#pairevtwait -g dg13 -t 300 -s pair

3.Create the Delta Resync pair dg23 between DC2 and DC3 from any node in DC2:

#paircreate –g dg23 –f async –nocsus –vl –c 15 –jp <Journal_id> -js <Journal_id>

For configuring Delta Resync pair between DC1 and DC3, the steps differ based on 3DC Sync/CAJ or 3DC CAJ/CAJ replication. For 3DC CAJ/CAJ replication, first create Continuous Access Journal pair between DC1 and DC2 and then between DC2 and DC3. Create a Delta Resync pair between DC1 and DC3 after creating the Continuous Access Journal pairs.

To create pairs with Delta Resync pair between DC1 and DC3, and when using 3DC CAJ/CAJ replication:

1.Create the Continuous Access Journal device group between DC1 and DC2.

a.Create the Continuous Access Journal pair dg12 from any node in DC1:

#paircreate –g dg12 –f async –vl –c 15 –jp <Journal_id> -js <Journal_id>

b.Wait for the PAIR state to come up for the dg12 Journal device group:

#pairevtwait -g dg12 -t 300 -s pair

2.Create the Continuous Access Journal device group between DC2 and DC3.

a.Create the Continuous Access Journal pair dg23 from any node in DC2.

#paircreate –g dg23 –f async –vl –c 15 –jp <Journal_id> -js <Journal_id>

b.Wait for the PAIR state to come up for the dg13 Journal device group.

#pairevtwait -g dg23 -t 300 -s pair

3.Create the Delta Resync pair dg13 between DC2 and DC3 from any node in DC1:

# paircreate –g dg13 –f async –nocsus –vl –c 15 –jp <Journal_id> -js <Journal_id>

NOTE: HP StorageWorks XP 3DC Sync/CAJ with Delta Resync replication does not allow the creation of Delta Resync pair when data is being replicated in Multi-Hop topology.

To create pairs with Delta Resync pair between DC1 and DC3, and when using 3DC Sync/CAJ replication:

1.Create the Continuous Access Synchronous device group between DC1 and DC2.

a.Create the Continuous Access Synchronous pair dg12 from any node in DC1:

#paircreate –g dg12 –f <data or never> –vl –c 15

b.Wait for the PAIR state to come up for the dg12 device group:

#pairevtwait -g dg12 -t 300 -s pair

2.Create the Continuous Access Journal device group between DC2 and DC3.

a.Create the Continuous Access Journal pair dg23 from any node in DC2:

#paircreate –g dg23 –f async –vl –c 15 –jp <Journal_id> -js <Journal_id>

b.d. Wait for the PAIR state to come up for the dg23 Journal device group:

#pairevtwait -g dg23 -t 300 -s pair

3.Before creating a Delta Resync pair between DC1 and DC3, issue horctakeover on DG12 pair at DC2 so that the data starts replicating in Multi-Target topology from DC2:

# horctakeover –g dg12

4.Create a Delta Resync pair between DC1 and DC3 from any node in DC1:

438 Designing a Three Data Center Disaster Recovery Solution