HP A.06.11 - Manual (Page 64)

Figure 14 Selecting backup objects
Click Next.
7. Select the device(s) you want to use for the backup. Click Properties to set the
device concurrency, media pool, and preallocation policy. For more information
on these options, click Help.
You can also specify whether you want to create additional copies (mirrors) of
the backup during the backup session. Specify the desired number of mirrors
by clicking the Add mirror and Remove mirror buttons. Select separate devices
for the backup and for each mirror.
For detailed information on the object mirror functionality, see the online Help
index: “object mirroring”.
Click Next to proceed.
Integrating Oracle and Data Protector 64