$DSList = Get-Datastore |where {$_.Type -eq 'VMFS'}

$output= ""|Select Name, NaaID

foreach($ds in $DSList)

{

 

    $output.Name =$ds.Name

    $output.NaaID=$ds.extensiondata.info.vmfs.extent.diskname

    $output

    $output|Export-csv DSList.csv -Append -NoTypeInformation

}