HP XP Continuous Access Software - Manual (Page 52)

Network Relay Devices” (page 155) for further information on powering off/on the primary
storage systems and secondary storage systems.
6. HP Service Representative: Install the XP Continuous Access Journal remote copy connections
between the primary storage system(s) and secondary storage system(s). This hardware (optical
fibre cables, switches, and so on) is supplied by the user.
See “Setting up Remote Copy Connections” (page 52) for remote copy configurations. Distribute
the paths between different storage clusters and switches to provide maximum flexibility and
availability. The logical paths between the primary storage system and secondary storage
system must be separate from the logical paths between the host and secondary storage
system.
Setting up Remote Copy Connections
Figure 9 (page 52) shows the remote copy connection configurations for XP Continuous Access
Journal operations. The primary storage system and secondary storage system for each XP
Continuous Access Journal pair must be connected via optical fiber cables.
•
If you use multimode short-wave optical fiber cables, fibre cables up to 1.5 km in length and
up to two switches are required for distances greater than 0.5 km.
•
If you use single-mode long-wave optical fiber cables, fibre cables up to 30 km in length and
up to two switches are required for distances greater than 10 km.
•
XP Continuous Access Journal operations can be performed at distances of up to 30 km (18.6
miles) using standard single-mode long-wave support.
◦ For further distance, channel extender connections are required.
◦ For distances greater than 43 km (26.7 miles), approved channel extender products and
telecommunications lines are required.
Figure 9 XP Continuous Access Journal Remote Copy Connection Configurations
52 Preparing for XP Continuous Access Journal Operations