here is the basis of a script you can use to generate an alert using send-mailmessage or via ops manager or something! when disk space is below a certain threshold...
$freespacethreshold = 17
# Setting path to servers.txt file for input later on...
$inputfilepath = $env:USERPROFILE + "\Desktop"
$inputfilename = "servers.txt"
$workingfile = $inputfilepath + "\" + $inputfilename
#does the file exist?
$fileexist = test-path $workingfile
if ($? -eq $false)
Write-Host "$inputfilename does not exist on $infputfilepath" -ForegroundColor Red -BackgroundColor Black
Write-Host "Please Create the file with one server per line that you want checked" -ForegroundColor Red -BackgroundColor Black
#read the file into a variable for later processing
$servers = Get-Content $workingfile
# Step 1 this is to check the disk space and alert if their is 10% or less free
foreach ($s in $servers)
$logicaldisks = Get-WmiObject -ComputerName $s Win32_Logicaldisk
Foreach ($l in $logicaldisks)
$totalsize = $l.size
$freespace = $l.freespace
if ($freespace -gt 0)
$percentagefree = ($freespace / $totalsize ) * 100
Write-Host $l.deviceid " has " $percentagefree "% free"
if ($percentagefree -lt $freespacethreshold)
Write-Host "Health Alert!" -ForegroundColor Red -BackgroundColor Black
Write-Host "Drive " $l.deviceid " has less the $freespacethreshold % free"