PowerCLI enable CBT

PowerCLI enable CBT on VM’s where CBT is disabled

Problem: Some VM’s have CBT disabled.

Warning: Maybe CBT should not be enabled in your environment. There are pre-requisites and if unpatched hosts, potential bugs with CBT. Please be diligent in researching CBT (Change Block Tracking) first.

Solution: (note: bypasses any VM's with existing snapshots)

	$vcenter="vcenter.domain.tld"
	Import-Module -Global VMware.VimAutomation.Core
	Disconnect-VIServer * -Confirm:$false -Force | Out-Null #Disconnect all previously connected vcenter servers
	# new spec
	$vmConfigSpec = New-Object VMware.Vim.VirtualMachineConfigSpec
	# enable ctk
	$vmConfigSpec.changeTrackingEnabled = $true
	clear
	connect-viserver $vcenter
	write-host
	$targets = Get-VM | where {-not $_.ExtensionData.Snapshot} | Where-Object {$_.ExtensionData.Config.ChangeTrackingEnabled -eq $false}
	if ($targets) {
	ForEach ($target in $targets) {
	$vm = $target.Name
	$vmview=get-vm $target | Get-View
	write-host "enabling CBT for $vm"
	$vmview.reconfigVM($vmConfigSpec)
	$snap=New-Snapshot $vm -Name "Enable CBT"
	$snap | Remove-Snapshot -confirm:$false
	}
	} else { write-host "nothing to do." }
	Disconnect-VIServer $vcenter -Confirm:$false -Force

view raw enable_CBT_on_VMs_where_CBT_notEnabled.ps1 hosted with ❤ by GitHub

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