Blog: Change UUID of Virtual Drive (VDI) in VirtualBox

I often need to spin up multiple instances of the same OS snapshot in VirtualBox. If you simply make a copy of an existing virtual drive (.vdi) file and then try to add it to your virtual media manager it will complain that a harddisk with the same UUID already exists.

A hard disk with UUID {xxx} ... is already registered.

In order to reset the UUID on your new disk, I use the following command:

C:\>"Program Files\Sun\VirtualBox\VBoxManage" internalcommands sethduuid e:\win_7_office2007_CLEAN\win_7_trash.vdi


VirtualBox Command Line Management Interface Version 3.0.10
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UUID changed to: 32475885-c5cf-4560-8ffa-dcc2a9a74ee3
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