HP StorageWorks XP Remote Web Console Software - Manual (Page 175)

Chapter 5 Configuring Storage Systems and Logical Paths 5-5
Hitachi Universal Replicator for IBM /OS User’s Guide
Configuring Port Attributes
The administrator at both the primary site and the secondary site must
configure ports on the primary storage system and the secondary storage
system in the following ways:
• The administrator at the primary site must configure target ports, initiator
ports, and RCU target ports on the primary storage system.
• The administrator at the secondary site must configure initiator ports and
RCU target ports on the secondary storage system.
Ports on USP V storage system have the target attribute by default. If you are
configuring USP V storage systems, you must determine ports that should be
used as initiator ports or RCU target ports, and then you must change the
attribute of the ports from target to initiator or RCU target. The port attributes
are explained below:
• Target: A target port is a Fibre Channel port used for connecting a storage
system and a host. When the host issues a write request, the request will
be sent to a volume via a target port on the storage system. Target ports
must be configured on primary storage systems for URz operations.
• Initiator: An initiator port is a Fibre Channel port that sends commands to
a remote storage system. Initiator ports must be configured on both
primary and remote storage systems for URz operations.
• RCU target: An initiator port is a Fibre Channel port that receives
commands from a remote storage system. RCU target ports must be
configured on both primary and remote storage systems for URz operations.
• External: An external port is a port that is required for Universal Volume
Manager copy operations. This port will not be used for URz copy
operations.
If necessary, you can change this port to an target port, an initiator port,
or an RCU 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 URz. This attribute
cannot be changed by the URz 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: If initiator ports and RCU target ports are not configured on both
primary and remote storage systems, the following problem will occur and
remote copy operations will not be performed:
• The administrator at the primary site will be unable to create any pair of a
primary data volume and a secondary data volume.
• The secondary storage system will be unable to read data from journal
volumes in the primary storage system.