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Anleitung Zusammenfassung
Workflow..........................................................................................................................24
Configuring the quorum disks...................................................................................................24
Prerequisites......................................................................................................................24
Procedure.........................................................................................................................24
Adding the ID for the quorum disk to the storage systems.............................................................25
Prerequisites......................................................................................................................25
Procedure.........................................................................................................................25
Configuring host mode options.................................................................................................26
Prerequisites......................................................................................................................26
Procedure.........................................................................................................................26
4 Working with volume pairs........................................................................27
Workflow for ESAM volume pairs.............................................................................................27
Reasons for checking pair status...............................................................................................27
When to check pair status?......................................................................................................27
How pair status reflects system events and use............................................................................27
What pairs information can you view and where is it?.................................................................28
Where to find the information..............................................................................................29
How hosts see volume pairs.....................................................................................................29
Checking pair status ..............................................................................................................29
Pair status values....................................................................................................................30
Split types (PSUS status)......................................................................................................32
Suspend types (PSUE status)................................................................................................32
Volume pair creation ..............................................................................................................33
Creating an ESAM pair .....................................................................................................33
Prerequisites.................................................................................................................33
Procedure....................................................................................................................33
To verify host recognition of the ESAM P-VOL and S-VOL..............................................................35
How multipath software shows storage serial number for pairs......................................................36
Splitting pairs ........................................................................................................................36
Prerequisites......................................................................................................................36
Procedure.........................................................................................................................36
Resynchronizing pairs.............................................................................................................37
Reverse resynchronization....................................................................................................38
Prerequisites.................................................................................................................38
Procedure....................................................................................................................38
Releasing a pair.....................................................................................................................38
Changing Continuous Access Synchronous pairs to ESAM pairs ...................................................39
Requirements.....................................................................................................................40
Procedure.........................................................................................................................40
Comparison of the RAID Manager commands and Remote Web Console......................................41
5 System maintenance.................................................................................43
Applications used to perform maintenance tasks.........................................................................43
Required Remote Web Console settings................................................................................43
Related documentation............................................................................................................43
The different types of maintenance tasks....................................................................................43
Switching paths using multipath software .............................................................................43
Discontinuing ESAM operations ..........................................................................................43
Quorum disk ID deletion ....................................................................................................44
Deleting quorum disk IDs (standard method).....................................................................44
Deleting quorum disk IDs by system attribute (forced deletion).............................................45
Recovery of accidently deleted quorum disks.........................................................................45
Recovering the disk when the P-VOL was receiving host I/O at deletion................................45
Recovering the disk when the S-VOL was receiving host I/O at deletion................................46
Planned outages for system components................................................................................46
4
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