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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

Top comments (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.