$vcenter = "192.168.1.1"
$outputFile = "C:\PCLITEST\All-WWNs-" + (get-date -Format yyyy-MM-dd-HHmm) + ".csv"

"Connecting vCenter servers ..."


$report = @()

foreach ($cluster in (Get-Cluster)) {
    ("Processing cluster " + $cluster.Name + " ...")
    foreach ($vhost in (Get-VMHost -Location $cluster.Name)) {
        ("   Processing host " + $vhost.Name + " ...")
        $row = "" | select Cluster, VMHost, Dev1, WWN1, Dev2, WWN2, Dev3, WWN3, Dev4, WWN4
        $row.Cluster = $cluster.Name
        $row.VMHost = $vhost.Name
        foreach ($hba in (Get-VMHostHba -VMHost $vhost -Type FibreChannel)) {
            if ($hba.ExtensionData.Status -eq "online") {
                $wwn = ("{0:X}" -f $hba.PortWorldWideName) -replace '(..(?!$))','$1:'
                if ($row.WWN1 -eq $null) {
                    $row.Dev1 = $hba.Device
                    $row.WWN1 = $wwn
                } elseif ($row.WWN2 -eq $null) {
                    $row.Dev2 = $hba.Device
                    $row.WWN2 = $wwn
                } elseif ($row.WWN3 -eq $null) {
                    $row.Dev3 = $hba.Device
                    $row.WWN3 = $wwn
                } elseif ($row.WWN4 -eq $null) {
                    $row.Dev4 = $hba.Device
                    $row.WWN4 = $wwn
                }
            }        
        }
        $report += $row
    }
}

"Exporting report data to $outputFile ..."
$report | Export-CSV -Path $outputFile