<# Script name: SetClusterMultiPathToRoundRobin.ps1 Created on: 09/14/2017 Author: Alan Comstock, @Mr_Uptime Description: Set the MultiPath policy for FC devices to RoundRobin and IOPS to 1 for all hosts in a cluster based upon the vendor tag. Dependencies: None known PowerCLI Version: VMware PowerCLI 6.5 Release 1 build 4624819 PowerShell Version: 5.1.14393.1532 OS Version: Windows 10 #> $pathpolicy="RoundRobin" $iops="1" $vendor="3PARdata" $AllESXHosts = Get-VMHost -Location CLUSTERNAME | Sort Name Foreach ($esxhost in $AllESXHosts) { Write-Host "Working on" $esxhost $scsilun = Get-VMhost $esxhost | Get-VMHostHba -Type "FibreChannel" | Get-ScsiLun -LunType disk | Where-Object {$_.Vendor -like $vendor -and ($_.MultipathPolicy -notlike $pathpolicy -or $_.CommandsToSwitchPath -ne $iops)} if ($scsilun -ne $null){ Set-ScsiLun -ScsiLun $scsilun -MultipathPolicy $pathpolicy -CommandsToSwitchPath $iops } } #The End