Clearing unused space from a virtual hard disk

If you’re using Hyper-V, and you have a dynamic virtual hard disk (VHDX), then when you delete files from it, the file size won’t shrink automatically.

A great, quick way of getting things downsized is here:


Run an administrative command prompt
Type “Diskpart” (No Quotes)
Type the following commands:
select vdisk File=”I:\path\to\your.vhd”
attach vdisk readonly
compact vdisk
detach vdisk

Silent Hyper-V

Turns out that VMs in Hyper-V can’t handle sound unless you’re using RDP.  So, if you have a sound-card in the server that you’re wanting to use, you can’t access it.


So, I’m turning back to VMWare.

Remote permissions in Hyper-V

Continuing the journey towards Hyper-V server, I’ve found some tricky challenges with remote management of the server from a Windows 8 PC when said PC is not on a domain, but is in a workgroup.

This site has the answer I needed – in essence, enabling the anonymous user on the client and then changing some firewall rules on the server. I actually couldn’t get the Firewall snap-in to work, but continuing to issue commands in text worked for me.

Also, this site has 12 steps for remote management: