HP Surestore E Disk Array XP256 HP XP P9000 External Storage Access Manager Us - Page 4

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 Verifying host recognition of a new pair 35 Verification...35 How multipath software shows storage serial number for pairs 36 Splitting pairs ...36 Prerequisites...36 Procedure...37 Resynchronizing pairs...37 Reverse resynchronization...38 Prerequisites...38 Procedure...38 Releasing a pair...39 Changing Continuous Access Synchronous pairs to ESAM pairs 40 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 4 Contents