#■vCenterに接続
$VIServer = "Server"
$PW = "password"
Connect-VIServer -User administrator -Password $PW $VIServer

#■出力ファイル名の日付
$time = Get-Date -Format "yyyyMMdd_HHmmss"

#■出力ファイル「vmdisks(時刻)-vCenterサーバ名.csv」に結果を出力
$VMs = get-vm |?{$_.name -like "*"}
foreach($vm in $VMs){
    $disks = $vm.guest.disks
    foreach($disk in $disks){
        $output = $vm.name + "," + $disk.path + "," + $disk.CapacityGB + "," + $disk.FreeSpaceGB
        $output |Add-Content vmdisks$time-$VIServer.csv
    }
}