HP StorageWorks XP Remote Web Console Software - Manual (Page 53)

Chapter 2 About Universal Replicator Operations 2-31
Hitachi Universal Replicator for IBM /OS User’s Guide
secondary
subsystem
secondary
dataVOL
restore
JNL VOL
journal restore
primary subsystem
(former secondary subsystem)
primary data VOL
(former R-VOL)
master
JNL VOL
primary
subsystem
journal copy
URz pair for delta resync operation
Data flow
Journal data flow
Failure
Write
TCz Synchronous, UR primary site A URz secondary site
TCz Synchronous
primary site B
(former secondary site)
master
JNL VOL
journal obtain
M-VOL
primary data VOL
primary host secondary host
primary host
(former
secondary host)
Figure 2-8 Delta Resync Setting in 3DC Multi-target Configuration
(After Failure Occurred)