HP StorageWorks XP Remote Web Console Software - Manual (Page 50)

50 External Storage XP for the XP10000/XP12000
Auto Map Setting window
Figure 28 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 XP10000/XP12000.
To map the external LU as an open system volume, select the emulation type from the list. As you clear
the Except OPEN-V check box, OPEN-V and available mainframe emulation types are displayed in the
list. As you select the Except OPEN-V check box, the emulation types for the open systems other than
OPEN-V are also displayed in the list. To map the external LU as an open system LU using an emulation
type other than OPEN-V, select the Except OPEN-V check box. Other emulation types then appear in
the list.
If you plan to use the mapped external LU as part of a Flex Copy pair, specify OPEN-V. Due to the
advantages of the OPEN-V emulation type, it is recommended to be the default type for use with
External Storage XP.
• Create LDEVs
Number of LDEVs created based on capacity supported by the emulation type specified in the
Emulation Type box.
• IO Suppression
For OPEN-V emulation only. To suppress I/O operations from hosts (by way of the
XP10000/XP12000) to the mapped external LU or use the mapped external LU as part of a Flex Copy
XP pair, select Enable. If you do not want to suppress I/O from hosts to the mapped external LU, select
Disable (for example, for External Storage XP).
If you set the emulation type to something different than OPEN-V, I/O Suppression mode is set to
Disable automatically.
CAUTION: If you want to use the mapped external LU for products other than Flex Copy XP, such
as Cache LUN XP, Continuous Access XP, Continuous Access XP Journal, and Business Copy XP, set
the I/O Suppression mode to Disable. To set the I/O Suppression mode to Disable, Volume
Manager XP must be installed.
CAUTION: To set the IO Suppression mode to Enable, Flex Copy XP must be installed.
• Cache Mode
Specifies whether I/O operations use the XP10000/XP12000 cache memory when host I/O is
performed. If you select Enable (the recommended setting for External Storage XP), the host I/O first