Initiator Ports And Rcu Target Ports; Command View Xp Management Station Or Xp Remote Web Console - HP StorageWorks XP12000 User Manual

• With direct connect Fibre Channel (no switch), fibre remote copy supports 1-to-1 remote copy
connections. One array as an MCU can be connected to only one array as an RCU via optical
fibre cables. For CU images within one array, 1-to-4 and 4-to-1 remote copy connections are
supported via direct connects or an FC switch.
One MCU port (initiator port) can be connected to 64 RCU ports (RCU target ports). One RCU port can
be connected to 16 MCU ports. However, the number of logical paths that can be specified does not
depend on the number of connectable RCU or MCU ports.
HP strongly recommends you establish at least two independent remote copy connections (one per cluster)
between each MCU and RCU to provide hardware redundancy for this critical communications path.
NOTE:
To recover data from a disaster, prepare the RCU-MCU paths in addition to the usual MCU-RCU paths.
For more information, see
When you set the RCU-MCU path, you must also specify:
• The same combination of CU images as when you set the MCU-RCU path if you set the MCU-RCU
path and specify the CU image.
• CU Free if you set the MCU-RCU path and specify CU Free.

Initiator ports and RCU target ports

Initiator ports are dedicated Fibre Channel interface ports on the main disk array (MCU) to which RCUs
(RCU target ports) are connected. Initiator ports connect to RCUs to send write I/O operations directly
to RCUs. You can configure Fibre Channel interface ports of the array as initiator ports. Use the Port
Change operation (see
ports (ordinary target port, initiator port, or RCU target port) as needed.
NOTE:
Initiator ports cannot communicate with hosts, but are used exclusively as Continuous Access XP talkers.
Ordinary target ports can be used only for host connect (not for Continuous Access XP).
RCU target ports are (Continuous Access XP) dedicated Fibre Channel interface ports on the remote
disk array (RCU) to which MCUs (initiator ports) are connected. You can configure Fibre Channel
interface ports of the array as RCU target ports. For performance reasons, RCU target ports should not
be shared with host connects.

Command View XP management station or XP Remote Web Console

The Command View XP management station is attached to the array on the internal LAN via a TCP/IP
connection. The Command View XP management station communicates with each attached array.
The Command View XP management station at the primary site must be connected to the MCU of each
Continuous Access XP pair. A second Command View XP management station should be installed at the
remote site and connected to the RCUs. With another Command View XP management station at the
remote site, you can modify the Continuous Access XP Asynchronous options of the RCU (for example,
pending update data rate or offloading timer) and access the Continuous Access XP S-VOLs (for example,
to perform media maintenance). To perform Continuous Access XP operations in the reverse direction
from the remote site to the primary site (for example, disaster recovery), Continuous Access XP simplifies
and expedites this process.
Alternatively, you can access XP Remote Web Console directly on the MCUs and RCUs to manage
their respective disk arrays.
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Continuous Access XP for the Array
Registering RCUs (Add
Port change operation) to change the configuration of the array Fibre Channel
RCU).