HP XP P9500 Storage - Manual (Page 66)

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Combining command devices into a LUSE volume is not supported.
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Combining internal volumes, external volumes, and virtual volumes (V-VOLs) is not supported.
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The host mode must be neither 0C[Windows] or 01[VMware].
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LDEVs are not pool-VOLs.
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LDEVs are not JNL VOLs.
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LDEVs are not system volumes.
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LDEVs are not virtual volumes of Thin Provisioning (V-VOLs).
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LDEVs are not quorum disks.
Guidelines
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Move or back up your data, or both, before creating a LUSE volume.
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The RAID level of the LDEVs that are to be combined into LUSE volumes should be the same
(recommended). Combining RAID 1 and RAID 5 volumes into the same LUSE volume is
supported, but not recommended.
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If the top volume in the LUSE volume is an LDEV, the LDEV number of the LDEV that is combined
should be larger than the top LDEV number.
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If the top volume in the LUSE volume is a LUSE volume, the LDEV number of the LDEV that is
combined should be larger than the last LDEV number of the LUSE volume.
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The protection levels of LDEVs used to configure a LUSE volume should be the same.
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The resource group of all LDEVS used to configure a LUSE volume should be the same.
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LDEVS are not online data migration VOLs.
LUSE operations using a path-defined LDEV
When creating a LUSE volume, the top LUSE volume is either an LDEV or a LUSE volume that has
one or more paths defined to it. Only the top volume in the LUSE volume to be created can have
paths. The other volumes in the LUSE volume to be created must not have any paths.
You can perform a LUSE operation using a path-defined LDEV regardless of how many paths are
defined to the LDEV. You cannot combine a path-defined LDEV or LUSE volume with another
path-defined LDEV or LUSE volume.
When performing a LUSE operation using a path-defined LDEV, specify the host mode according
to the host operating system, as follows.
Table 1 Host mode for defined paths by operating system
Host mode Operating system
2C Windows Server 2003
2C Windows Server 2008
21 VMware
Not applicable AIX5.2
Not applicable AIX5.3
66 Configuring expanded LU provisioning