HP StorageWorks 12000 - Virtual Library System EVA Gateway Manual page 171

3. Create an echo copy pool (including selecting whether to use tape initialization).
On the source device, select the destination library and "Create echo copy pools." In this context,
the echo copy pool acts as an asynchronous mirror between the selected source virtual library
and the target library. The barcodes created initially on the target device are now also "echoed"
in the source virtual library.
The slot range represents the slots on the replication target (not the source virtual library). Generally
you would create an echo copy pool across all the slots in that replication target (because there
is only ever one source device linked to a replication target). If you want to create multiple sets
of replicating cartridges, for example, with different replication priorities (see
Job Control), you can assign part of the slot range to one echo copy pool and another part to
another echo copy pool, etc.
The option to "Initialize via Tape Transport" is selected when creating the echo copy pool and
determines whether tape initialization will be used or not. If not selected, initialization will be
performed over the LAN/WAN.
The Deduplicated vs. Non-Deduplicated option is used when you may have a VLS shared between
two different backup applications of which one of them is not currently supported by Accelerated
deduplication. In this case, you must create a separate non-deduplicated echo copy pool for the
virtual cartridges that cannot be deduplicated and thus force non-deduplicated replication for
these cartridges (otherwise these cartridges will not be replicated). This will improve performance
because the replication system will not have to attempt to perform deduplication-enabled replication
on non-deduplicated cartridges.
4. Edit the replication policy (in echo copy pool).
By default the LAN/WAN replication policy (from the source perspective) is set to replicate 24
hours per day every day of the week, and set to continue running jobs at the end of each window.
If you want to restrict the replication jobs to only run during specific hours of the day on specific
days, you can edit the default replication policy by changing the Start Day, Start Time, Duration;
the "At End of the Policy Window" can be changed to cancel replication jobs if they have not
completed within the specified replication window (they would be restarted on the next window).
HP StorageWorks VLS and D2D Solutions Guide
Advanced Replication
171