Using Existing Data In Mapped External Lus; Writing New Data To Mapped External Lus - HP StorageWorks XP12000 User Manual

area, use Volume Manager to format the mapped LU. For instructions, see the HP StorageWorks LUN
Configuration and Security Manager XP user guide for the XP12000/XP10000/SVS200.
To to step 4.
3. For mainframe-system emulation types (for example, 3390-XX), the status of the mapped LU is set to
Blockade, pending resizing and formatting. Use Volume Manager to format the volume. If you
mapped a volume for which the data area is already zero-formatted on the external array side, use
Volume Manager's Write to Control Blocks operation to restore the volume. For instructions, see the
HP StorageWorks LUN Configuration and Security Manager XP user guide for the
XP12000/XP10000/SVS200.
4. Configure the path from the Target port to the mapped volume to perform host I/O operations. The
mapped LDEV is available for host I/O operations.
After the path is set, host I/O operations to the mapped LU are available.
Figure 9

Writing new data to mapped external LUs

Using existing data in mapped external LUs

Figure 10 shows an example of using existing data in a mapped external LU from the host connected to
the local array.
1. From the host connected to the external array, write data to the LU in the external array.
2. Use External Storage XP to map the LU in the external array containing data as an internal LDEV of the
local array.
When mapping the external LU, set the following attributes for the mapped LU:
• Emulation type: OPEN-V
• IO Suppression mode: Disable
For more information, see
CAUTION:
external LU from the local array side. Other emulation modes require that the data space be
resized, which in effect destroys existing data. Once an external LU is mapped to the local array
for use by External Storage XP, direct host access to that LU is no longer allowed. Also set the
emulation type to OPEN-V when the VMA of LUN Security XP Extension is set for the external LU on
the external array side.
3. Configure the path from the Target port to the mapped LU to perform host I/O operations.
30 Preparing for External Storage XP operations
"Mapping external LUs (Add
You must set the emulation type to OPEN-V to read existing data in the mapped
LU)" on page 70.