Data Guard: db_file_name_convert/log_file_name_convert when using ASM/OMF

All,
I have a call currently open with Oracle regarding the setting of the parameters db_file_name_convert and log_file_name_convert in a data guard environment. We use ASM / OMF for storage and file naming and my question is basically do these parameters have to be set. The documentation says they do where the file structure is different between PRIMARY and STANDBY.
I have successfully tested failover and switchover without these parameters. I have also added a new tablespace on the PRIMARY and watched it create a new OMF datafile on standby when the logs are switched.
I just can't see a reason for setting them when using ASM / OMF.
I'm hoping someone can enlighten me here because I'm getting nowhere whith support. The following is our Data Guard setup:
PRIMARY
DB_NAME=IBSLIVE
DB_UNIQUE_NAME=IBSLIVE
ASM Disk Groups:
+PRODDATA (Data Files, Control Files, Redo Logs)
+PRODFLASH (Archive Logs, Flashback Logs, RMAN backups)
+PRODLOGS (Multiplexed Control & Redo Logs)
STANDBY
DB_NAME=IBSLIVE
DB_UNIQUE_NAME=IBSDR
ASM Disk Groups:
+DRDATA (Data Files, Control Files, Redo Logs)
+DRFLASH (Archive Logs, Flashback Logs, RMAN backups)
+DRREDO (Multiplexed Control & Redo Logs)
Many Thanks,
Ian.

Ian,
I'm having similar thoughts.
I have created a new instance with files in asm under +datadisk/obosact (this is the smae name as primary)
I then modify the db_unique_name from obosact to obosactdr as is required for standby to work
When I recover (duplicate target database for standby; ) I find that the files are in datadisk/obosactdr not in the datadisk/obosact area
I found this reference http://www.oracle.com/technology/deploy/availability/pdf/MAA_WP_10g_RACPrimaryRACPhysicalStandby.pdf
4. Connect to the ASM instance on one standby host, and create a directory within the DATA disk group that has the same name as the DB_UNIQUE_NAME of the standby database. For example: SQL> ALTER DISKGROUP data ADD DIRECTORY '+DATA/BOSTON';
This step seems to indicate that the location of the files is determined by the db_unique_name not the db_file_name_convert paramenter
DId you ever resolve the issue?

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Best Regards,
Mahi

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<?C_LOC_VALUE?>
<?end for-each?>Using the above code
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00.A.01.B..
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<?C_LOC_VALUE?>
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00.A.01.B..
00.A.01.B..
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<?for-each:G_HEADER?>
<?sort: translate(C_LOC_VALUE,'0123456789','abcdefghij');'ascending';data-type=’text’?>
<?C_LOC_VALUE?>
<?end for-each?>you will see th correct result.
00.A.01.B..
00.A.01.B..
ABB.001....
DDD.001....

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994269 wrote:
Hello all,
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Wel come to the data guard>
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With regards

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