HP XP Racks - Manual (Page 261)

4. From the remote host, register a command device for each of the storage systems at the remote,
intermediate, and primary sites.
Creating a Copy Group
Using the copy groups in the following figure as an example, the following describes how to define
a copy group, create a copy pair, and register the copy group in the EXCTG of the storage system.
Figure 97 Copy group Example when Cnt Ac-J Z Copy Groups are Added for Expansion to a 4x4x4
Cascade Configuration
Perform the following procedure from the primary host.
1.
From the ISPF panel, define the following copy groups.
•
Define a Continuous Access Journal Z EXCTG (UREX) between the intermediate site and
the remote site.
•
Divide the above EXCTG into copy groups (defined as URG1 and URG2), each of which
is assigned to a storage system.
Defining a 4x4x4 Cascade Configuration 261