Super User is a question and answer site for computer enthusiasts and power users. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I run Windows 7 inside VirtualBox.

I resized the disk of Windows 7 from 25 GB to 50 GB:

VBoxManage modifyhd Windows\ 7\ Pro.vdi --resize 50000

VirtualBox size

PROBLEM: I can' grow the partition, neither with Windows 7 itself nor with GParted:

Disk management


It looks like VirtualBox does not tell the client OS about the new size.
What additional step is necessary?

share|improve this question
there shouldn't be anything else required, although I have had better luck with gparted than right in windows. does your VM with that disk have any snapshots? resizing does not support disks with snapshots. – Ryan_S Sep 17 '12 at 21:12
up vote 15 down vote accepted

You can only resize disks if they are not part of a VM that uses snapshots.

If you are using snapshots, you can easily clone the state to a new VM and hard disk, and resize that one. VirtualBox 4 now supports cloning from the GUI, so it's super easy.

VBoxManage - modifyhd

Here's a helpful walk through of the whole process, Resize and Expand a Virtualbox Hard Drive and Media in 4 Steps

share|improve this answer

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .