HP XP P9500 Storage - Manual (Page 330)

7. From the primary host, make sure that the Cnt Ac-S Z copy group status is SWAPPING, and
then execute the YKRESYNC FORWARD command for the Cnt Ac-S Z copy group.
8. Transfer the application information to the primary site.
Using a 3DC Cascade (Cnt Ac-J Z x Cnt Ac-J Z) configuration
The following table explains how to perform maintenance for a 3DC Cascade (Cnt Ac-J Z x Cnt
Ac-J Z) configuration and how to take action if a failure occurs.
Table 100 Using a 3DC Cascade (Cnt Ac-J Z x Cnt Ac-J Z) configuration
See: Description Target Maintenance
or
failure No.
“Performing
primary Suspend the Continuous Access Journal Z copy pair between the primary site
and the intermediate site, and then change the configuration to a 2DC
configuration (Intermediate
→ Remote).
Primary site storage
system maintenance Maintenance 1
site storage
system
330 Maintenance and troubleshooting operations