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Within the vSphere client, look under the Configuration, Software section. There is a sub-category called 'Virtual Machine Startup &amp;&nbsp;Shutdown'. <br />
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See if the VM you are referring to is listed in the Startup Order to automatically start up.<br />

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Within the vSphere client, look under the Configuration, Software section. There is a sub-category called 'Virtual Machine Startup & Shutdown'.

See if the VM you are referring to is listed in the Startup Order to automatically start up.


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There was no good solution or reason why this machine powered on.
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There was no good solution or reason why this machine powered on.

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We have 2 VMware ESX 4.0 serverrs running DRS but NOT HA. &nbsp;They are managed through vSphere server / client. &nbsp;It's a fairly standard install.<br />
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Last night, for reasons I cannot explain, one of my powered off virtual machines was powered on by the system. &nbsp;This machine has been powered off for over a month.<br />
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Can anyone explain to me what could have caused the machine to power on? &nbsp;I performed the P2V virtualization myself several weeks ago then powered off the virtual machine and left the physical machine running. &nbsp;Obviously when the VM came up last night and my physical machine was still running, that caused some problems. &nbsp;Here is a screenshot of the events for the VM. <a href="https://filedb.experts-exchange.com/incoming/2010/12_w01/384262/vm-power-on.gif" target="_blank" title="VM logs (33 KB)"><img alt="VM logs" class="file-block lazyload" style="max-width: 800px;" data-src="https://filedb.experts-exchange.com/incoming/2010/12_w01/800_384262/vm-power-on.gif" /></a>
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vm-power-on.gif

We have 2 VMware ESX 4.0 serverrs running DRS but NOT HA.  They are managed through vSphere server / client.  It's a fairly standard install.

Last night, for reasons I cannot explain, one of my powered off virtual machines was powered on by the system.  This machine has been powered off for over a month.

Can anyone explain to me what could have caused the machine to power on?  I performed the P2V virtualization myself several weeks ago then powered off the virtual machine and left the physical machine running.  Obviously when the VM came up last night and my physical machine was still running, that caused some problems.  Here is a screenshot of the events for the VM. 

Why does VMware ESX 4.0 power guests on automatically

Virtualization is the act of creating a virtual (rather than actual) version of something, including (but not limited to) a virtual computer hardware platform, operating system (OS), storage device, or computer network resources. Virtualization is usually the creation of a system that executes separate from the underlying hardware resources, or the creation of an entire desktop for systems located elsewhere, similar to thin clients.