HP XP P9500 Storage - Manual (Page 339)

2. Start remote site storage system maintenance.
Operation in a 2DC configuration starts between the primary site and the intermediate site.
Recovering
1. Terminate remote site storage system maintenance.
2. From the primary site, execute the YKRESYNC command for the Continuous Access Journal Z
copy pair between the intermediate site and the remote site.
•
YKQUERY
•
YKRESYNC
•
YKEWAIT GOTO(DUPLEX)
Operation returns to normal.
Performing primary site host maintenance
The following are the procedures for primary site host maintenance.
Failover
1. Stop operation at the primary site.
Using a 3DC Cascade (Cnt Ac-J Z x Cnt Ac-J Z) configuration 339