Failback - HP XP P9500 Software User's Manual

4. On the primary host, execute the YKRESYNC DELTAJNL command for Cnt Ac-J Z copy pairs
that are in the HOLD status and that are between the local storage system and the remote
storage system.
YKQUERY
YKRESYNC DELTAJNL
YKEWAIT GOTO(DUPLEX)
5. Start a failure recovery of the primary storage systems.
2DC configuration operations are performed from the local storage system.

Failback

1. Recover the primary storage system failure.
2. Use TPC-R on the primary host to dissolve the Cnt Ac-S copy pairs with the HyperSwap attribute.
3. Use TPC-R on the primary host to reconfigure the paths required for Cnt Ac-S copy pairs with
the HyperSwap attribute.
364 Maintenance and Troubleshooting Operations