<#

Script name: SetMultiPathToRoundRobin.ps1

Created on: 09/13/2017

Author: Alan Comstock, @Mr_Uptime

Description: Set the MultiPath policy for FC devices to RoundRobin

Dependencies: None known

PowerCLI Version: VMware PowerCLI 6.5 Release 1 build 4624819

PowerShell Version: 5.1.14393.1532

OS Version: Windows 10

#>

#Check a host for any Fibre Channel devices that are not set to Round Robin. Modify to check clusters if needed.

Get-VMhost HOSTNAME | Get-VMHostHba -Type "FibreChannel" | Get-ScsiLun -LunType disk | Where { $_.MultipathPolicy -notlike "RoundRobin" } | Select CanonicalName,MultipathPolicy

#Set the Multipathing Policy on a host to Round Robin for any Fibre Channel devices that are not Round Robin

$scsilun = Get-VMhost HOSTNAME | Get-VMHostHba -Type "FibreChannel" | Get-ScsiLun -LunType disk | Where { $_.MultipathPolicy -notlike "RoundRobin" }

Set-ScsiLun -ScsiLun $scsilun -MultipathPolicy RoundRobin