PVS Collection vDisk Update

#Requires -Version 4.0
<#
Written by David Ott
This script is to run on a Provisioning server running v7.12+ (might work on lower, but tested on 7.12).
Use this for reference and installing the pvs module if needed:
https://docs.citrix.com/content/dam/docs/en-us/provisioning-services/7-12/downloads/PvsSnapInCommands_7_12.pdf
Search for and pay attention to any comments marked with #####
#>
##### Function that checks with the delivery controller, and reboots the pvs machine if there is no session
function check($m) {
##### Make sure you have powershell remoting enabled on your delivery controller
$return = Invoke-Command -ComputerName $deliverycontroller -ScriptBlock {
$c = $args[0]
asnp citrix*
$comp = get-brokerdesktop -machinename "*$c"
if ($comp.SummaryState -ne "InUse") {
"Restarting "+$comp.machinename
Get-BrokerMachine -MachineName "*$c" | New-BrokerHostingPowerAction -Action Restart | Out-Null
} else {
"Unable to restart "+$comp.machinename+" due to active session(s)"
}
} -ArgumentList $m
$return
}
##### Script starts here!
##### load the PVS module
ipmo 'C:\Program Files\Citrix\Provisioning Services Console\Citrix.PVS.SnapIn.dll'
$deliverycontroller = "deliverycontrollername" ##### put your delivery controller name between the quotes
$collections = Get-PvsCollection | select CollectionName,CollectionId
##### Will output to out-gridview for selection - select the collection and hit ok
$selectedcollection = $collections | Out-GridView -OutputMode Single -Title "Select the Collection you want to update"
if (!($selectedcollection)) {break} ##### ends if you don't select a collection
$devices = Get-PvsDeviceInfo -CollectionId $selectedcollection.CollectionId | ?{$_.active -eq $true -and $_.DiskVersionAccess -ne "1"} | select DeviceName,DiskLocatorId,DiskFileName | sort DeviceName <##### get devices in the collection
which are powered on, and not allowed to access the maintenance version of vdisks #####>

<##### runs through each device in the collection.  checks for the latest production (or override) version of the vdisk
if the device is not running the latest version of the vdisk (or override) it will pass the computer name to the "check" function
#####>
foreach ($device in $devices) {
$diskver = Get-PvsDiskVersion -DiskLocatorId $device.DiskLocatorId | ?{$_.CanPromote -eq $false} | select version,DiskFileName,CanOverride
if ($diskver.canoverride -contains $false) {
$latest = ($diskver | ?{$_.canoverride -eq $false}).diskfilename
} else {
$latest = ($diskver | ?{$_.version -eq ($diskver.version | measure -Maximum).maximum}).diskfilename
}
if ($device.DiskFileName -ne $latest) {
$message = $device.DeviceName+" is not using the latest vDisk version!  Checking for active session."
Write-Host $message -f Red
check -m $device.DeviceName
} else {
$message = $device.DeviceName+" is on the latest vdisk version"
Write-Host $message -f Green
}
}