Contents
P9500 storage systems.......................................................................................................10
Pair volumes......................................................................................................................11
Journal volumes.................................................................................................................11
Journals............................................................................................................................11
Data path.........................................................................................................................12
Remote Web Console ........................................................................................................12
Initial copy operation.........................................................................................................13
Update copy operation ......................................................................................................14
S-VOL write option..................................................................................................................15
S-VOL read option..................................................................................................................15
Difference management...........................................................................................................15
Pair status..............................................................................................................................16
System requirements................................................................................................................17
Command device ..................................................................................................................21
Plan and design workflow .......................................................................................................22
Determining your RPO........................................................................................................23
Write-workload......................................................................................................................23
Measuring write-workload...................................................................................................23
Sizing journal volumes............................................................................................................24
Planning journals...............................................................................................................25
RAID group configuration....................................................................................................26
Planning journal volumes.........................................................................................................26
Host I/O time stamp..........................................................................................................27
Planning pair volumes.............................................................................................................27
Duplicating VOLSERs..........................................................................................................28
Contents
3