Re: Restoring 64 bit database to 32 bit Server

  • From: "goran bogdanovic" <goran00@xxxxxxxxx>
  • To: jkstill@xxxxxxxxx
  • Date: Sat, 9 Sep 2006 23:07:23 +0200

Hi Jared,

I think Dimitre made a good point in his post. I would just add that in your
case including the trace backup of control file together with rman
controlfile autobackup backup could help.



On 9/8/06, Jared Still <jkstill@xxxxxxxxx> wrote:

  Source server:  64 bit RedHat ES 4
  Target server :  32 bit RedHat ES4

Oracle: - 64 bit on the 64 bit server - 32 bit on the 32 bit

What I am trying to do is restore an Oracle database from 64 bit server to
a 32 bit server.

The assumption is that the source database is 64 bit, it has died, and
took its storage with it.

The database has been backed up with RMAN, there is no RMAN repository,
and autobackup of controlfiles is turned on.

The only server available to do a restore is a 32 bit RH server.

The database files for 32 bit and 64 bit Oracle are the same.
The PL/SQL must be recompiled, but that has nothing to do with restoring
the database.

The control files are however, different - they must be recreated when
migrating from 32-bit -> 64 bit.
( see

This is making it somewhat difficult to restore the database.

The controlfile can easily be restored to the 64 bit server, but not the
32 bit server.
Following are the results of attempting to do so:

SQL> get restore_0905_ctlfile.sql
  1  -- This procedure will restore the control file as text
  2  declare
  3     devtype varchar2(256);
  4     done boolean;
  5  begin
  6     devtype := dbms_backup_restore.deviceallocate(type=>'sbt_tape');
  7     dbms_backup_restore.restoresetdatafile;

  9     dbms_backup_restore.restorebackuppiece('c-2182868868-20060905-01',
 10     dbms_backup_restore.devicedeallocate;
 11* end;
 12  /
-- This procedure will restore the control file as text
ERROR at line 1:
ORA-19624: operation failed, retry possible
ORA-19507: failed to retrieve sequential file,
handle="c-2182868868-20060905-01", parms=""
ORA-27029: skgfrtrv: sbtrestore returned error
ORA-19511: Error received from media manager layer, error text:
Backup file <c-2182868868-20060905-01> not found in NetBackup catalog
ORA-07202: sltln: invalid parameter to sltln.
ORA-06512: at "SYS.X$DBMS_BACKUP_RESTORE ", line 1371
ORA-06512: at line 9

The file does exist, as I restored it to a 64 bit server.

The problem is that the datafiles cannot be restored without the
A new controlfile cannot be created without the datafiles.

An interesting catch-22, no?

At this point, I am ready to try building a database with the identical
datafiles, and then attempt the restore over the new files.
( I know what the datafiles are due to job that runs periodically that
backs up the controfile
  to trace - I restored the file manually from backups via NetBackup)

Any thoughts on another way to do this restore?


Jared Still
Certifiable Oracle DBA and Part Time Perl Evangelist

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