HP XP External Storage Software - Manual (Page 72)

Set External Volume Parameter Dialog Box
Use the Set External Volume Parameter dialog box to set the external volume parameter. The Set
External Volume Parameter dialog box opens when you right-click the external volume in the Add
Volume dialog box and click the Set External Volume Parameter in the pop-up menu.
Figure 25 Set External Volume Parameter Dialog Box
The Set External Volume Parameter dialog box consists of:
•
ExG (1-16384)
Group number of the connected external volume. Specify the number using decimal numbers
from 1 to 16384. The E displayed outside of the text box is the capital letter of the external
volume group.
•
Emulation Type
Select the emulation type of the mapped external volume from the list.
Before you map the external volume as an open system volume, first decide the emulation
type for the mapped volume, OPEN-V or other than OPEN-V. To map the external volume as
an open system volume with the emulation type other than OPEN-V, select the Except OPEN-V
check box.
◦ When you clear the Except OPEN-V check box, OPEN-V and available mainframe
emulation types appear in the list.
◦ When you select the Except OPEN-V check box, the emulation types for the open system
other than OPEN-V also appear in the list.
•
Number of LDEVs
Select the maximum number of LDEVs that can be created in the external volume when you
map the external volume. This number is different corresponding to the capacity supported
by the emulation type specified in the Emulation Type. The number of LDEVs which are actually
created in the external volume appears in the Number of LDEVs column in the Add Volume
dialog box after you set this parameter in the Set External Volume Parameter dialog box.
•
Cache mode
Cache mode specifies if the write data from the host is propagated synchronously (Disable)
or asynchronously (Enable) to the external storage system.
Data that is not written by the host (for example, data written by XP Business Copy) is
asynchronously destaged to the external storage system regardless of the Cache Mode setting.
If you set Disable, the bind mode of Cache Residency Manager cannot be set.
72 Performing XP External Storage Operations