Get-DisksSpace.PS1

Function Get-DisksSpace
{
    <#
    .SYNOPSIS
        Grabs Hard Drive & Mount Point space information.
    .DESCRIPTION
        Grabs Hard Drive & Mount Point space information.

    .PARAMETER serverName
        Accepte 1 or more servernames, up to 50 at once.

    .INPUTS
        Accepts pipline input of server names

    .OUTPUTS
        SystemName, Name, SizeIn[KB|MB|GB], FreeIn[KB|MB|GB], PercentFree, Label

    .NOTES
        None.

    .LINK
        None.

    .EXAMPLE
        PS> Get-DisksSpace localhost "MB" | ft
        
    .EXAMPLE
        Get-DisksSpace localhost | Out-GridView

    .EXAMPLE
        Get-DisksSpace localhost | ft

    .EXAMPLE
        Get-DisksSpace localhost | where{$_.PercentFree -lt 20} | Format-Table -AutoSize


    #>


    [cmdletbinding()]
    param
    (
        <#[Parameter(Mandatory)]#>
        [Parameter(mandatory,ValueFromPipeline = $true,ValueFromPipelinebyPropertyname = $true)]
        [ValidateCount(1,50)]
        [string[]]$Servername='localhost',
        [Parameter()]
        [ValidateSet('KB', 'MB', 'GB')]
        [string]$unit= "GB"
    )
 process {
$measure = "1$unit"

Get-WmiObject -computername $serverName -query "
select SystemName, Name, DriveType, FileSystem, FreeSpace, Capacity, Label
  from Win32_Volume
 where DriveType = 2 or DriveType = 3" `
| select SystemName ,
         Name ,
         @{Label="SizeIn$unit";Expression={"{0:n2}" -f($_.Capacity/$measure)}} ,
         @{Label="FreeIn$unit";Expression={"{0:n2}" -f($_.freespace/$measure)}} ,
         @{Label="PercentFree";Expression={"{0:n2}" -f(($_.freespace / $_.Capacity) * 100)}} ,
          Label
 }
}#Get-DisksSpace