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UUID on VM VMWARE

Posted on 2012-03-19
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Last Modified: 2012-03-19
We use a template to deploy VMs. The VMs are normally Windows 2008 R2 Data Center that have been setup and run Sysprep on and then Converted to a template and then we deploy from that Template. What we have been seeing is duplicate UUID's on the VMDK. Is there a way to avoid this happening or do we just need to change the UUID each time we deploy a VM.  

VMware ESX 4.1
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Question by:RickEpnet
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7 Comments
 
LVL 121
ID: 37738938
The UUID is automatically generated when a VM is first powered on or moved, with the UUID value being based on the physical host’s identifier and also the path to the VM’s configuration (vmx) file.  Within this configuration file the UUID value is stored in two places:

    uuid.bios
    uuid.location (hash based on the current path of the VM)
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LVL 14

Author Comment

by:RickEpnet
ID: 37738980
So are you say we just need to go in and change the UUID each time we deploy a new VM from that template?
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LVL 121
ID: 37738993
is this causing you an issue?

you got identical UUIDs in the VMDK or VMX?
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LVL 14

Author Comment

by:RickEpnet
ID: 37739043
Yes it is.

When the backup software tries to backup 2 VMs with the same UUID on the VMDK at the same time it throws and error.
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LVL 30

Expert Comment

by:IanTh
ID: 37739148
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LVL 14

Author Comment

by:RickEpnet
ID: 37739529
It would be just as easy to generate new UUID for each disk as doing that each time. Also when you deploy it from a template it does not ask if you have copied or moved.
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LVL 121

Accepted Solution

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Andrew Hancock (VMware vExpert / EE MVE^2) earned 500 total points
ID: 37739565
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