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3-14 Chapter 3 Preparing for Universal Replicator z/OS Operations
Hitachi Universal Replicator for IBM /OS User’s Guide
Setting up Remote Copy Connections
Figure 3-1 shows the remote copy connection configurations for URz
operations. The primary storage system and secondary storage system of each
URz pair must be connected via 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 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. URz operations
can be performed at distances of up to 30 km (18.6 miles) using standard
single-mode long wave support. For further distance, the channel extender
connections are required. URz operations can be performed at distances of up
to 30 km (18.6 miles) using standard single-mode long wave support. For
distances greater than 43 km (26.7 miles), approved channel extender
products and telecommunications lines are required.
MCU/RCU
MCU/RCU
MCU/RCU
MCU/RCU
RCU/MCU
RCU/MCU
RCU/MCU
RCU/MCU
RCU/MCU
MCU/RCU
MCU/RCU
Unrestricted distance
Shortwave: 1.5 km
Longwave: 10 km
Longwave:30 km
Shortwave: 0.5 km
Switch
A
TM telecommunications line
O
p
tical fiber cables
Max. 2 switches connection
Max. 2 switches connection
Channel extender
Multimode shortwave optical fiber cables up to 0.5 km
Multimode longwave optical fiber cables up to 10 km
Figure 3-1 URz Remote Copy Connection Configuration
The remote copy connection between primary storage system and secondary
storage system provides three different configurations:
– Direct connection (see Figure 3-2),
– Switch connection (see Figure 3-3),
– Extender connection (see Figure 3-4).