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Editorial Team
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Asked: 2026-05-25T12:41:15+00:00

I have a small Powershell script that is used to shut down my virtual

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I have a small Powershell script that is used to shut down my virtual machines in event of an extended power outage. It takes a specific VM object and forces a shutdown.

Function DirtyShutdown
{ param([VMware.VimAutomation.ViCore.Impl.V1.Inventory.VirtualMachineImpl]$VM )
$VM | Stop-VM -Confirm:$false
}

I would like to speed up this process using the start-job command to run all these tasks in parallel. I have tried using several variants including the following which I believe to be correct. 

Start-Job -InputObject $VM -ScriptBlock{ $input | Shutdown-VMGuest -Confirm:$false }

Based on the Receive-Job output it appears the problem is the snap in in use (added before the above function is called) is not loaded in the context of Start-Job.

What is the correct syntax to make this happen?

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1 Answer

  1. Editorial Team

    While I appreciate the desire to use PowerShell v2’s job subsystem for this task, note that vCenter has a built-in job system which you can take advantage of here. Most PowerCLI cmdlets which perform a change to your environment have a RunAsync parameter. To know which ones, run this piece of PowerShell code:

    get-help * -parameter runasync

    The RunAsync parameter will take your command(s) and queue them up in vCenter. The cmdlet will return a task object and then immediately return control back to your script.

    To turn this into an answer in your case, simply append “-runasync” to the end of your Stop-VM command, like so:

    $VM | Stop-VM -Confirm:$false -RunAsync
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