HP XP Continuous Access Software - Manual (Page 93)

Ports on the array have the target attribute by default. If you are configuring an array, determine
which ports should be initiator or RCU target ports, and change the ports' attributes from target to
initiator or RCU target.
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Target: A target port is a Fibre Channel port used to connect an array and a host. When the
host issues a write request, the request is sent to a volume through a target port on the array.
You must configure target ports on primary arrays for XP Continuous Access Journal operations.
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Initiator: An initiator port is a Fibre Channel port that sends commands to a remote array.
You must configure initiator ports on primary and remote arrays for XP Continuous Access
Journal operations.
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RCU target: An initiator port is a Fibre Channel port that receives commands from a remote
array. You must configure RCU target ports on primary and remote arrays for XP Continuous
Access Journal operations.
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External: An external port is a port that is required for External Storage XP copy operations.
This port is not used for XP Continuous Access Journal copy operations.
If necessary, you can change this port to a target, initiator, or RCU target port.
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Initiator/external: A port with a combination of initiator and external port attributes. You can
use a port with this attribute for both XP Continuous Access Journal and for external storage
remote command devices. You cannot change this attribute using the XP Continuous Access
Journal GUI. For more information about ports with the Initiator/External MIX attribute, see
the HP StorageWorks External Storage XP user guide.
CAUTION: Before changing a Fibre Channel port to an initiator port, disconnect the port from
the host, delete all affected data volume pairs, delete all logical paths from the initiator port to the
remote array, and remove all channel paths to the port.
CAUTION: Before changing a Fibre Channel port from initiator to target or RCU target, delete
all affected data volume pairs, delete all logical paths from the initiator port to the remote array,
and disconnect the local and remote arrays.
CAUTION: Limit the number of hosts connected to a target port to 128 or fewer to avoid mistaken
disconnections. If more than 128 hosts are connected to a target port, some hosts may be
disconnected after changing the type from target to RCU target.
NOTE: If initiator and RCU target ports are not configured on the primary and remote arrays,
the following problems occur and remote copy operations are not performed:
•
The administrator at the primary site cannot create pairs for primary and secondary volumes.
•
The secondary array cannot read data from journal volumes in the primary array.
NOTE: A port assigned to SLPR other than SLPR0 can be set to a Target port attribute only.
To configure a Fibre Channel port's attributes, the primary and remote array administrators must
perform the following procedure:
1. Ensure that XP Command View Advanced Edition Software or XP Remote Web Console is in
Modify mode. For more information, see the HP StorageWorks XP Command View user guide
for XP Disk Arrays or the HP StorageWorks XP Remote Web Console user guide for
XP12000/XP10000/SVS200.
2. Display the DKC Operation pane (see Displaying the DKC Operation pane ).
3. In the Switch Display box, select Port. The tree displays channel adapters in the local array
and port attributes.
4. Do one of the following:
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Select a channel adapter from the tree.
•
Select a port attribute (that is, target, RCU target, or initiator) from the tree.
Configuring port attributes 93