'BC - enum each datastore, summarise the VMs in each
foreach ($d in get-datastore -name SAN_S*)
{
write-host "======DATASTORE====="$d; get-vm -datastore $d |select-object name,NumCpu,MemoryMB,@{Name="GBProvisioned";expression={[math]::Truncate($_.ProvisionedSpaceGB)}}|ft
}