installation and reference guide HP MPIO Full Featured DSM for MSA1000/1500 (Active-Active) Disk Arrays 3.02.00 (AA-RW8AF-TE, March 2009)

2 Support for load balancing in Failover
Cluster Server environment for Windows
Server 2008
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 MSA DSM package to
remove the stray reservations. For more information on how to use this utility, see HP MPIO MSA
DSM persistent reservations clear utility.
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