Resizing a VirtualBox VDI image / hard disk

I´m using Sun´s VirtualBox for a while to host multiple Operating Systems on my machine. I discovered that it is not possible to re-size fixed disk images without doing a completely fresh install of that virtual machine. I found a quite helpful post at Nick Heppelston´s BizTalk Blog to solve this problem.

I found this fascinating quote today:

In my previous post I extolled the virtues of Sun’s desktop virtualisation software, VirtualBox. One thing niggled me though – I couldn’t easily expand a Virtual Disk Image (VDI) and was regularly reaching the space limits of the modest 20Gb disks I was creating; I needed an easy way of expanding disks before I could use it as my main virtualisation platform and felt comfortable in recommending it to my, Nick Heppleston’s BizTalk Blog, Dec 2009

You should read the whole article.