Resize Windows 7 vdi image for VirtualBox

Some days ago I had the problem, that my windows VM in virtualbox got too small. Therefore I had to resize it. If you have no snapshots created yet for your windows virtualbox, it is quite easy to resize it. First of all you have to move into the directory where your virtualbox vdi file is located.

At my ubuntu host it is ~/VirtualBox\ VMs/windows/:

cd ~/VirtualBox\ VMs/windows/

There I have the winows.vdi and to resize it, we can use the VBoxManage command:

VBoxManage modifyhd windows.vdi --resize 50000

After that we just have to resize the disk in windows itself. Therefore we can use the really powerfull internal resize tool of windows.

To get to this utility, open up Control Panel, and type in partition into the search box.. you’ll immediately see the link show up:

Windows Disk Management

In the Disk Management screen, just right-click on the partition you want to extend, and select “Extend Volume” from the menu. And surprise, surprise the disk is extended.

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