Mcu Operations; Configuring Mcu Ports; Rcu Operations - HP StorageWorks XP12000 User Manual

• Continuous Access XP Asynchronous operations
groups and options
• Modifying parameters and deleting settings
• Adding consistency groups (Add CT Group)
• Modifying consistency group options (CT Group Option)
• Viewing consistency group status (CT Group Status)
• Deleting consistency groups (Delete CT Group)
• Usage Monitor operations
• History operations display Continuous Access XP history file
• Optimizing Continuous Access XP operations and disk array performance
• Discontinuing Continuous Access XP operations
The Continuous Access XP main pane provides access to all Continuous Access XP volume pair operations:
creating pairs, splitting and resyncing pairs, and viewing pair status.
pair operations

MCU operations

MCUs are disk control units that control P-VOLs of Continuous Access XP volume pairs. MCUs receive
and process user-requested Continuous Access XP commands from the Command View XP management
station or XP Remote Web Console, and send remote copy operations to RCUs. MCUs can also function
as RCUs if remote copy connections are properly configured.
To set a disk array as an MCU, configure MCU ports.
Configuring MCU ports
All Fibre Channel interface ports on the disk array have a default setting of Target port (CHF). Target
mode is used for host processor channel interfaces. Fibre Channel ports used for Continuous Access XP
communications to RCUs must be configured as Initiator ports. Fibre Channel interface ports in the RCU
used to communicate with the MCU must be configured as RCU target ports. Initiator mode emulates
a host channel, enabling the MCU to send write I/O operations directly to the RCU target port. Use
Continuous Access XP to change the configuration of the ports as needed to accommodate host and
Continuous Access XP communications paths. Two or more Initiator ports must be configured before you
can register RCUs and create Continuous Access XP pairs. For further information, see
and RCU target
Use the Port tree and Port list on the RCU Operation pane to configure MCU ports. Clicking Port in the
Switch Display box changes the tree to the Port tree and changes the list to the Port list.
1. In the Continuous Access XP main pane, click RCU Operation.
2. Click Port in the Switch Display box. The tree changes to the Port tree and the list changes to the
Port list.
3.
Click a package or port type from the Port tree. Only the selected package or port type appears in
the Port list.
4.
Click the ports of the CU you want to configure as MCUs from the Port list, right-click, and click
Initiator.
For port change operations, there is no separate pane. The list keeps displaying the Port list. For more
information about changing the port mode, see

RCU operations

RCUs are control units that control S-VOLs of volume pairs. RCUs are connected to MCUs via remote
copy connections, and receive and process commands from MCUs.
RCU operations are performed separately for each CU image of each MCU and RCU to provide
maximum flexibility in Continuous Access XP configurations. The following are RCU operations:
collect I/O statistics for LDEVs on a disk array
provides instructions for performing the Continuous Access XP volume pair operations.
ports.
configure Continuous Access XP Asynchronous
Performing Continuous Access XP
Port change operation.
Continuous Access XP user guide
Initiator ports
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