HP StorageWorks External Storage XP user guide (T1706-96006, June 2006)

External Storage XP user guide 81
CAUTION: If the LUs you are mapping include a volume with the VMA setting, you cannot use the Add LU
(AUTO) command to map them at one time.
Use the Auto Map Setting and Select LDEV windows (Figure 49) for mapping multiple external LUs at one
time.
Figure 48 Auto Map Setting window
• ExG (1-16384)
Group number containing the specified external LU. Specify any decimal value from 1 to 16384. The E
displayed outside of the text box is the capital letter of the external LU group.
• Emulation Type
Emulation type of the external LU from the perspective of the XP12000/XP10000/SVS200 (see
”External LU attributes set by mapping” on page 20).
If you clear the Except OPEN-V check box, OPEN-V and available mainframe emulation types appear
in the list.
If you select the Except OPEN-V check box, open-system emulation types other than OPEN-V also
appear in the list. To map the external LU as an open system LU, decide the mapped LU’s emulation
type, either OPEN-V or other than OPEN-V. To map the external LU as an open-system LU with an
emulation type other than OPEN-V, select the Except OPEN-V check box.
If you plan to use the mapped external LU for a Flex Copy XP pair, you must specify OPEN-V.
When the external LU to be mapped has the VMA setting, you must select OPEN-V.
Due to the advantages of the OPEN-V emulation type, HP recommends OPEN-V as the default type for
use with External Storage XP.
• Create LDEVs
Number of LDEVs that can be mapped based on the capacity supported by the emulation type
specified in the Emulation Type box. Select the number of LDEVs you want to map from the Create
LDEVs list. The default is Full. When Create LDEVs is Full, the maximum number of LDEVs that can be
created based on the capacity supported by the specified emulation type are mapped. The total
number of LDEVs being mapped appears at Total.
• IO Suppression
When you specify the OPEN-V emulation type, you can specify the mapped LU’s IO Suppression mode
(see ”External LU attributes set by mapping” on page 20).
If you suppress I/O operations from hosts (by way of the XP12000/XP10000/SVS200) to the mapped
external LU or use the mapped external LU for a Flex Copy XP pair, select Enable.
If you do not suppress I/O from hosts to the mapped external LU, select Disable (for example, for
External Storage XP).
When setting the emulation type to something other than OPEN-V, I/O Suppression mode is
automatically set to Disable.