360 DVD data limit is 6.8 GB

[NJ5]

MikeB said:

@ NJ5

Yes, 360 games are optimised like that. But as you move away from the outer edge of the disc, repositioning the lens back towards the edge will increase seektimes.

Like it could make perfect sense on the PS3 to have the main executeable on the harddrive, it makes sense to have this at the outer edge of the 360 DVD for fast game bootup. Streaming is far more of an issue though, it requires a lot of planning, so often developers stick to minimal read speeds instead (the capacity on disc isn't that big neither, so reading faster may not be needed as it's not the main bottleneck).

Everything regarding to read speeds (and clarifications regarding storage space) I aimed to address here:
http://www.vgchartz.com/forum/post.php?id=2002828

But those speeds you quoted are probably for the whole disc. If 360 games have the 6.8 GB always on the outer part of the disc, the lower speeds will never happen, increasing the average speed.