Advice on simulating dataguard on standard Edition

Hello,
I'm currently working on 10g R2/Windows based OS.
The following are actions done to simulate data guard using standard Edition on oracle 10g R2.
All steps works fine on both side as you can see below.
{color:#ff0000}_Actions done on the primary database_{color}
{color:#0000ff}- startup the database in mounted state
{color}SQL> startup mount;
SQL> alter database archivelog;
{color:#0000ff}- Enable the force logging of the database{color}
SQL> alter database force logging;
{color:#0000ff}- Create the backup controlfile
{color}SQL> alter database backup controlfile to trace;
§ Make a cold backup of the primary database
{color:#0000ff}- Shutdown the database{color}
SQL> shutdown immediate;
Copy all datafiles, controlfiles,redolog files,password files ,spfile,tnsnames.ora,sqlnet.ora and listener.ora to be used for the secondary database
Directory
{color:#0000ff}§ Verify the checkpoint change# of the primary database at mounted state{color}
SQL> startup mount
SQL> select file#,checkpoint_change# from v$datafile_header;
FILE# CHECKPOINT_CHANGE#
1 541985
2 541985
3 541985
4 541985
{color:#ff0000}*Preparing the secondary database</strong{color}
{color:#0000ff}§ Restored all previous files copied during the above cold backup on each correponding location{color}
{color:#0000ff}§Create the database services ( I'm working on windows based OS{color})
DOS PROMPT # ORADIM -new -SID <SID>
{color:#0000ff}§ Create a backup controlfile from the sql statement contained from the former trace file
{color}
DOS PROMPT # set ORACLE_SID=<SID>
DOS PROMPT # sqlplus /nolog
SQL> conn /as sysdba
SQL> STARTUP NOMOUNT
CREATE CONTROLFILE REUSE DATABASE "<SID>" RESETLOGS FORCE LOGGING ARCHIVELOG
MAXLOGFILES 16
MAXLOGMEMBERS 3
MAXDATAFILES 100
MAXINSTANCES 8
MAXLOGHISTORY 292
LOGFILE
GROUP 1 'C:\ORACLE\PRODUCT\10.2.0\ORADATA\<SID>\REDO01.LOG' SIZE 50M,
GROUP 2 'C:\ORACLE\PRODUCT\10.2.0\ORADATA\<SID>\REDO02.LOG' SIZE 50M,
GROUP 3 'C:\ORACLE\PRODUCT\10.2.0\ORADATA\<SID>\REDO03.LOG' SIZE 50M
-- STANDBY LOGFILE
DATAFILE
'C:\ORACLE\PRODUCT\10.2.0\ORADATA\<SID>\SYSTEM01.DBF',
'C:\ORACLE\PRODUCT\10.2.0\ORADATA\<SID>\UNDOTBS01.DBF',
'C:\ORACLE\PRODUCT\10.2.0\ORADATA\<SID>\SYSAUX01.DBF',
'C:\ORACLE\PRODUCT\10.2.0\ORADATA\<SID>\USERS01.DBF'
CHARACTER SET WE8MSWIN1252
{color:#0000ff}§ Verify the secondary database mount state
{color}
SQL> select open_mode from v$database;
Output
OPEN_MODE
MOUNTED
{color:#0000ff}§ Verify that the checkpoint change# of the secondary database must match with the one on the primary database at mount state
{color}
SQL> select file#,checkpoint_change# from v$datafile_header;
FILE# CHECKPOINT_CHANGE#
1 541985
2 541985
3 541985
4 541985
{color:#0000ff}Set the automatic recovery mode on the secondary database
{color}
SQL> set autorecovery on
{color:#0000ff}Manually copy archived files generated on the primary database to be applied on the secondary database
{color}{color:#0000ff}launch the recover command to apply the changes on the secondary database{color}
SQL> RECOVER DATABASE UNTIL CANCEL USING BACKUP CONTROLFILE;
{color:#0000ff}Output generated during the recovering
{color}
SQL> recover database until cancel using backup controlfile;
ORA-00279: change 556095 generated at 11/17/2008 16:09:10 needed for thread 1
ORA-00289: suggestion :
C:\STANDBY_LOGDBA1\ARC_NUMBER_00012_001_0671026031_OF_761A57AC.ARC
ORA-00280: change 556095 for thread 1 is in sequence #12
ORA-00279: change 600989 generated at 11/18/2008 10:56:32 needed for thread 1
ORA-00289: suggestion :
C:\STANDBY_LOGDBA1\ARC_NUMBER_00013_001_0671026031_OF_761A57AC.ARC
ORA-00280: change 600989 for thread 1 is in sequence #13
ORA-00278: log file
'C:\STANDBY_LOGDBA1\ARC_NUMBER_00012_001_0671026031_OF_761A57AC.ARC' no longer
needed for this recovery
ORA-00279: change 601361 generated at 11/18/2008 11:02:24 needed for thread 1
ORA-00289: suggestion :
C:\STANDBY_LOGDBA1\ARC_NUMBER_00014_001_0671026031_OF_761A57AC.ARC
ORA-00280: change 601361 for thread 1 is in sequence #14
ORA-00278: log file
'C:\STANDBY_LOGDBA1\ARC_NUMBER_00013_001_0671026031_OF_761A57AC.ARC' no longer
needed for this recovery
ORA-00279: change 601687 generated at 11/18/2008 11:13:51 needed for thread 1
ORA-00289: suggestion :
C:\STANDBY_LOGDBA1\ARC_NUMBER_00015_001_0671026031_OF_761A57AC.ARC
ORA-00280: change 601687 for thread 1 is in sequence #15
ORA-00278: log file
'C:\STANDBY_LOGDBA1\ARC_NUMBER_00014_001_0671026031_OF_761A57AC.ARC' no longer
needed for this recovery
{color:#ff0000}*ORA-00308: cannot open archived log*
*'C:\STANDBY_LOGDBA1\ARC_NUMBER_00015_001_0671026031_OF_761A57AC.ARC'*
ORA-27041: unable to open file
OSD-04002: unable to open file
O/S-Error: (OS 2) The system cannot find the file specified.
{color}
Because I need to make all this work automatically, so I have to
1. Avoid copying manually archived files from primary database to secondary database
2. Avoid launching manually the recover command above
Question:
a) Does someone have any idea on how to avoid the message in red above? ( the message is normal but I just need to not want it to be displayed)
b) archived files copied can be corrupted therefore preveting the secondary database to recover, my current solution here is to multiplex archived files to avoid a single point of failure.
My question is to ask you guys if there is another way to prevent archived file to be corrupted before and after being copied?
c) Technically Logminer can be used to rollback transactions in case unwanted changes were committed, as I'm working on standard edition, there is another way to rollback a change not using Logminer?
d) I know that it's obvious using Enterprise Edition to fully configure data guard, but as cash flow is not enough, does some one give another disavantage on implementing this techninque(simalating data guard on standard edition)?
e) What else could you guys advise, base on your experience in this technique?
I trully need your help as I have never deal with this technique and I need much information to let know my boss in case he decided to go ahead with this.
Thanks in advance for your help

With standard Edition the following are what I have tried and it worked
SQL> {color:#0000ff}startup nomount
{color}ORACLE instance started.
Total System Global Area 612368384 bytes
Fixed Size 1250452 bytes
Variable Size 171969388 bytes
Database Buffers 436207616 bytes
Redo Buffers 2940928 bytes
SQL> {color:#0000ff}alter database mount standby database;
{color}
Database altered.
SQL> {color:#0000ff}recover standby database;{color}
ORA-00279: change 548433 generated at 11/18/2008 15:19:03 needed for thread 1
ORA-00289: suggestion :
C:\LOCAL_DESTINATION1_ORCL\ARC_NUMBER_00010_001_0671119159_OF_4775C2B4.ARC
ORA-00280: change 548433 for thread 1 is in sequence #10
ORA-00308: cannot open archived log
'C:\LOCAL_DESTINATION1_ORCL\ARC_NUMBER_00010_001_0671119159_OF_4775C2B4.ARC'
ORA-27041: unable to open file
OSD-04002: unable to open file
O/S-Error: (OS 2) The system cannot find the file specified.
{color:#ff0000}Now I tried to simulate fail over in order to open the standby in READ -WRITE mode
{color}
SQL> {color:#0000ff}alter database recover managed standby database finish force ;{color}
Database altered.
SQL> {color:#0000ff}alter database commit to switchover to primary;
{color}
Database altered.
SQL>{color:#0000ff} shutdown immediate;
{color}ORA-01109: database not open
Database dismounted.
ORACLE instance shut down.
SQL> {color:#0000ff}startup
{color}ORACLE instance started.
Total System Global Area 612368384 bytes
Fixed Size 1250452 bytes
Variable Size 171969388 bytes
Database Buffers 436207616 bytes
Redo Buffers 2940928 bytes
Database mounted.
Database opened.
SQL> {color:#0000ff}select open_mode from v$database;
{color}
OPEN_MODE
READ WRITE
What I'm seeing is that you have to automate by yourself the recovery mode through a scripts at OS level every time new archived file is shipped.
example:
a script a OS level a script may contain: recover standby database and could be triggered after X time?
Does some one have any tweak on how to send archive log on remote site without using data guard feature ?
Thanks in advance

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