HP XP Array Manager Software - Manual (Page 82)

commands can be used to create and split pairs. To enable the system administrator to enter RAID
Manager commands from open-system hosts, you must specify at least one logical device as the command
device. You can also apply command device security to other logical devices in the storage system.
Notes : If a storage system is divided into SLPRs, and you want to prevent RAID Manager commands from
affecting multiple SLPRs, you must apply command device security to the logical volumes.
Specifying Logical Devices as Command Devices
To enable the system administrator to execute RAID Manager commands from an open-system host, you
must select at least one logical device that will not be manipulated by Continuous Access or Business
Copy, and then specify the device as the command device. When an RAID Manager command is issued
from a host, the command is received by the command device. The command device transfers the
command to another logical device. Then, the command performs an Continuous Access or Business
Copy operation on that logical device.
To specify a logical device as a command device:
1. Start LUN Manager and display the LUN Manager window ( Figure 4 on page 21).
2. In the upper-right LU Path list or the lower-right LDEV list, select and right-click the desired
logical device.
Notes :
• If nothing is displayed in the LU Path list, select a host group in the tree.
• The icons and indicate command devices.
• The icon indicates no logical device.
3. From the pop-up menu, select Command Device: Disable -> Enable.
A message appears, asking if you want to use the logical device as a command device.
4. Click the YES button to close the message.
5. Click the Apply button in the LUN Manager window.
A message appears and asks if you want to apply the setting to the storage system.
6. Click the OK button to close the message.
The settings are applied to the storage system.
Deleting Command Devices
To delete a command device:
1. Start LUN Manager and display the LUN Manager window ( Figure 4 on page 21).
2. In the upper-right LU Path list or the lower-right LDEV list, select and right-click a command
device (
or ).
3. From the pop-up menu, select Command Device: Enable -> Disable.
A message appears.
4. Click the YES button to close the message.
5. Click the Apply button in the LUN Manager window.
A message appears and asks if you want to apply the setting to the storage system.
6. Click the OK button to close the message.
The settings are applied to the storage system.
Enabling Command Device Security
To protect logical volumes from RAID Manager commands, you must apply command device security to
the logical volumes. If command device security is applied to a logical device, the logical device will not
be affected by RAID Manager commands issued via command devices from the hosts.
To apply command device security to a logical device:
1. Start LUN Manager and display the LUN Manager window ( Figure 4 on page 21).
82 Performing LUN Manager Operations