Software User Manual

the appropriate XP Continuous Access settings and options for your operational environment
and also by addressing conditions that can affect storage system performance.
• Discontinuing XP Continuous Access operations. For “Discontinuing XP Continuous Access
Operations” (page 114), you must perform the required operations (for example, pair release,
RCU deletion, port re-configuration, etc.) in a specific order to ensure smooth operations and
avoid command rejects and error conditions.
RCU Operations
The RCUs are the control units that control the S-VOLs of the XP Continuous Access pairs. The RCUs
are connected to the MCUs via the remote copy connections, and receive and process commands
from the MCUs. For XP Continuous Access operations, the Remote Web Console computer should
be install the Remote Web Console computer on a separate LAN at the remote site to allow XP
Continuous Access commands to be issued directly to the RCU (for example, in case of a disaster
or failure at the primary site).
The MCUs are the control units that control the P-VOLs of the pairs. The MCUs receive and process
user-requested XP Continuous Access commands from the Remote Web Console computer, and
send the remote copy operations to the RCUs. The MCUs can also function as RCUs, provided the
remote copy connections are properly configured.
The RCU operations are performed separately for each CU of each MCU and RCU to provide
maximum flexibility for XP Continuous Access configurations. The RCU operations are:
• Configuring the host interface ports for MCU-RCU connection
• Adding an RCU
• Changing the RCU options
• Adding and deleting logical paths to an RCU
• Adding and deleting the SSIDs for an RCU
• Viewing RCU status
• Deleting an RCU
The RCU Operation window (see “Pair Operation Window” (page 64)) allows you to perform the
RCU operations. All operations performed on the RCU Operation window have a common
procedure. To perform any operation on the RCU Operation window:
1. Click the desired display mode: MCU&RCU or Port.
2. Select the desired CU or channel adapter from the tree.
3. Select the desired RCU(s) or port(s) from the list. When adding an RCU, do not select anything
from the list.
4. Right-click the selected item(s) to display the menu.
For the MCU&RCU display, the menu commands are:
• RCU Status: Allows you to display the RCU status.
• RCU Operation: Allows you to perform the following RCU operations: add RCU (fibre)
(see “Adding an RCU” (page 84)), change RCU option (see “Changing the RCU Options”
(page 88)), and delete RCU (see “Deleting an RCU” (page 97)).
• Edit SSID(s) & Path(s): Allows you to add and delete paths (see “Adding and Deleting
Logical Paths to an RCU” (page 91)), and allows you to add and delete SSIDs (see
“Adding and Deleting SSIDs for an RCU” (page 92)).
82 Performing XP Continuous Access Configuration Operations