HP XP Racks - Manual (Page 165)

11. From the primary host, make sure that the status of the Continuous Access Synchronous Z and
Continuous Access Journal Z copy groups is SIMPLEX, and then execute the YKMAKE command
to create a copy pair for Continuous Access Synchronous Z copy groups.
12. From the primary host, make sure that the status of the Continuous Access Synchronous Z copy
groups has changed to DUPLEX, and then execute the YKMAKE command to make a copy
pair for Continuous Access Journal copy groups.
Defining a 3DC Cascade (Cnt Ac-S Z x Cnt Ac-J Z) configuration 165