Here is the answer from the readme on the lastest version of full featured MPIO for EVA. It can do it with this version.
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VI. HP MPIO Full Featured DSM Configuration Settings
1. Load balancing in Microsoft Cluster (MSCS) Environments:
This version of HP MPIO Full Featured DSM for EVA4000/6000/8000
family of Disk Arrays supports I/O load balancing in Microsoft
Cluster environments with the help of persistent reservations.
Load balancing in Microsoft Cluster environments is supported
only if (i) all nodes in cluster have this version of the
product installed (ii) the DSM on all nodes in cluster is
enabled to use persistent reservations and (iii) the disk
array is running a firmware that supports persistent
reservations.
For details on firmware revisions that support persistent
reservations, please contact HP support.
The Load balancing feature in Microsoft Cluster environments
is disabled by default in the DSM.
* Enabling load balancing in an MSCS environment:
The following operation needs to be performed on all the
cluster nodes, one at a time:
* For new and upgrade installations of the DSM, load
balancing can be enabled during installation by choosing
the "Enable Load Balancing in Cluster" option in the
Configuration Settings window of HP MPIO Full Featured DSM
for EVA4000/6000/8000 family of Disk Arrays Setup.
* Alternately, this option can be enabled at any time later
by following the sequence below:
- Open an Explorer window and navigate to the DSM
installation directory.
- Double-click the file hpeaadsm_pr_on.reg and follow the
onscreen instructions.
This file will make the following entry in the registry:
Under "HKEY_LOCAL_MACHINE\System\CurrentControlSet\
Services\hpeaadsm\Parameters", a value named
"UsePersistentReservations" (DWORD) is set to 1.
- Reboot the system for the changes to take effect.
* Disabling load balancing in an MSCS environment:
The following operation needs to be performed on all the
cluster nodes, one at a time:
- Open an Explorer window and navigate to the DSM
installation directory.
- Double-click the file hpeaadsm_pr_off.reg and follow the
onscreen instructions.
This file will make the following entry in the registry:
Under "HKEY_LOCAL_MACHINE\System\CurrentControlSet\
Services\hpeaadsm\Parameters", a value named
"UsePersistentReservations" (DWORD) is set to 0.
- Reboot the system for the changes to take effect.
IMPORTANT: The Load Balancing in Cluster feature setting in the
DSM must be consistent across all cluster nodes.
* Persistent reservations clear utility (hpprutil.exe):
If there is a stray persistent reservation on an EVA device,
the device may not be accessible from host systems. The
persistent reservations clear utility can be used to remove
such reservations from the device, thereby allowing host
systems to access the same.
This utility is located on the installation media (CD). It
is also copied to the installation directory by Setup. For
more information on using this utility, type "hpprutil /?" at
the command prompt.
WARNING: Using this utility incorrectly can cause serious
problems that may result in loss of data and/or incorrect
operation of the Microsoft Cluster Sevice. HP cannot guarantee
that problems that result from the incorrect use of this
utility can be solved.
