P9500 Storage Systems; Main And Remote Control Units - HP XP P9500 User Manual

A Continuous Access Journal 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).
Management software consists of:
Remote Web Console graphical user interface (GUI)
RAID Manager
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 components are illustrated in the following figure and described in
greater detail in the following sections.
Figure 2 Continuous Access Journal components

P9500 storage systems

Continuous Access Journal 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.

Main and remote control units

The primary and secondary systems are often referred to as the MCU (primary system) and RCU
(secondary system). MCU is the main control unit, RCU is the remote control unit.
10 Continuous Access Journal overview