VMware vSphere PowerCLI script to find all guests that have RDMs or raw physical disks.
$Servers=”vcenter1″
Connect-VIServer $Servers
$vms = get-cluster | get-vm
Get-VM | Get-HardDisk -DiskType “RawPhysical”,”RawVirtual” | Select Parent,Name,DiskType,ScsiCanonicalName,DeviceName | out-gridview -PassThru | Export-Csv -Path .\vm-with-rdm.csv