Difference between revisions of "Virtualbox"
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= Resize disks in VirtualBox with Snapshots = | |||
It is quite straightforward to resize a disk in VirtualBox as stated here and there. It becomes tricky though if the virtual machine,aka VM, has snapshots attached. The virtual disk thus is persisted across multiple VHD files, and the old trick will generally take not effect. This is also a [https://www.virtualbox.org/ticket/9103 known bug] hanging there for more than three years. | |||
The suggested approach is to delete all snapshots and wait patiently for VirtualBox Manager to merge all the VHD files for you. It is a painfully lengthy process, so I decide to take a shortcut. | |||
# First, shutdown the VM and backup the whole virtual machine folder. | |||
# Then modify the size of all .vdi files in the root of the VM and Snapshots subdirectory. | |||
<source lang="bash"> | |||
VBoxManage modifyhd "Windows 8.1.vdi" --resize 81920 | |||
for x in Snapshots/*.vdi ; do VBoxManage modifyhd $x --resize 81920 ; done | |||
</source> | |||
Startup the VM, and you will see the unallocated space in the Disk Management utility. | |||
= Resize .vdi disk on Windows = | = Resize .vdi disk on Windows = | ||
cd "C:\Program Files\Oracle\VirtualBox" | cd "C:\Program Files\Oracle\VirtualBox" | ||
Revision as of 10:04, 18 June 2018
Resize disks in VirtualBox with Snapshots
It is quite straightforward to resize a disk in VirtualBox as stated here and there. It becomes tricky though if the virtual machine,aka VM, has snapshots attached. The virtual disk thus is persisted across multiple VHD files, and the old trick will generally take not effect. This is also a known bug hanging there for more than three years.
The suggested approach is to delete all snapshots and wait patiently for VirtualBox Manager to merge all the VHD files for you. It is a painfully lengthy process, so I decide to take a shortcut.
- First, shutdown the VM and backup the whole virtual machine folder.
- Then modify the size of all .vdi files in the root of the VM and Snapshots subdirectory.
VBoxManage modifyhd "Windows 8.1.vdi" --resize 81920 for x in Snapshots/*.vdi ; do VBoxManage modifyhd $x --resize 81920 ; done
Startup the VM, and you will see the unallocated space in the Disk Management utility.
Resize .vdi disk on Windows
cd "C:\Program Files\Oracle\VirtualBox" VBoxManage.exe modifyhd "C:\Users\piotr\VirtualBox VMs\vm-ubuntu64\vm-ubuntu64.vdi" --resize 20480
Note it also can resize VHD (Hyper-V) file formats.
Generalize Windows
If you wish to re use your Windows VM image it needs to be generalized:
C:\Windows\System32\Sysprep sysprep.exe /oobe /generalize /shutdown /mode:vm