I forget right now it it's + or - (it's burning right now), but anyways: I just burned something to a DVD RW (I had nothing else available). I never want that DVD to be erased, and though it's very unlikely someone will erase it, I want to be sure. How do I lock this DVD? Can I use Disk Utility or do I need something special? Thanks EDIT: It's a Fujifilm 2x DVD-RW Single Layer (4.7 GB).