HP XP7 Storage - Manual (Page 11)

An error reporting communications (ERC) feature is also required when Continuous Access Journal
Z is to be used for disaster recovery.
Continuous Access Journal Z processing continues uninterrupted if the SVP reboots, and even if
the SVP fails.
Management software consists of:
•
Remote Web Console graphical user interface (GUI)
•
Business Continuity Manager
•
Configuration File Loader
Continuous Access Journal Z components are illustrated in the following figure and described in
greater detail in the following topics.
Figure 2 Continuous Access Journal Z components
XP7 storage systems
Continuous Access Journal Z can be operated using two XP7 systems, one at the local site and
one at the remote site. The primary system consists of the main control unit and the . The secondary
system consists of the remote control unit and the SVP.
•
Each XP7 system can function simultaneously as a primary and secondary system.
•
The primary system communicates with the secondary system over dedicated fibre-channel
remote copy connections.
•
The primary system controls the primary storage volume (P-VOL) and the following operations:
Host I/O write to the P-VOL ◦
◦ P-VOL data copy to the master journal
◦ Initial copy and update copy between the P-VOL and secondary volume (S-VOL).
•
The secondary system controls the secondary storage volume (S-VOL) and the following
operations:
◦ Journal commands to the primary system.
◦ Journal data copy from the master to the restore journal
Hardware and software components 11