log ends at change 555483, need later change 555611
ORA-00334: archived log:
'C:\LOCAL_DESTINATION1_ORCL\ARCH.1_1_612194518_43F17CF5.ARC'
Idon't know where the change 555611 is coming from?

Recovery using backup control file

Hello friends,
I have a scenario where i am unable to recover by database by using backup control file option can u pls give ur expert advice.
1) Database is working in ARCHIVE MODE.
2) One of my file was READ ONLY when i take my closed backup. At this time
v$log file output is :
group# thread# sequence# bytes member arc status first_change#
1 1 8 8192 2 yes inactive 4697463
2 1 9 8192 2 yes active 4717493
3 1 10 8192 2 no current 4717738
3) After 2-3 log switches i have made it READ WRITE.
4) After making it READ WRITE i have taken controlfile backup by using
ALTER SYSTEM BACKUP CONTROLFILE TO 'E:\ORACLE\CONTROL01.CTL';.
5) Again i have make some log switches.
6) Shutdown my database using SHUTDOWN option.
7) Copy my SYSTEM,UNDO,USER,INDEX datafiles from my backup (taken at
step 2) and CONTROL file (taken at step 4).
8) I have not copied my old redo log files so those are new.
9) I mount database & then use this command to recover database :
RECOVER DATABASE USING BACKUP CONTROLFILE AUTO;
10) My recovery process starts applying archived log files and applied upto
sequence no 9. When it starts applying last one 10 which is online redo log
and not yet archived my recovery process fails by giving this error:
ORA-00308: cannot open archived log 'd:\oracle\oradata\practice\archive\1_10.dbf'
ORA-27041: unable to open file
OSD-04002: unable to open file
O/S-Error: (OS 2) The system cannot find the file specified.
11) I try to open database using :
ALTER DATABASE OPEN RESETLOGS;
it gives following warning:
Error at line 1:
ORA-01113: file 1 needs media recovery
ORA-01110: datafile 1: 'D:\ORACLE\ORADATA\PRACTICE\SYSTEM01.DBF'
Please guide me why it is so ?
Whether in BACKUP CONTROL FILE CASES system didn't recognise ONLINE REDO LOG FILES or it is anything else.
Regards
Sethi

Hi,
>>I am not using RMAN. I am taking user managed backups. Moreover i have tried what u said that make checkpoints also but again i came to the same result when it try to apply last archived log which was current redo log when database was started to shutdown it says unable to find the specified file & then when i open database using resetlogs it says system file needs media recovery.
it show error because you are using wrong approach of Recovery.
Alter database open Resetlog command is used only in incomplete recovery.
but your are giving
Recover database command,it means ur performing full recovery (means you have apply online redo logfile.) and after applying it you should open the database with Alter database Open command.
No need to give resetlog option.
Again Restore all backup;
Issue Recover database;
and open the database with
Alter database open;
Thanks
Kuljeet Pal Singh

A question about restoring from cold backup(control file backup not clear)

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