Are you plagued by that need for five 9's and have an Oracle RAC VM? Can't spare the time to shut down that VM? You don't need the Bass-o-matic 76 just the following to allow you to alter Change Block Tracking with an online VM. (Though a Bass-o-matic is highly recommended).

Just fetch your friendly PowerCLI interface to VMWare and connect to your friendly neighborhood vCenter:

$vm="VM_Name"

$vmtest = Get-vm $vm| get-view $vmConfigSpec = New-Object VMware.Vim.VirtualMachineConfigSpec

disable ctk

$vmConfigSpec.changeTrackingEnabled = $false $vmtest.reconfigVM($vmConfigSpec) $snap=New-Snapshot $vm -Name "Disable CBT" $snap | Remove-Snapshot -confirm:$false

enable ctk

$vmConfigSpec.changeTrackingEnabled = $true $vmtest.reconfigVM($vmConfigSpec) $snap=New-Snapshot $vm -Name "Enable CBT" $snap | Remove-Snapshot -confirm:$false

That's good Bass