Well, I am still with that problem, attempting to create shared folders, so I will try to be more specific and then maybe somebody can help me. When I say "I am trying to set up shared folders", I mean that I set this configuration in my XML description: <filesystem type='template' accessmode='mapped'> <source name='/home/guilhermesgb/Desktop/SharedFolder/> <target dir='/home/tarciso/Desktop/SharedFolder'/> </filesystem> This was my last attempt. I also tried all other combinations, with accessmodes "passthrough" and "squash", for filesystem type "mount" too. I can't send you any error messages neither printscreens because my problem is that anything happens, the domain is started properly but no shared folder is specified so I can mount it, using command "sudo mount -t vboxsf SharedFolder /home/tarciso/Desktop/SharedFolder". I always get a protocol error. I was expecting libvirt to automatically do this step for me, so I wouldn't need to do it manually through vbox GUI or VBoxManage. During my searches through the web, I found this other option, although I can't be sure if it is implemented, as the libvirt website says nothing about it: defining an XML file with this configuration: <shareddir fstype="ext4" path="/home/guilhermesgb/Desktop/SharedFolder" mount_tag="SharingName" security_model="passthrough" /> And then mounting it with proper command (the same as before, now with the mount_tag specified: "sudo mount -t vboxsf SharingName /home/tarciso/Desktop/SharedFolder" . Unfortunatelly the same error persists. Am I missing something? Sorry if my first message was hard to understand. Thanks. <div class="gmail_quote">2011/6/1 Guilherme Santos <<a href="mailto:guisgb13@gmail.com">guisgb13@gmail.com</a>> <blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">Good afternoon. I am having trouble trying to set up shared folders in the guest VM using VirtualBox hypervisor. No matter what configuration is defined in my XML, it never works, I mean, no shared folder is added/specifyed, then, inside the guest, when I try to mount the folder, I always get a protocol error. If I use VirtualBoxManage, I can add/specify shared folders easily and mount it with no problem. I need to use libvirt in order to deal, in a generalized way, with the process of creating shared folders in all hypervisors supported by libvirt, otherwise my problem would be solved already. I must not use specific commands of a certain hypervisor (such as VirtualBoxManage's). How does libvirt allow me to set up shared folders? Does it use VirtualBoxManage for VBox hypervisors? If so, how do I use it? I've read the documentation and followed it in defining my XMLs. Thanks anyway! -- Guilherme Santos G. Baptista Undergraduate in Computer Science at UFCG LSD - Distributed Systems Laboratory </blockquote></div> -- Guilherme Santos G. Baptista Graduando em Ciência da Computação pela UFCG LSD - Laboratório de Sistemas Distribuídos