Hi there. I have a question about certain agmes I've installed to my HDD. Halo 4, and Halo: Combat Evolved Anniversary. I've noticed when I play them, judging from the sound, the Xbox still reads them from the disc for a little bit before quieting down and - assume - reading them from memory. However, some of my other games are just read from memory straight away, like Halo: Reach and CoD: WaW. Is this normal for some games that it takes a little time to start reading them from memory?