Check Disk Space

Monitors disk space usage across all drives and alerts if usage exceeds threshold.

beginnerSystem Administrationdiskstoragemonitoringalerts

check-disk-space.ps1

1param(
2    [int]$ThresholdPercent = 80
3)
4
5Get-WmiObject Win32_LogicalDisk -Filter "DriveType=3" | ForEach-Object {
6    $usedPercent = [math]::Round((($_.Size - $_.FreeSpace) / $_.Size) * 100, 2)
7    $status = if ($usedPercent -ge $ThresholdPercent) { "WARNING" } else { "OK" }
8    
9    [PSCustomObject]@{
10        Drive = $_.DeviceID
11        SizeGB = [math]::Round($_.Size / 1GB, 2)
12        FreeGB = [math]::Round($_.FreeSpace / 1GB, 2)
13        UsedPercent = $usedPercent
14        Status = $status
15    }
16}

Quick Actions

Parameters

$ThresholdPercent(number)
Alert threshold percentage
Default: 80

Use Cases

•Monitor disk space on servers or workstations to prevent storage issues before they impact operations.

Details

CategorySystem Administration

Complexitybeginner

Added3/13/2026