HP A.06.11 - Manual (Page 74)

1. Add the following command to the RMAN script before any allocate channel
command:
set duplex=<on | 2 | ... >
IMPORTANT:
If more than one allocated channel is used, it may happen that some original
and copied objects are backed up to the same medium. To prevent this,
you should use only one allocated channel when backing up using the
duplex mode.
2. Add the following parameter to every format string used for backup:
%c
3. Set the concurrency of each device used for backup to 1.
4. Set the MIN and MAX load balancing parameters according to the following
formula:
(number of duplex copies)*(number of allocated channels)
Example
If the duplex is set to 2 and the backup runs with 1 allocated channel, then the
MIN
and MAX parameters should be set to 2.
IMPORTANT:
If the MIN and MAX load balancing parameters are set to lower values, the backup will
hang.
If the MIN and MAX load balancing parameters are set to higher values, it may happen
that the original and copied objects are backed up to the same medium.
Testing the integration
Once you have created and saved a backup specification, you should test it before
running a backup. The test verifies both parts of the integration, the Oracle side and
the Data Protector side. In addition, the configuration is tested as well.
Integrating Oracle and Data Protector 74