FindVMTemplatesWithNonPersistentDisks.ps1

# Set up an empty array
$arrTemplatesWithPersistentDrives = @()

# Get all the template objects
$objTemplates = Get-Template

# Loop through each template
ForEach ($objTemplate in $objTemplates){
  # Get the drives associated with that template
  $objHardDisks = $objTemplate | Get-HardDisk
  # Loop through each drive
  ForEach ($objHardDisk in $objHardDisks){
    # If any of the drives are non-persistent, add the template object to the empty array
    If ($objHardDisk.Persistence -match "non"){
      $arrTemplatesWithPersistentDrives += $objTemplate
    }
  }
}

# List the names of the unique templates in the array (as a template with more than one non-perisistent drive would appear more than once)
$arrTemplatesWithPersistentDrives | Sort-Object -Unique | Select-Object Name