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Checking pair status...............................................................................................................26
Creating pairs........................................................................................................................26
Performing the initial copy...................................................................................................26
Verifying that the host recognizes new pair............................................................................28
Splitting pairs.........................................................................................................................29
Resynchronizing pairs.............................................................................................................30
Reverse resynchronization....................................................................................................31
Releasing a pair.....................................................................................................................31
Changing Continuous Access Synchronous pairs to ESAM pairs....................................................32
Supported RAID Manager commands.......................................................................................33
What to do next.....................................................................................................................35
5 Monitoring and maintenance.....................................................................36
Monitoring pair status ............................................................................................................36
Pair status ........................................................................................................................36
Pair status descriptions .......................................................................................................37
Split types (PSUS status).................................................................................................38
Suspend types (PSUE status) ...........................................................................................39
Viewing quorum disks.............................................................................................................40
Maintenance tasks..................................................................................................................40
Switching paths using multipath software .............................................................................40
Discontinuing ESAM operations ..........................................................................................40
Replacing and formatting a quorum disk ..............................................................................41
Deleting a quorum disk ID ..................................................................................................42
Forcibly deleting a quorum disk ID.......................................................................................43
Recovering an accidently deleted quorum disk..................................................................43
Powering the system off and on............................................................................................44
Planned outage of quorum disk.......................................................................................44
Planned outage of primary system, quorum disk................................................................45
Planned outage of secondary system, quorum disk............................................................46
Planned outage of primary and secondary systems, quorum disk.........................................46
6 Disaster recovery operations......................................................................47
Recovery workflow..................................................................................................................47
Recovery from blocked P-VOL or S-VOL......................................................................................47
Recovering failed P-VOL in the primary system.......................................................................48
Recovering failed S-VOL in the primary system.......................................................................49
Recovering failed P-VOL in the secondary system....................................................................49
Recovering failed S-VOL in the secondary system...................................................................50
Recovery using resynchronization.........................................................................................50
Recovery using Business Copy S-VOL ...................................................................................51
Recovery using Continuous Access Journal P-VOL ..................................................................52
Recovery from quorum disk failure............................................................................................52
Recovery after power outage ...................................................................................................53
Recovering the primary system.............................................................................................53
Recovering the secondary system ........................................................................................54
Restoring owner and non-owner paths ......................................................................................55
Allowing host I/O to an out-of-date S-VOL.................................................................................55
7 Troubleshooting........................................................................................57
ESAM troubleshooting ............................................................................................................57
General troubleshooting.....................................................................................................57
Troubleshooting suspended ESAM pairs................................................................................58
Troubleshooting using RAID Manager ......................................................................................59
Recovery of a pinned track .....................................................................................................60
Recovering ESAM volumes..................................................................................................60
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