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Virtualbox Increase Disk Size How to Resize a VirtualBox Linux VDI Disk under Windows Host

I usually set a big amount of space for my VMs, but this time I created an Ubuntu VM with just 15GB of dynamic allocated space. I wanted to use it "just to test stuff" and I knew I would probably make a mess and that VM won´t last much. But, all things went more than great and I ended up using it as my "prod" environment for now, this is were the guest started to complain about the limited space left, I did a quick search in Google and I got the following:

  1. Shutdown your VM
  2. Make a copy of you VDI, you can just ctrl+c, ctrl+v
  3. VirtualBox comes with an utility called VBoxManage.exe which is usually located at "c:\Program Files\Oracle\VirtualBox\VBoxManage.exe"
  4. To modify the size of your VDI to 25GB execute the following command:

C:\path\of\your\vdifile\"c:\Program Files\Oracle\VirtualBox\VBoxManage.exe" modifyhd yourvdifilename.vdi --resize 25000



Start your guest VM and in my case it registered the new space automatically but if your guest didn´t you can follow the instructions detailed here:

Props to derekmolloy from where I took this information

Discussion (2)

arnolde profile image
Ethan Arnold

Before anyone else blindly follows these instructions which are really easy... In most cases you actually do need to use a partition manager to enlargen the partition, as described on the derekmolloy page.

greatvovan profile image

Works on Macs as well.