If everything worked, you should see a message saying “UUID change to: …” and then the VirtualBox should work. The host OS (the one that is running VirtualBox) is Windows 7 and the guest OS that I wish to re-size is Ubuntu. In this example I am using VirtualBox 4.2.6 (The approach is valid with more recent versions also). VBOXMANAGE.EXE internalcommands sethduuid “pathtovhdfile” Anyway, here are the current steps to re-size a VirtualBox disk, where Linux is the guest OS and Windows is the host OS. Now type in the following command ( or copy/paste using right click): And the Step I was missing: Use the description from the link to manage the disk within centos. Use GParted to assign the new unallocated space. If you put it in the default the command is this: I found the answer myself, explained here: So the Steps to enlarge your virtualbox disk for a centos guest are: Use VBoxManage utility to resize the disk. Now change the cmd prompt’s directory to the folder you installed VirtualBox in. In both Windows 8 and Windows 7, it can be found by typing “cmd” into the Start Menu search box. To fix this, you’ll need to run some text commands. Oracle has a chapter in the VirtualBox manual that covers UUID problems, which may reveal how to fix this. Since 4.0.0, you can use VBoxManage modifyhd -resize to resize the max size of the VDI. Another method is to use CloneVDI by mpack and clone the VDI with a larger size, then resize the partition(s) with Gparted. “Failed to open the hard disk E:\VirtualBox VMs\Windows 8 \Windows 8 Enterprise2.vhd.Ĭannot register the hard disk ‘E:\VirtualBox VMs\Windows 8 \Windows 8 Enterprise2.vhd’ You can use tools like CloneZilla to clone the virtual hard drive to the bigger one and Gparted to increase the partition size.
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