6-1 advantages of linking with device manager, 6-2 required settings for external storage xp, Advantages of linking with device manager – HP XP Command View Advanced Edition Software User Manual
Page 41: Required settings for external storage xp
Preparing for and Starting Operations 41
Figure 4-4
System Configuration Using External Storage XP
When using External Storage XP, you can manage volumes of another storage subsystem as virtual
StorageWorks XP12000/XP10000 volumes by mapping them to the StorageWorks XP12000/XP10000
subsystem. In such a case, the storage subsystem connected to the StorageWorks XP12000/XP10000
subsystem is called an external subsystem. Of the volumes that the external subsystem manages, those
volumes mapped to the StorageWorks XP12000/XP10000 subsystem are called external volumes.
The volumes that the StorageWorks XP12000/XP10000 subsystem manages using External Storage XP are
called internal volumes. A port for connecting the StorageWorks XP12000/XP10000 subsystem to the external
subsystem is called an external port.
For details on StorageWorks XP12000/XP10000, refer to the HP StorageWorks External Storage XP User
Guide for the XP12000/XP10000.
4-6-1 Advantages of Linking with Device Manager
Device Manager distinguishes between internal volumes contained in StorageWorks XP12000/XP10000 and
external volumes to which LUs in the external subsystems have been mapped, and displays them separately in
the StorageWorks XP12000/XP10000 management window. If you want to allocate reliable storage to a host,
for example, you can select a volume from the internal volumes. If you want to allocate lower bit-cost storage
for use as an S-VOL for the copy pair functionality, you can select a volume from the external volumes.
From the perspective of the external subsystem connected to StorageWorks XP12000/XP10000, it is
impossible to identify that a certain LU is already used as the external volume for StorageWorks
XP12000/XP10000. So, if you remove the LUN or LUN security settings for an external volume in the external
subsystem's management window, the StorageWorks XP12000/XP10000 LU might also be deleted. To avoid
this problem, Device Manager displays which LU is used as the external volume in the external subsystem's
management window. To display whether an LU in the external subsystem is the external volume, make sure
that Device Manager has already found StorageWorks XP12000/XP10000 and the external subsystem.
4-6-2 Required Settings for External Storage XP
The following settings are required to use the External Storage XP:
1.
Use Device Manager to find StorageWorks XP12000/XP10000 and other external subsystems. Device
Manager manages the found StorageWorks XP12000/XP10000 and external subsystems.
2.
In the StorageWorks XP12000/XP10000 physical view dialog box, set a StorageWorks
XP12000/XP10000 port as an external port.
Device Manager manages the StorageWorks XP12000/XP10000 external port as a special host. The
external port acts as a host when viewed from external volumes on external subsystems. Users can
manage external volumes assigned to the external port as volumes on a special host called the external
port.