HP StorageWorks External Storage XP user guide (December 2005)

28 External Storage XP for the XP10000/XP12000
• Mapped LUs with different external LU attributes or reside on different arrays cannot be used to create
one LUSE volume.
• Attributes originally set for an LU on an XP external disk array (such as port security, LUN security, and
LDEV Guard attributes) are not recognized by the local disk array when the external XP LU is mapped
as a local disk array internal XP LDEV. To keep the original attributes, set those attributes on the
mapped external LU from the local disk array side.
Cache LUN XP
• A mapped external LU with IO Suppression mode set to Enable (such as for Flex Copy XP) cannot be
used for XP10000/XP12000 Cache LUN operations.
• For a mapped external LU with IO Suppression mode set to Disable (such as for External Storage XP),
Cache LUN Bind mode is not available.
LUSE and External Storage XP
• Do not combine LDEVs from multiple external LUs to create an XP10000/XP12000 LUSE volume.
• A local disk array internal XP LDEV and an external LU cannot be combined to form a LUSE volume.
• External volumes with different IO Suppression modes or different Cache Modes cannot be combined to
form a LUSE volume.
LUN manager
A mapped external LU cannot be used as a NAS system volume, but it can be used as a NAS user volume.
Hitachi Parallel Access Volume (HPAV)
To use the mapped external LU with Hitachi Parallel Access Volume operations, set the IO Suppression
mode to Disable.
Hitachi SANtinel - S/390
To use the mapped external LU with LDEV Security operations, set the IO Suppression mode to Disable.
LUN Security XP Extension
• To use a mapped external LU with LUN Security XP Extension operations, set the IO Suppression mode
to Disable.
• If you mapped the external volume and previously set the VMA of LUN Security XP Extension in that
volume, the former VMA setting is superseded when you map the volume again. However, if LUN
Security XP Extension is not installed when you remap the volume, the volume with the VMA setting
cannot be mapped. When changing the VMA setting, change it from the local disk array.
Configuration File Loader function
You cannot set the CHA mode, port, host group, or WWN for the external LU.
Preparing for External Storage XP operations
This section describes preparations required before using External Storage XP. Topics include:
• ”Installing External Storage XP” on page 28
• ”Uninstalling External Storage XP” on page 29
• ”Preparations for External Storage XP settings” on page 29
• ”Powering on and off disk arrays” on page 31
Installing External Storage XP
To perform External Storage XP operations with Command View XP or XP Remote Web Console, install an
External Storage XP license key. For more information, see the HP StorageWorks Command View XP User
Guide for XP Disk Arrays or the HP StorageWorks XP Remote Web Console User Guide for
XP12000/XP10000.