#Requires -Modules PoshRSJob, PoshPctBar, ActiveDirectory
function New-StorageReport {
    <#
	.SYNOPSIS
		Creates a new Server Storage Report.
	.DESCRIPTION
		The New-StorageReport function creates a new Storage Report of local disks on all servers in a specific Organizational Unit in Active Directory.
	.INPUTS
		None.
	.OUTPUTS
		PSCustomObject
	.NOTES
		Please remember to edit the $OrgUnit variable before running this function.
	.EXAMPLE
		PS C:\> New-StorageReport
		This command will generate a storage report and output the result to the PowerShell host.
    .EXAMPLE
		PS C:\> $Report = New-StorageReport
		This command will generate a storage report and store the output in a variable for future sorting, filtering, or other usage.
    .EXAMPLE
		PS C:\> New-StorageReport | Select-Object * | Export-CSV -Path C:\Temp\StorageReport.csv -NoTypeInformation
		This command will generate a storage report and export the result to a CSV file for manual manipulation.
	#>

    $JobBlock = {
        if (Test-Connection -ComputerName $_.Name -Count 1 -Quiet) {
            $DefaultDisplaySet = 'ComputerName', 'DriveLetter', 'SizeGB', 'Usage'
            $DefaultDisplayPropertySet = New-Object System.Management.Automation.PSPropertySet(‘DefaultDisplayPropertySet’, [String[]] $DefaultDisplaySet)
            $PSStandardMembers = [System.Management.Automation.PSMemberInfo[]]@($DefaultDisplayPropertySet)

            $ComputerName = $_.Name
            $ManagedBy = ($_.ManagedBy -split ",*..=")[1]

            try {
                $WmiSplat = @{
                    ComputerName = $ComputerName
                    Class        = 'Win32_LogicalDisk'
                    Filter       = 'DriveType = 3 AND VolumeName != "RESERVED_PAGING_FILE"'
                    Property     = 'DeviceID', 'FreeSpace', 'Size', 'VolumeName'
                    ErrorAction  = 'Stop'
                }

                $Disks = Get-WmiObject @WmiSplat

                foreach ($Disk in $Disks) {
                    $PctUsed = ($Disk.Size - $Disk.FreeSpace) / $Disk.Size

                    $DiskObj = [PSCustomObject] [Ordered] @{
                        ComputerName    = $ComputerName
                        ManagedBy       = $ManagedBy
                        DriveLetter     = $Disk.DeviceID
                        VolumeName      = $Disk.VolumeName
                        SizeRemaining   = $Disk.FreeSpace
                        SizeRemainingGB = [Math]::Round($Disk.FreeSpace / 1GB, 2)
                        Size            = $Disk.Size
                        SizeGB          = [Math]::Round($Disk.Size / 1GB, 2)
                        Usage           = New-PercentBar -Percent $PctUsed -BarCharacter '▓'
                    }

                    $DiskObj | Add-Member MemberSet PSStandardMembers $PSStandardMembers
                    $DiskObj
                }
            } catch {
                $DiskObj = [PSCustomObject] [Ordered] @{
                    ComputerName    = $ComputerName
                    ManagedBy       = $ManagedBy
                    DriveLetter     = $null
                    VolumeName      = $null
                    SizeRemaining   = $null
                    SizeRemainingGB = $null
                    Size            = $null
                    SizeGB          = $null
                    Usage           = $_.Exception.Message
                }

                $DiskObj | Add-Member MemberSet PSStandardMembers $PSStandardMembers
                $DiskObj
            }
        }
    }

    $OrgUnit = 'OU=servers,OU=computers,OU=corp,DC=example,DC=com'
    $Servers = Get-ADComputer -Filter {(OperatingSystem -like '*Server*') -and (Enabled -eq $True)} -SearchBase $OrgUnit -Properties ManagedBy
    $Servers | Select * | Start-RSJob -ScriptBlock $JobBlock -Name {$_.Name} | Wait-RSJob -ShowProgress | Receive-RSJob
}