Get-ADDiskUsage.ps1

<#
    .Synopsis
        Get the disk space details of remote computers read from Active Directory.

    .Description
        This script helps you to get the disk space details of local disks and removable disks of
        remote computers using powershell. It will also get the space details of mount points.

    .Parameter SearchBase
        The Active Directory OU to search for computers to view disk details on.

    .Example
        Get-DiskSpaceDetails.ps1 -SearchBase "OU=Faculty Tablets,OU=LSHS Computers,DC=lshs,DC=org"

        Get the total disk space, free disk space, and percentage disk free space details of computers in AD OU.

    .Example
        Get-DiskSpaceDetails.ps1 -SearchBase "OU=Faculty Tablets,OU=LSHS Computers,DC=lshs,DC=org" | ? {$_."`%Freespace `(GB`)" -lt 5}

        Get all the drives which are having less than 5% free space.

    .Notes
        NAME:      Get-ADDiskUsage.ps1
        AUTHOR:     Austin Brashear
        ORIGINAL AUTHOR:    Sitaram Pamarthi
        WEBSITE:   http://techibee.com

#>

[cmdletbinding()]
param(
    [parameter(ValueFromPipeline=$true,ValueFromPipelineByPropertyName=$true)]
    [string]$SearchBase = "OU=Faculty Tablets,OU=LSHS Computers,DC=lshs,DC=org"

)

begin {

}

process {
    $Computers = get-adcomputer -SearchBase $SearchBase -Filter "*" | Where {$_.Enabled -eq "true"}
    foreach($Computer in $Computers) {
        Write-Verbose "Working on $Computer"
        if(Test-Connection -ComputerName $Computer.Name -Count 1 -ea 0) {
            $VolumesInfo = Get-WmiObject -ComputerName $Computer.Name -Class Win32_Volume | ? {$_.DriveType -eq 2 -or $_.DriveType -eq 3 }
            foreach($Volume in $VolumesInfo) {

                $Capacity   = [System.Math]::Round(($Volume.Capacity/1GB),2)
                $FreeSpace  = [System.Math]::Round(($Volume.FreeSpace/1GB),2)
                $UsedSpace  = $Capacity - $FreeSpace
                $PctFreeSpace   = [System.Math]::Round(($Volume.FreeSpace/$Volume.Capacity)*100,2)
                $OutputObj  = New-Object -TypeName PSobject
                $OutputObj | Add-Member -MemberType NoteProperty -Name ComputerName -Value $Computer.Name
                $OutputObj | Add-Member -MemberType NoteProperty -Name DriveName -Value $Volume.Caption
                $OutputObj | Add-Member -MemberType NoteProperty -Name DriveType -Value $Volume.DriveType
                $OutputObj | Add-Member -MemberType NoteProperty -Name "Capacity `(GB`)" -Value $Capacity
                $OutputObj | Add-Member -MemberType NoteProperty -Name "Used Space `(GB`)" -Value $UsedSpace
                $OutputObj | Add-Member -MemberType NoteProperty -Name "FreeSpace `(GB`)" -Value $FreeSpace
                $OutputObj | Add-Member -MemberType NoteProperty -Name "`%FreeSpace `(GB`)" -Value $PctFreeSpace
                $OutputObj# | Select ComputerName, DriveName, DriveType, Capacity, FreeSpace, PctFreespace | ft -auto
            }
        } else {
            Write-Verbose "$Computer is not reachable"
        }
    }
}

end {
}