Note that in some distributions <code>/dev</code> is mounted on <code>tmpfs</code> — this will not work in case of static <code>/dev</code>. So what you need to do is find out where <code>/dev</code> is being mounted on <code>tmpfs</code> and remove this. This is highly distribution-dependent; please add info for your distro here.

After you made sure your <code>/dev</code> is static, populate it with needed device nodes.