HP StorageWorks XP LUN Configuration and Security Manager User Guide: HP XP12000 Disk Array HP XP10000 Disk Array HP 200 Storage Virtualization System (T1714-96030, June 2010)

Figure 76 LUSE configuration
.
Volume Manager guidelines
The following are the specifications and restrictions on LDEVs used to configure a LUSE volume:
• Open volumes (OPEN-3, OPEN-8, OPEN-9, OPEN-E, OPEN-L, and OPEN-V) are supported.
• The number of LDEVs combined into a LUSE volume must be within the range of 2 to 36.
NOTE:
The number of expanded LUs (LDEVs) should not exceed 36, even if the LUSE volume contains
another LUSE volume.
• The emulation type of LDEVs combined into a LUSE volume must be the same.
• The RAID level of LDEVs that are to be combined into LUSE volumes should be the same. (Recom-
mended).
NOTE:
Combining RAID-1 and RAID-5 volumes into the same LUSE volume is supported, but not
recommended.
• LDEVs or LUSE volumes to be combined must not have assigned path definitions. For this reason,
Hitachi TrueCopy for z/OS, Continuous Access XP, Hitachi ShadowImage for z/OS, Business
Copy XP, and Continuous Access XP Journal pair volumes cannot be targets of Volume Manager
operations (see Volume Manager operations using a path-defined LDEV).
• LDEVs to be combined into LUSE volumes must not be reserved for Auto LUN XP.
• When combining a LUSE volume with another LUSE volume, the range of LDEVs should not overlap.
Overview of Volume Manager and Custom Volume Size158