P9500 Storage Systems - HP XP P9500 User Manual

A Continuous Access Journal Z system consists of the following:
P-VOLs and S-VOLs on the local and remote P9500
Master and restore journal volumes on the local and remote P9500
Master and restore journals on the local and remote P9500
◦ The master journal consists of the primary volume(s) and master journal volume(s).
◦ The restore journal consists of the secondary volume(s) and restore journal volume(s).
When Continuous Access Journal Z journals consist of journal volumes located in multiple systems,
a host I/O time stamping function is required. This is provided by MVS DFSMSdfp.
An error reporting communications (ERC) feature is also required when Continuous Access Journal
Z is to be used for disaster recovery.
Management software consists of:
Remote Web Console graphical user interface (GUI)
Business Continuity Manager
Configuration File Loader
NOTE:
Continuous Access Journal Z processing continues uninterrupted if the SVP reboots or even if
the SVP fails.
Continuous Access Journal Z does not support operations in which one P-VOL is copied to
more than one S-VOL, or more than one P-VOL is copied to one S-VOL.
Continuous Access Journal Z components are illustrated in the following figure and described in
greater detail in the following sections.
Figure 2 Continuous Access Journal Z components

P9500 storage systems

Continuous Access Journal Z is operated using two P9500 storage systems, one at the primary
and one at secondary sites. The primary system consists of the main control unit (MCU) and the
SVP . The secondary system consists of the remote control unit (RCU) and the SVP.
The primary system communicates with the secondary system over dedicated fibre channel
remote copy connections.
The P9500 system can function simultaneously as a primary and secondary system.
10 Continuous Access Journal Z overview