Common Issues and Troubleshooting
This page lists some common issues people run into with Vagrant and Hyper-V as well as solutions for those issues.
A handy way to figure out what disks are attached (or not attached) to your guest is to open up the Hyper-V GUI and select the guest. When selecting a guest on the GUI, it should open more information about the guest, including storage information. Here you should see a list of disks attached to your guest.
Due to how Hyper-V works, you must reload your guest for any disk config changes
to be applied. So if you update your Vagrantfile to update or even remove disks, make
vagrant reload your guests for these changes to be applied.