tests/Test-CmDPDiskSpace.ps1

function Test-CMDPDiskSpace {
    [CmdletBinding()]
    param (
        [parameter()][string] $TestName = "Test-CMDPDiskSpace",
        [parameter()][string] $TestGroup = "operation",
        [parameter()][string] $Description = "Check disk space status on all DPs",
        [parameter()][hashtable] $ScriptParams
    )
    try {
        [int]$MaxPctUsed = Get-CmHealthDefaultValue -KeySet "siteservers:DiskSpaceMaxPercent" -DataSet $CmHealthConfig
        Write-Verbose "MaxPctUsed = $MaxPctUsed"

        [System.Collections.Generic.List[PSObject]]$tempdata = @() # for detailed test output to return if needed
        $stat = "PASS" # do not change this
        $msg  = "No issues found" # do not change this either
        Write-Verbose "requesting list of DP servers"
        $query = "select ServerName from v_DistributionPointInfo order by ServerName"
        [array]$dplist = Invoke-DbaQuery -SqlInstance $SqlInstance -Database $Database -Query $query
        Write-Verbose "$($dplist.Count) DP server names returned"
        foreach ($dp in $dplist) {
            if ($ScriptParams.ComputerName -ne $env:COMPUTERNAME) {
                $cs = New-CimSession -Credential $ScriptParams.Credential -Authentication Negotiate -ComputerName $dp
                $res = @(Get-CimInstance -CimSession $cs -ClassName Win32_LogicalDisk -Filter "DriveType = 3")
            } else {
                $res = @(Get-CimInstance -CimSession $cs -ClassName Win32_LogicalDisk -Filter "DriveType = 3")
            }
            if ($res.Count -gt 0) {
                foreach ($disk in $res) {
                    $size = $disk.Size
                    $free = $disk.FreeSpace
                    $used = $size - $free
                    $pct  = $([math]::Round($used / $size, 1)) * 100
                    if ($pct -gt $MaxPctUsed) {
                        $tempData.Add([pscustomobject]@{Computer=$(dp);Drive=$($disk.DeviceID);Size=$($size);Used=$pct})
                        $stat = "WARNING"
                    } else {
                        $tempData.Add([pscustomobject]@{Computer=$(dp);Drive=$($disk.DeviceID);Size=$($size);Used=$pct})
                    }
                } # foreach
                $msg = "$($tempData.Count) issues were found"
            }
        } # foreach
    }
    catch {
        $stat = 'ERROR'
        $msg = $_.Exception.Message -join ';'
    }
    finally {
        Write-Output $([pscustomobject]@{
            TestName    = $TestName
            TestGroup   = $TestGroup
            TestData    = $tempdata
            Description = $Description
            Status      = $stat
            Message     = $msg
            Credential  = $(if($ScriptParams.Credential){$($ScriptParams.Credential).UserName} else { $env:USERNAME })
        })
    }
}