HP XP Continuous Access Software User Manual
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Contents
1 Overview of HP Copy Solutions....................................................................8
XP Continuous Access Journal....................................................................................................8
XP Business Copy and ShadowImage for Mainframe.....................................................................8
XP Continuous Access and TrueCopy for Mainframe......................................................................9
2 Overview of XP Continuous Access Journal..................................................10
Local arrays......................................................................................................................13
Main and remote control units (primary and secondary arrays)................................................13
Journal groups...................................................................................................................14
Data volume pairs..............................................................................................................14
Journal volumes.................................................................................................................15
Number of journal volumes............................................................................................15
Journal volume specifications..........................................................................................15
Journal volume restrictions..............................................................................................16
Journal volume areas.....................................................................................................17
Consistency groups............................................................................................................17
Remote copy connections....................................................................................................18
Initiator and RCU target ports..............................................................................................19
XP Continuous Access Journal and the XP Remote Web Console Software.................................19
Host failover software.........................................................................................................19
Initial copy operations........................................................................................................20
Update copy operations.....................................................................................................21
Read and write I/O operations during XP Continuous Access Journal operations........................21
Secondary data volume write option....................................................................................22
Difference management......................................................................................................22
Creating and storing journals at primary arrays.....................................................................22
Copying journals to secondary arrays...................................................................................23
Storing journals at secondary arrays.....................................................................................23
Selecting and restoring journals at secondary arrays..............................................................23
Journal types.....................................................................................................................25
Journal obtain in XP Continuous Access Synchronous secondary sites........................................26
Switching XP's Continuous Access master journal group..........................................................27
XP Continuous Access Journal split types (PSUS).....................................................................36
XP Continuous Access Journal suspend types.........................................................................37
XP Continuous Access Journal suspension conditions..............................................................38
3 XP Continuous Access Journal operations requirements and restrictions............40
System requirements................................................................................................................40
Requirements and restrictions for XP Continuous Access Journal.....................................................41
Contents
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