$VC = Connect-VIServer (Read-Host "VC Server")
$output = Read-Host "Output file"
function UsedSpace
{
	param($ds)
	[math]::Round(($ds.CapacityMB - $ds.FreeSpaceMB)/1024,2)
}

function FreeSpace
{
	param($ds)
	[math]::Round($ds.FreeSpaceMB/1024,2)
}

function PercFree
{
	param($ds)
	[math]::Round((100 * $ds.FreeSpaceMB / $ds.CapacityMB),0)
}

$Datastores = Get-Datastore
$myCol = @()
ForEach ($Datastore in $Datastores)
{
	$myObj = "" | Select-Object Datastore, UsedGB, FreeGB, PercFree
	$myObj.Datastore = $Datastore.Name
	$myObj.UsedGB = UsedSpace $Datastore
	$myObj.FreeGB = FreeSpace $Datastore
	$myObj.PercFree = PercFree $Datastore
	$myCol += $myObj
}
Disconnect-VIServer -Confirm:$False
$myCol | Sort-Object PercFree | ConvertTo-Html | Out-File $output
Invoke-Item $output