HP MPIO Full Featured DSM for P6x00 family of Disk Arrays 4.04.00 Installation and Reference Guide (757324-001, May 2014)

2 Support for load balancing in Failover Cluster Server
environment for Windows Server 2012
Load balancing for the cluster devices is enabled by default and cannot be turned OFF.
This section describes the following:
• “Recovering inaccessible disk devices”
Recovering inaccessible disk devices
If there is a stray reservation on a disk device, the device becomes inaccessible to the host systems
connected to it. This is because the strong reservation type (persistent reservations) supports load
balancing in clusters.
You can use the persistent reservations clear utility that comes with HP MPIO EVA DSM package
to remove the stray reservations. For more information on how to use this utility, see “HP MPIO
EVA DSM persistent reservations clear utility”.
NOTE: Set the array host mode on the HP Command View EVA to Microsoft Windows 2008 for
Microsoft Windows Server 2012 and Microsoft Windows Server 2012 R2 failover cluster to work
properly.
12 Support for load balancing in Failover Cluster Server environment for Windows Server 2012