HP StorageWorks XP Remote Web Console Software - Manual (Page 47)

Continuous Access XP Journal user guide 47
6. HP Representative: Install Continuous Access XP Journal remote copy connections between the primary
and secondary disk arrays. The user supplies this hardware (optical fibre cables, switches, and so on).
See ”
Remote copy connections ” on page 47 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 and secondary disk arrays must be separate from the logical paths
between the host and secondary disk array.
Remote copy connections
Figure 7 shows remote copy connection configurations for Continuous Access XP Journal operations. The
primary and secondary disk arrays of each Continuous Access XP Journal pair must be connected using
optical fiber cables. If you use multimode shortwave 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
longwave optical fiber cables, fibre cables up to 30 km in length and up to two switches are required for
distances greater than 10 km. Continuous Access XP Journal operations can be performed at distances of
up to 30 km (18.6 miles) using standard single-mode longwave support. For greater distances, channel
extender connections are required. Continuous Access XP Journal operations can be performed at
distances of up to 30 km (18.6 miles) using standard single-mode longwave support. For distances greater
than 43 km (26.7 miles), approved channel extender products and telecommunications lines are required.
Figure 7 Continuous Access XP Journal remote copy connection configuration
The remote copy connection between primary disk array and secondary disk array provides three different
configurations: