HP StorageWorks Continuous Access XP user guide for the XP10000/XP12000 (December 2005)

36 Continuous Access XP for the XP10000/XP12000
43 km (26.7 miles) using standard ESCON support. Long-distance solutions are provided using approved
channel extenders and communication lines.
Figure 9 Serial remote copy connections
You can install dedicated ESCON channels or use existing ESCON channels connected by ESCDs. Logical
paths between the MCU and RCU must be separate from logical paths between the host and RCU. All
remote copy activities between two XP disk arrays can share the same remote copy connections.
ESCDs can accommodate multiple MCU-RCU remote copy connections (Figure 10).
Figure 10 N pairs of remote copy connections
You can configure n-to-1 or 1-to-n remote copy connections (n≤4) using the dynamic switching capability of
ESCDs to share physical interface cables between components (Figure 11).
Figure 11 N-to-1 and 1-to-n remote copy connections (n ≤4)