I am creating a powershell program that is supposed to check the free Disk Space of all the drives on a computer. I have found
Get-WmiObject Win32_logicaldisk |Format-Table DeviceID, freeSpace, Size
which generates the data I want in a table.
However I am not sure how to use each specific element in formulas and other parts of the program.
Ultimately I want to check every disk on the computer to see if its more than 50% free, and emit an output accordingly.
Thanks!
Never use the Format-* cmdlets before the point at which you need to acutally format and present the data to a user.
To grab the properties of an object without formatting it, use Select-Object:
$DiskInfo = Get-WmiObject Win32_logicaldisk |Select-Object DeviceID,FreeSpace,Size
To get the percentage of free space, you could use a calculated property:
$DiskInfo = Get-WmiObject Win32_logicaldisk |Select-Object DeviceID,@{L="FreeSpacePercentage";E={100*($_.FreeSpace/$_.Size)}},FreeSpace,Size
Since Get-WmiObject Win32_LogicalDisk returns an object per disk, $DiskInfo is now an array of objects with the exact 4 properties you selected.
Iterate over the array with a loop or the ForEach-Object cmdlet and output accordingly:
$DiskInfo |ForEach-Object {
if($_.FreeSpacePercentage -gt 50){
Write-Host "There's more than 50% free disk space on drive $($_.DeviceID)"
}
}
Try this
Get-WmiObject Win32_Volume -computername $env:computername |
Select-Object DriveType, @{Name="Size(GB)";Expression={"{0:N1}" -f($_.Capacity/1gb)}},@{Name="FreeSpace(GB)";Expression={"{0:N1}" -f($_.freespace/1gb)}},@{Name="FreeSpacePerCent";Expression={"{0:N0}" -f(100*$_.freespace/$_.capacity)}} |
Where-Object -FilterScript {[decimal]$_.FreeSpacePerCent -gt 50 -and $_.drivetype -eq 3} |
Sort-Object -property "FreeSpacePerCent"
Format-Table
