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)

1. If MSCS is installed on your system, move all cluster resources owned by the current node to another

node in the cluster. If this is not applicable, proceed to step 2.

2. Navigate to the HP MPIO EVA DSM installation directory <installdir> on the current node

using Windows Explorer.

3. Double-click the registry ﬁle (depending upon the operating system you are using):

•ForWindowsServer2003(32-bit):

<Target_Dir>\x86\hpegldsm_pr_on.reg

• For Windows Server 2003 (IA64):

<Target_Dir>\IA64\hpegldsm_pr_on.reg

• For Windows Server 2003 x64 Edition:

<Target_Dir>\AMD64\hpegldsm_pr_on.reg

NOTE:

The <Target_Dir> referstothefolderwhichyouhaveselectedduring

theHPMPIOEVADSMinstallation. Thedefaultinstallationdirectoryis

%ProgramFiles%\Hewlett-Packard\HP MPIO DSM\EGL DSM.

4. Follow the on-screen instructions.

5. Reboot the s ystem for the new registry parameter to take effect.

NOTE:

Once all the nodes in the cluster have the support for load balancing in MSCS enabled, you can change

the load-balancing policy for the cluster device(s) using the HP DSM CLI or HP MPIO DSM manager.

Disabling support for load balancing in MSCS environments

To disable the load balancing support in MSCS environments in HP MPIO EVA DSM, complete the

following steps:

NOTE:

You must repeat the following procedure on al l nodes in the cluster, one at a time.

1. If MSCS is installed on your system, move all cluster resources owned by the current node to another

node in the cluster. If this is not applicable, proceed to step 2.

2. Navigate to the HP MPIO EVA DSM installation directory <installdir> on the current node,

using Windows Explorer.

3. Double-click the registry ﬁle (depending upon the operating system you are using):

•ForWindowsServer2003(32-bit):

<Target_Dir>\x86\hpegldsm_pr_off.reg

• For Windows Server 2003 (IA64):

<Target_Dir>\IA64\hpegldsm_pr_off.reg

• For Windows Server 2003 x64 Edition:

<Target_Dir>\AMD64\hpegldsm_pr_off.reg

NOTE:

The <Target_Dir> refers to the folder which you have selected during

theHPMPIOEVADSMinstallation. Thedefaultinstallationdirectoryis

%ProgramFiles%\Hewlett-Packard\HP MPIO DSM\EGL DSM.

Support for load balancing in Microsoft Cluster Server environments for Windows Server 2003