HP XP P9500 Storage - Manual (Page 553)

7. Start primary site host maintenance.
Operation in a 4x4x4 Delta Resync configuration that originates from the local site starts.
Failback
1. Terminate primary site host maintenance.
2. Stop operation at the local site.
3. From the primary site, execute the YKSUSPND FLUSH command for the local-to-remote EXCTG.
•
YKQUERY
•
YKSUSPND FLUSH
•
YKEWAIT GOTO(SUSPEND)
Using a 4x4x4 Delta Resync configuration 553