Over the weekend, I wanted to build a guest VM quickly to show the effects of having the Integration Components installed (cf. one without) so I downloaded a Windows Vista Evaluation virtual machines from the Microsoft VHD Test Drive programme.
Unfortunately the supplied VHD only had 3GB of free disk space, so I couldn’t apply SP1 in order to install the Hyper-V integration components and, even though it was a dynamically expanding VHD, it had a maximum size set of 16GB.
That’s when I stumbled across a great tool for resizing virtual hard disk files – VHD Resizer (formerly VHD Expander). After telling it the source and destination file names, then leaving it to work it’s magic for a while, I attached the new (larger) VHD to my VM, expanded the volume in Disk Manager and was greeted with extra hard disk space.
This tool is definitely one to remember.