Installation and Reference Guide for HP MPIO Full Featured DSM for EVA3000/5000 VCS 4.xxx Disk Arrays 3.00.00 (AA-RW8SF-TE, March 2008)

2 Support for l oad balancing in
Failover Cluster Server environmen t
for Windows Server 2008
The 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 i
naccessible disk devices
If there is a s
tray reservation on a disk device, the device becomes inaccessible to the h ost systems
connected to it. This is because the strong reservation type (persistent reservations) sup ports load
balancing in clusters.
You can use th
e persistent reservations clear utility that comes with the HP MPIO EVA DSM package
to remove th
e stray reservations. For more information on how to use this utility, see HP MPIO EVA
DSM persistent reservations clear utility.
HP MPIO Full Featured DSM for EVA3000/5000 VCS 4.xxx Disk Arrays 3.00.00
19