I have two NTFS partitions that constitute a Windows 7 install. I am running Ubuntu and virtualize that Windows install off the physical disk. While the VM is working it could be disastrous if mount any of those partitions and make changes to them.

How do I prevent Ubuntu from mounting these partitions _at_all_?

Tried something along the lines of

/dev/sda none ntfs,ro 0 0 

in /etc/fstab but that just gave me an error..

Thanks!