So our clients have RDS deployment, WVD deployments, and just in general VDI-like environments. To make sure their profile can be loaded on each machine without having to set everything up again we use UPDs.

Of course these UDP’s have a maximum size defined and need to be monitored, you can monitor the location where you host your UDP’s but that is not enough. The disk could reach a maximum size without running out of disk space on the shared location.

You can use the following script to monitor the RDS UPD size, measured against the disks own maximum size. This script only works for disks that are currently mounted – So the user has be logged in to monitor the disk size.

UPD Monitor script

$DisksInWarning = @()
$VHDS = get-disk | Where-Object {$_.Location -match "VHD"}
foreach($VHD in $VHDS){
$Volume = $VHD | Get-Partition | Get-Volume
if($Volume.SizeRemaining -lt $volume.Size * 0.10 ){ $DisksInWarning += "$($Volume.friendlyname) Less than 10% remaining"}
}

This script will alert when we have less than 10% available. Now the downside of using this script is that it only states the friendly name of the disk that is in warning. In the case of UPDs this is often a long SID or a generic name. So to make sure this is actually useful we’re also going to retrieve the SID of the users, and translate these to the username.

$DisksInWarning = @()
$VHDS = get-disk | Where-Object {$_.Location -match "VHD"}
foreach($VHD in $VHDS){
$FilePath = [io.path]::GetFileNameWithoutExtension("$($VHD.Location)")
$SIDObject = New-Object System.Security.Principal.SecurityIdentifier ($FilePath) 
$Username = $SIDObject.Translate([System.Security.Principal.NTAccount])
$Volume = $VHD | Get-Partition | Get-Volume
if($Volume.SizeRemaining -lt $volume.Size * 0.10 ){ $DisksInWarning += "$($Username.Value) UPD Less than 10% remaining. Path: $($VHD.Location)"}
}

And that’s it! as always, Happy PowerShelling!