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Starting VM with a virtual disk missing

infradatel
infradatel asked
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Last Modified: 2012-05-12
I have an ESXi host with local disk storage and also a NAS attached. All of the VMs have their virtual disks on the local storage. I want to create a virtual disk on teh NAS and attach it to a VM for backups. If the NAS is switched off and the VM is restarted it obvioulsy will not see the virtual disk on the NAS, but will this prevent the VM from starting?

Also would a lack of Video Ram prevent a VM from starting
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Top Expert 2010

Commented:
No; only a detached SYSTEM VOLUME virtual disk would prevent it from booting up.

~coolsport00
Top Expert 2010

Commented:
And, the VM will boot as long as there is enough physical RAM on the host to boot the VM. Nothing to do with video RAM...

~coolsport00
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Commented:
If you have a virtual machine, with virtual disks on a missing datastore [your NAS is OFF], the Virtual Machine will not start and it will fail with an error message. Please see below

Virtual Disk Error
ALL Virtual Disks must be available to a virtual machine, on ALL datastores for the Virtual Machine to start. In the example above, I've pulled the iSCSI SAN (StarWind VSA cables out, so the datastore is no longer available to a DC, this is the 2nd hard disk attached to the DC, not the OS Boot Disk, as you can see VM fails to start!).

It's not a good idea, to Up and Down storage datastores.

Lack of Video RAM will not prevent it from starting, it will give an error in the logs, and you may not be able to select a higher resolution.
Andrew Hancock (VMware vExpert / EE Fellow)VMware and Virtualization Consultant
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Commented:
So the answer, Yes it will prevent the VM from restarting.
Top Expert 2010

Commented:
Thanks for the correction @hanccocka; thought I've booted without before. I think that may have been RDMs I was using & not virt disks.

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Commented:
Thanks for the response guys

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