HP XP P9500 Storage - Manual (Page 10)

Operating an Open/MF consistency group ........................................................................338
Resynchronizing an Open/MF consistency group.................................................................339
8 Maintenance and troubleshooting operations.............................................340
Using a 2DC Configuration...................................................................................................340
Failover Procedure...........................................................................................................340
Failback Procedure..........................................................................................................342
Notes on Failovers and Failbacks in a 2DC Configuration.....................................................343
Notes on operating copy pairs.....................................................................................344
Notes on dissolving copy pairs.....................................................................................344
Using a 3DC Cascade (Cnt Ac-S Z x Cnt Ac-J Z) Configuration...................................................345
Failover Procedure...........................................................................................................345
Failback Procedure..........................................................................................................346
Using a 3DC Cascade (Cnt Ac-J Z x Cnt Ac-J Z) configuration ...................................................349
Performing primary site storage system maintenance.............................................................352
Failover.....................................................................................................................352
Failback.....................................................................................................................353
Performing intermediate site storage system maintenance......................................................355
Preparing...................................................................................................................355
Recovering.................................................................................................................356
Performing remote site storage system maintenance..............................................................358
Preparing...................................................................................................................358
Recovering.................................................................................................................359
Performing primary site host maintenance...........................................................................359
Failover.....................................................................................................................359
Failback.....................................................................................................................360
Operating procedure during a primary site storage system failure (with information lost from
memory).........................................................................................................................362
Failover.....................................................................................................................362
Failback.....................................................................................................................362
Operating procedure during a primary site storage system failure (with no information lost from
memory).........................................................................................................................362
Failover.....................................................................................................................362
Failback.....................................................................................................................362
Operating procedure during an intermediate site storage system failure (with information lost from
memory).........................................................................................................................363
Preparing...................................................................................................................363
Recovering.................................................................................................................364
Operating procedure during an intermediate site storage system failure (with no information lost
from memory)..................................................................................................................365
Preparing...................................................................................................................365
Recovering.................................................................................................................366
Operating procedure during a remote site storage system failure (with information lost from
memory).........................................................................................................................368
Preparing...................................................................................................................368
Recovering.................................................................................................................368
Operating procedure during a remote site storage system failure (with no information lost from
memory).........................................................................................................................369
Preparing...................................................................................................................369
Recovering.................................................................................................................370
Operating procedure during a primary site host failure.........................................................370
Failover.....................................................................................................................370
Failback.....................................................................................................................371
Operating procedure during a path failure between the storage systems at the primary site and
the intermediate site.........................................................................................................372
10 Contents