Here is a VMware vSphere PowerClI script that will find all datastores that are of the model Hitachi – Open-V, set the multipath policy to RoundRobin if it is anything else.
$clustername = ‘clustersomething’
$datastore = get-datastore# Find datastores by HITACHI, model OPEN-V and multipath not RoundRobin and Change to RoundRobin
$disks = get-cluster $clustername | get-vmhost | get-scsilun -luntype disk | where {$_.Vendor -eq “HITACHI” -And $_.Model -eq “OPEN-V” -And $_.MultipathPolicy -ne “RoundRobin”} | Set-ScsiLun -MultipathPolicy “RoundRobin”#Test the policy for one ESX host
#$disks = get-vmhost esx-host-name | get-scsilun -luntype disk | where {$_.Vendor -eq “HITACHI” -And $_.Model -eq “OPEN-V” -And $_.MultipathPolicy -ne “RoundRobin”} | Set-ScsiLun -MultipathPolicy “RoundRobin”$entry = @()
$output = @()
ForEach ($disk in $disks){$disk | Export-Csv .\disk.txt
$entry = “” | Select DataStorename, HostName, Canonicalname, Multipathing
$entry.datastorename= $datastore | Where-Object {($_.extensiondata.info.vmfs.extent | %{$_.diskname}) -contains $disk.canonicalname}|select -expand name
$entry.HostName = $disk.VMHost.Name
$entry.canonicalname=$disk.canonicalname
$entry.multipathing=$disk.multipathpolicy
$output += $entry
}
$output | Export-csv ‘c:\apply-multipath-result.csv’#Write result to screen
#write-output $output