This rather simple script will take one or more, local or remote, computer(s) as input and return an object with disk volume information. Should be easy enough to understand, but I’ll try to add some get-help stuff to it later.

#Requires -Version 2

[CmdletBinding()]

param(
[Parameter(ValueFromPipeline = $true, ValueFromPipelinebyPropertyName = $true)]
[String[]]$ComputerName = ([System.Net.Dns]::GetHostName()),
[string]$sizeformat = "1GB"
)

BEGIN{}

PROCESS {
foreach ($computer in $ComputerName){

try {$wmi = Get-WmiObject -ComputerName $computer -ErrorAction Stop -Query "SELECT Systemname,Name,Driveletter,Label,Capacity,Freespace FROM Win32_Volume WHERE DriveType=3"|Select-Object Systemname,Name,Driveletter,Label,Capacity,Freespace}catch{}
$volumeObject = @()
foreach ($volume in $wmi){
if ($wmi){
$capacity = [System.Convert]::ToDecimal((($volume.capacity)/$sizeFormat).ToString("#.00"))
$freespace = [System.Convert]::ToDecimal((($volume.freespace)/$sizeFormat).ToString("#.00"))
$percentfree = [System.Convert]::ToDecimal((($volume.freespace/$volume.capacity)*100).ToString("#.00"))
}

$obj = New-Object -TypeName PSObject
$obj | Add-Member -MemberType NoteProperty -Name Input -Value $computer -PassThru |
Add-Member -MemberType NoteProperty -Name SystemName -Value $volume.Systemname -PassThru |
Add-Member -MemberType NoteProperty -Name Name -Value $volume.Name -PassThru |
Add-Member -MemberType NoteProperty -Name Driveletter -Value $volume.Driveletter -PassThru |
Add-Member -MemberType NoteProperty -Name Label -Value $volume.Label -PassThru |
Add-Member -MemberType NoteProperty -Name Capacity -Value $capacity -PassThru |
Add-Member -MemberType NoteProperty -Name Freespace -Value $freespace -PassThru |
Add-Member -MemberType NoteProperty -Name PercentFree -Value $percentfree

$volumeObject += $obj}

Write-Output $volumeObject}}

END{}