My computer froze while i was in the middle of erasing a dvd-rw, so after i rebooted i tried to finish erasing the disk, however windows says there is no disk in the drive. I've tried using nero, alcohol 120%, and burn at once, but they all will not start erasing the disk because they think there is no disk in the drive. I've also set alcohol 12% to ignore illegal table of contents but it refuses to erase the disk. Is the disk fucked or can some software force erase the disk?