PowerShell Disk Capacity Active Monitoring

Scott Prince (Customer) asked a question.

December 21, 2023 at 6:03 PM

Hello, my organization is looking to setup an active monitor that monitors available disk capacity, basically we'd like to monitor all logical disks and have a monitor alert if and when the disk drops below 10% of available capacity.

I have setup a basic PS script to check all disks and failures within the $context.SetResult however the result, when testing in WUG always returns as 0 (no disks are below capacity), if I was to comment out the $context.SetResult and run the script on a known server where a disk has less than 10% capacity then the script returns the correct outputs into $result = 1 & $ResultText = "Disks with less than 10% free space: $($failedDisks -join ', ')"

Would anyone be able to advise me exactly where I'm going wrong when I copy the script into WUG.

$disks = Get-WmiObject Win32_LogicalDisk | Where-Object { $_.DriveType -eq 3 } # Retrieves logical disks excluding CD-ROM, network drives, etc.
$result = 0
$failedDisks = @()
 
ForEach ($disk in $disks) {
    $freeSpacePercent = [math]::Round(($disk.FreeSpace / $disk.Size) * 100, 2)
    
    if ($freeSpacePercent -lt 10) {
        $result = 1
        $failedDisks += $disk.DeviceID
    }
    if ($result -eq 1) {
    $resultText = "Disks with less than 10% free space: $($failedDisks -join ', ')"
    }
else {
    $resultText = "All disks have more than 10% free space"
 }
}
# Always set the active monitor result: 0 = success, 1 = failure
$Context.SetResult($result, $resultText);

WUG Powershell

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