8 Maintaining the system ............................................................................82
Pair maintenance—change the pair-split option .........................................................................82
Journal and mirror maintenance...............................................................................................82
Change Continuous Access Journal options used by journals ..................................................83
Change Continuous Access Journal options used by mirrors ....................................................85
Delete journal volumes from a journal ..................................................................................87
Delete a journal ................................................................................................................88
Logical path maintenance........................................................................................................88
Modify data-transfer time threshold .....................................................................................89
Delete logical paths ..........................................................................................................89
Delete the logical path between primary and secondary storage system ...................................90
Manage power-off for systems and network devices ...................................................................90
When power stops unexpectedly.........................................................................................91
When power is removed from primary or secondary system................................................91
When power is removed from network relay devices .........................................................91
Power off storage systems intentionally..................................................................................91
Power off the primary or secondary system.......................................................................91
Power off the primary and secondary systems at the same time...........................................92
Power off network relay devices...........................................................................................92
9 Disaster recovery operations .....................................................................93
Preparing for disaster recovery ................................................................................................93
File and database recovery procedures ....................................................................................93
Switch operations to the secondary site ....................................................................................93
Copy data back to the primary site ..........................................................................................94
Resume normal operations at the primary site ............................................................................94
Disaster recovery when the system consists of multiple primary and secondary storage systems.........95
Recovering the primary site from a failure when the system consists of multiple primary and
secondary storage systems..................................................................................................95
Transferring business tasks to primary site after recovering from primary site failures...................95
Recovery procedures with shared volumes..................................................................................96
Recovery in a 3DC cascade configuration ............................................................................97
Recovering from primary site disaster in 3DC multitarget configuration......................................97
Recovering from primary site failures (when delta resync operation is performed)........................99
Recovering from failures in the primary site and the Continuous Access Synchronous secondary
site................................................................................................................................101
Recovery in a 2DC configuration ......................................................................................102
Resume operations in the primary site ...........................................................................102
Recovery with Business Copy configuration .........................................................................103
10 Troubleshooting....................................................................................104
General troubleshooting........................................................................................................104
Troubleshooting logical paths ................................................................................................105
Troubleshooting suspended pairs ...........................................................................................107
Troubleshooting using Remote Web Console............................................................................109
Error codes .........................................................................................................................109
Troubleshooting using RAID Manager ....................................................................................109
Service information messages (SIMs) ......................................................................................123
Miscellaneous troubleshooting................................................................................................125
Suspension among journals ..............................................................................................125
Contents 5
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