Hitachi TrueCopy for IBM z/OS User and Reference Guide (T5211-96001, June 2007)

Preparing for TrueCopy for z/OS Operations 3-15
Hitachi Universal Storage Platform V TrueCopy for IBM z/OS User’s Guide
8. Hitachi Representative: If the user plans to use the Local TCzA timer type
option, set the SVP clock to local time so that the TCzA time-stamps will be
correct.
9. Hitachi Representative: Install the TCz remote copy connections between
the MCU(s) and RCU(s). This hardware (optical fibre cables, switches, etc.) is
supplied by the user. Distribute the paths between different storage clusters
and ESCDs or switches to provide maximum flexibility and availability. The
logical paths between the MCU and RCU must be separate from the logical
paths between the host and RCU. For fibre-channel interface connections, all
remote copy activities between two USP Vs (i.e., TCz, TCzA, TrueCopy Sync,
and TrueCopy Async) can share the same remote copy connections.
Remote Copy Connections
Figure 3-1 shows the remote copy connection configurations for fibre-channel
interface TCz operations. The MCU and RCU of each TCz pair must be
connected via multimode shortwave or single-mode longwave optical fibre
cables. If you use 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. If you use single-mode longwave optical fibre cables, fibre cables
up to 30 km in length and up to two switches are required for distances
greater than 10 km. TCz operations can be performed at distances of up to 30
km (18.6 miles) using standard single-mode longwave support. Long-distance
solutions are provided using approved channel extenders and communication
lines.
Shortwave: 0.5 km
Longwave: 10 km
Switch
Multimode shortwave optical fibre cables
up to 0.5 km
Single-mode longwave optical fibre cables
up to 10 km
Unrestricted distance
Channel Extender
A
TM telecommunications lines
MCU/RCU
RCU/MCU
MCU/RCU
RCU/MCU
MCU/RCU
RCU/MCU
MCU/RCU RCU/MCU
MCU/RCU
RCU/MCU
Shortwave: 1.5 km
Longwave: 30 km (Max)
Figure 3-1 Fibre-Channel Remote Copy Connection Configurations
Note: For fibre-channel interface connections, you can use the switches as for
ordinary switch connections, and no special settings are required for the
USP Vs.