Users Guide

MPIO Timer Value

HKLM\system\CurrentControlSet\Services\MPIO\Parameters

\PathRecoveryInterval

CAUTION: Always back up your registry les (system.dat and user.dat) before editing the registry.

CAUTION: Using Registry Editor incorrectly can cause serious problems that may require you to reinstall Windows. Dell cannot

guarantee that problems resulting from the incorrect use of Registry Editor can be solved. Use Registry Editor at your own risk.

For information on how to edit the registry, see the Changing Keys And Values online help topic in Registry Editor (regedit.exe).

Clustering setup in Windows

The following registry entries are required on each node of the cluster to enable them to see the drives on the Shared PERC 8:

Table 5. Registry entries

Location Entry type Property Value

HKLM\SYSTEM

\CurrentControlSet\Services

\ClusDisk\Parameters

DWORD AllowBusTypeRAID 0X01

Cluster Setting: QuorumArbitrationTimeMax = 90

This value shall be increased to 90 from a default value of 20. This allows the clustered solution to tolerate a controller failover, which can

sometimes take up to 80 seconds.

To change the QuorumArbitrationTimeMax registry value using PowerShell for Windows Server 2012 and Windows Server 2012 R2, do

the following:

1 From a cluster node, open an elevated PowerShell prompt.

2 Run the following command with the appropriate value:

Get-Cluster | %{ $_. QuorumArbitrationTimeMax = 90}

3 To conrm the QuorumArbitrationTimeMax value has changed on the cluster run:

Get-Cluster | fl *

For more details on setting up clustering in Windows environments, see Building Microsoft Windows Server 2012 Clusters on the Dell

PowerEdge VRTX.

Conguring multipath support in VMware

In VMware, multipath support is automatically enabled using Native Multipathing (NMP) for all Shared PERC 8 cards in Dell versions of the

ESXi operating systems.

NOTE

: The recommended multipath policy is Most Recently Used (MRU).

Multipath and clustering setup in VMware

Multipath Settings—No recommended settings beyond the default settings

Cluster Settings:

In VMware, LUN contention can be an issue with large cluster deployments. Below are some guidelines and settings Dell recommends that

you use when conguring a cluster with shared storage:

Multipath and clustering setup