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

Performing TrueCopy for z/OS Configuration Operations 5-5
Hitachi Universal Storage Platform V TrueCopy for IBM z/OS User’s Guide
Configuring the Host Interface Ports
TrueCopy for z/OS software allows you to change the configuration of the
USP V host interface ports as needed to accommodate the desired host and
TrueCopy for z/OS communications paths.
The USP V fibre-channel interface ports can be configured as target ports
(default), initiator ports, or RCU target ports.
• Target: The fibre-channel ports which will be connected to the host must be
configured as target ports (default). Target mode is used for host processor
channel interface.
• Initiator: The fibre-channel ports which will be used for TCz
communications to the RCUs must be configured as initiator ports. Initiator
mode emulates a host channel to enable the MCU to send write I/O
operations directly to the RCU target port.
Note: Two or more initiator ports must be configured before you can add
the RCUs and create the TrueCopy for z/OS pairs.
• RCU target: The fibre-channel ports in the RCU that will be used to
communicate with the MCUs must be configured as RCU target ports.
• External: This attribute can be set by the Universal Volume Manager
software. The external port is used for Universal Volume Manager, not
TrueCopy for z/OS. To use this port for TrueCopy for z/OS, please change the
attribute to the initiator, RCU target or target port.
• Initiator/External: This setting shows the combination of ports that have
an initiator port and an external port attributes. Only port that has an
initiator port attribute within these ports can be used for TrueCopy for z/OS.
This attribute cannot be changed by the TrueCopy for z/OS software. For
details on the port to which an initiator/external mix mode is set, please refer
to the Universal Volume Manager User's Guide.
Note: The port assigned to SLPR other than SLPR0 can be set to the Target
port attribute only.