Get-VmfsDatastore

Function Get-VMFSDatastore {

param(
    [parameter(position=0,ValueFromPipeline=$True,ValueFromPipelineByPropertyname=$True)]
    [VMware.VimAutomation.ViCore.Types.V1.DatastoreManagement.VmfsDatastore[]]
    $Datastore = (Get-Datastore | where type -eq VMFS)

)

Process{

    ForEach ($DS in $Datastore) {
        
        if ($ds.type -eq "VMFS") {

            # Check if the datastore is expandable.

            if ($ds.Accessible) {

                $hostId = [string]($ds.ExtensionData.Host | where {$_.mountinfo.Accessible -and $_.mountinfo.Mounted} | select -ExpandProperty key -First 1)
                $DsHostDsView = get-view $hostId -Property ConfigManager.DatastoreSystem
                $DsHostDsView = get-view $DsHostDsView.ConfigManager.DatastoreSystem
                        
                $Expandable = $DsHostDsView.QueryVmfsDatastoreExpandOptions($ds.id)
                if ($Expandable.count -eq 0) {$Expandable = $false}
                else {
                    $LunSize = ($Expandable.info.VmfsExtent.end.block - $Expandable.info.VmfsExtent.start.block) * $Expandable.info.VmfsExtent.start.blocksize / 1GB
                    $FreeSpaceOnLun = [math]::round($LunSize - $ds.CapacityGB,2)
                    $Expandable = "+$($FreeSpaceOnLun)GB"
                }

            } else {$Expandable = $false}

            # Process capacity and provisioning data.

            $CapacityGB    = [Math]::Round(($ds.extensiondata.summary.capacity   / 1GB),2)
            $FreeGB        = [Math]::Round(($ds.extensiondata.summary.FreeSpace  / 1GB),2)
            $UsedGB        = [Math]::Round((($ds.extensiondata.summary.capacity  / 1GB) - ($ds.extensiondata.summary.FreeSpace / 1GB)),2)
            $ProvisionedGB = [Math]::Round((($ds.extensiondata.summary.capacity  / 1GB) - ($ds.extensiondata.summary.FreeSpace / 1GB) + ($ds.extensiondata.summary.Uncommitted / 1GB)),2)
        
            $ProvisionedPercent = [Math]::Round($ProvisionedGB / $CapacityGB * 100,1)

            [pscustomobject]@{
                Name          = $ds.name
                Accessible    = $ds.Accessible
                CapacityGB    = $CapacityGB
                FreeSpaceGB   = $FreeGB
                FreeSpace     = "$([math]::round($FreeGB / $CapacityGB * 100,1))%"
                UsedSpaceGB   = $UsedGB
                ProvisionedGB = $ProvisionedGB
                Provisioned   = "$ProvisionedPercent%"
                NbRunningVMs  = ($ds | Get-VM | where powerstate -eq Poweredon).count
                Expandable    = $Expandable
            }

        } else {"$($Datastore.name) is not a VMFS datastore"}

    }

}

}