HP XP Continuous Access Software - Manual (Page 34)

34 Continuous Access XP for the XP1024/XP128
” Fibre Channel remote copy connections ” on page 34 for remote copy configurations. Distribute
paths between different storage clusters and switches to provide maximum flexibility and availability.
Logical paths between the MCU and RCU must be separate from logical paths between the host and
RCU. For Fibre Channel and serial interface connections, only Continuous Access XP activities (Sync
and Async) can share the same direct connect or switch zoned fibre remote copy connections (future
support will eliminate this restriction).
Fibre Channel remote copy connections
Figure 5 shows remote copy connection configurations for Fibre Channel interface Continuous Access XP
operations. The MCU and RCU of each Continuous Access XP pair must be connected via multimode
shortwave optical fibre cables. For multimode shortwave optical fibre cables, fibre cables up to 1.5 km in
length and up to two switches are required for distances greater than 0.5 km. For single-mode longwave
optical fibre cables between two switches, fibre cables up to 11 km in length can be used
(.5km+10km+.5km). Using DWDM between two FC switches can allow a distance of 80km or more.
Long-distance solutions are provided using approved channel extenders and communication lines.
Figure 5 Fibre Channel remote copy connections
NOTE: For Fibre Channel interface connections, use the switches as ordinary switch connections. No
special settings are required for the XP1024/XP128.
Fibre Channel interface connection provides the following configurations:
• Direct connection: Two devices are connected directly.
Figure 6 Direct connection