Trying to recover from a disaster

It is difficult to explain... the entire chain of disasters, largely due to bad practices. I'd appreciate a lot of help

We (really, we had...) a server Oracle 10g 10.2.0.1 6 databases running on it. We did backups RMAN bands to each other using Symantec Netbackup. The script was like this:

RUN {}
ALLOCATE CHANNEL ch00 TYPE 'SBT_TAPE ';
BACKUP
BACKUP %
FORMAT ' bk_u % u_s % s_p % p_t % you
DATABASE;
SQL 'alter system archive log current';
OUTPUT CHANNEL ch00;
# Backup all archive logs
ALLOCATE CHANNEL ch00 TYPE 'SBT_TAPE ';
BACKUP
FILESPERSET 20
FORMAT ' arch-s % s-p % p'
REMOVE ALL ARCHIVELOG ENTRY;
OUTPUT CHANNEL ch00;
# Backup control files
ALLOCATE CHANNEL ch00 TYPE 'SBT_TAPE ';
BACKUP
FORMAT "ctrl_u % u_s s_p p_t %t % %.
CURRENT CONTROLFILE;
OUTPUT CHANNEL ch00;
}

Last week the server crashed down, due to problems of phisycal on hard drives, and we could not get it to the top. Then restore the databases from scratch since the backup tapes that we have.
We had the RMAN catalog on the same server database... so we lost too much and we can't use ir to restore.
We cannot use the dbid because we don't know them and we cannot see them on the server.
In order to obtain the control files of the backup, another way to restore of databases, we reviewed documentation and it says it takes to use the name of the control file. The control file name problem is the same in all databases, so RMAN always return the last database saved file.
Perhaps the first thing to do is to restore the database with RMAN, but I don't ' know if it is possible in this situation.

To will be appreciated. Thank you very much

Hello
Now, I understand your question. It seems that the format for the controlfile doesn't generate the same name.

-rw - SYSTEM SYSTEM 7340032 jul 10 12 ctrl_us_pt:------.
-rw - SYSTEM SYSTEM 7340032 jul 10 12 ctrl_us_pt:------.
-rw - SYSTEM SYSTEM 7340032 jul 10 12 ctrl_us_pt:------.
-rw - SYSTEM SYSTEM 9175040 Jun 09 12 ctrl_us_pt:------.
-rw - SYSTEM SYSTEM 8650752 Jun 09 12 ctrl_us_pt:------.
-rw - SYSTEM SYSTEM 7340032 Jun 09 12 ctrl_us_pt:------.

You can try to restore the controlfiles from backup items.
as:

RUN {}
ALLOCATE CHANNEL ch00 TYPE 'SBT_TAPE ';
RESTORE CONTROLFILE to ' / tmp/test_1.ctl ' to 'bk_uh9mh1p66_s553_p1_t756081862 ';
OUTPUT CHANNEL ch00;
}

Only songs that contain the system01.dbf will have a backup controlfile so (if controlfile autobackup is off) so try several pieces.
Here some results a test of a bunch of restoration by using the above script.

If the piece has no controlfile:
- - - -
From restoration to 19 - AUG - 2011:15:51:40

channel tc1: restoring controlfile
output channel: tc1
RMAN-00571: ===========================================================
RMAN-00569: = ERROR MESSAGE STACK FOLLOWS =.
RMAN-00571: ===========================================================
RMAN-03002: failure of the restore command to 2011-08-19 15:53:28
ORA-19615: some files not found in the backup set
ORA-19613: datafile 0 not found in the backup set

- - - -
If the room contains a controlfile:

From restoration to 19 - AUG - 2011:15:55:03

channel tc1: restoring controlfile
channel tc1: full restoration
Finished restoring to 19 - AUG - 2011:15:55:18
- - - -

Kind regards
Tycho

Edited by: tychos August 19, 2011 15:57

Tags: Database

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