HP XP P9500 Storage - Manual (Page 249)

5. Execute the YKMAKE command for the Continuous Access Journal Z EXCTG (UREX).
6. Execute the YKEWAIT GOTO(DUPLEX) command to continue monitoring until the status has
changed DUPLEX.
A copy pair is created, and the journal group is registered in the EXCTG of the storage system.
Expanding to a 4x4x4 Cascade Configuration by Adding a Continuous Access Journal Z Copy
Group to a Continuous Access Synchronous Z Copy Group
The following describes the procedure for expanding the configuration to a 4x4x4 Cascade
configuration by adding Continuous Access Journal Z copy groups to Continuous Access
Synchronous Z copy groups.
The following figure shows a configuration example.
Defining a 4x4x4 Cascade Configuration 249