Find orphaned VMDKs in VMware vSphere 5.x (found on the VMware forums)

find_orphaned_VMDKs.ps1

$report = @()
$arrUsedDisks = Get-View -ViewType VirtualMachine | % {$_.Layout} | % {$_.Disk} | % {$_.DiskFile}
$arrDS = Get-Datastore | Sort-Object -property Name
foreach ($strDatastore in $arrDS) {
	Write-Host $strDatastore.Name
	$ds = Get-Datastore -Name $strDatastore.Name | % {Get-View $_.Id}
	$fileQueryFlags = New-Object VMware.Vim.FileQueryFlags
	$fileQueryFlags.FileSize = $true
	$fileQueryFlags.FileType = $true
	$fileQueryFlags.Modification = $true
	$searchSpec = New-Object VMware.Vim.HostDatastoreBrowserSearchSpec
	$searchSpec.details = $fileQueryFlags
	$searchSpec.matchPattern = "*.vmdk"
	$searchSpec.sortFoldersFirst = $true
	$dsBrowser = Get-View $ds.browser
	$rootPath = "[" + $ds.Name + "]"
	$searchResult = $dsBrowser.SearchDatastoreSubFolders($rootPath, $searchSpec)

	foreach ($folder in $searchResult)
	{
		foreach ($fileResult in $folder.File)
		{
			if ($fileResult.Path)
			{
				if (-not ($arrUsedDisks -contains ($folder.FolderPath + $fileResult.Path))){
					$row = "" | Select DS, Path, File, Size, ModDate
					$row.DS = $strDatastore.Name
					$row.Path = $folder.FolderPath
					$row.File = $fileResult.Path
					$row.Size = $fileResult.FileSize
					$row.ModDate = $fileResult.Modification
					$report += $row
				}
			}
		}
	}
}