Test whether it's possible to use virtual USB device in VirtualBox Open Source Edition

A user claims that it is possible to have support for USB devices and even mount a Persistent Volume with Virtualbox.

User says that from the graphic interface it is not possible, but from the command line it can be done like this:

VBoxManage internalcommands createrawvmdk -filename C:\usb.vmdk -rawdisk \\.\PhysicalDrive’$Number of USB in Windows drives’

If this is true, we should update our documentation accordingly, as we
currently claim this is not possible. It would be great to test it on Linux, too.

Original created by @emmapeel on 9751 (Redmine)