HP XP Racks - Manual (Page 10)

Operating an Open/MF consistency group ........................................................................339
Resynchronizing an Open/MF consistency group.................................................................340
8 Maintenance and troubleshooting operations.............................................341
Using a 2DC Configuration...................................................................................................341
Failover Procedure...........................................................................................................341
Failback Procedure..........................................................................................................343
Notes on Failovers and Failbacks in a 2DC Configuration.....................................................344
Notes on operating copy pairs.....................................................................................345
Notes on dissolving copy pairs.....................................................................................345
Using a 3DC Cascade (Cnt Ac-S Z x Cnt Ac-J Z) Configuration...................................................346
Failover Procedure...........................................................................................................346
Failback Procedure..........................................................................................................347
Using a 3DC Cascade (Cnt Ac-J Z x Cnt Ac-J Z) configuration ...................................................350
Performing primary site storage system maintenance.............................................................352
Failover.....................................................................................................................352
Failback.....................................................................................................................353
Performing intermediate site storage system maintenance......................................................354
Preparing...................................................................................................................355
Recovering.................................................................................................................356
Performing remote site storage system maintenance..............................................................357
Preparing...................................................................................................................357
Recovering.................................................................................................................358
Performing primary site host maintenance...........................................................................358
Failover.....................................................................................................................358
Failback.....................................................................................................................359
Operating procedure during a primary site storage system failure (with information lost from
memory).........................................................................................................................361
Failover.....................................................................................................................361
Failback.....................................................................................................................361
Operating procedure during a primary site storage system failure (with no information lost from
memory).........................................................................................................................361
Failover.....................................................................................................................361
Failback.....................................................................................................................361
Operating procedure during an intermediate site storage system failure (with information lost from
memory).........................................................................................................................362
Preparing...................................................................................................................362
Recovering.................................................................................................................363
Operating procedure during an intermediate site storage system failure (with no information lost
from memory)..................................................................................................................364
Preparing...................................................................................................................364
Recovering.................................................................................................................365
Operating procedure during a remote site storage system failure (with information lost from
memory).........................................................................................................................367
Preparing...................................................................................................................367
Recovering.................................................................................................................367
Operating procedure during a remote site storage system failure (with no information lost from
memory).........................................................................................................................368
Preparing...................................................................................................................368
Recovering.................................................................................................................369
Operating procedure during a primary site host failure.........................................................369
Failover.....................................................................................................................369
Failback.....................................................................................................................370
Operating procedure during a path failure between the storage systems at the primary site and
the intermediate site.........................................................................................................371
10 Contents