HP StorageWorks External Storage XP user guide for the XP12000, XP10000, SVS200 (T1706-96009, October 2007)

Using mapped external LUs from the host connected to the

local array

The following sections describe examples of using the mapped external LU from the host connected

the local array

Writing new data to mapped external LUs

Figure 9 shows an example of writing new data in the mapped external LU from the host connected to

the local array.

1. Use the External Storage XP GUI to map the LU in the external array as an internal LDEV of the

local array.

CAUTION:

You can select the mapped volume's emulation type as required. If you select an emulation

type for an open-system (such as OPEN-V), go to step 2. If you select an emulation type for

amainframesystem(suchas3390-3),gotostep3

For more information, see Mapping external LUs (Add LU).

2. For open-system emulation types (such as OPEN-V, which HP recommends), the status of the mapped

LDEV is set to Normal and is not automatically formatted. To optimally initialize the mapped LU's

data 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.

Go 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.

Preparing for External Storage XP operations