Fumanchu on 28 April 2009
| MikeB said: A summary from my perspective based on discussions. Early XBox 360 drives were slower 12x drives, later 360 drives are faster and 16x drives are in use on the 360 today. The inner most part of a 360 needs to be dual layer, is read first and includes video files and other stuff. The drive rotation speed remains constant across reading discs, thus data at the outer part of the disc is read faster than the inner parts. 360 games are thus optimised to place read speed critical data at the outer part of the disc (but thus involves higher seektimes and more layer switching, as normally a disc is read from the inner parts towards outer parts). There are many early XBox 360 games which only use a single layer for game data storage, this as layer switches (these delays are different from normal seek times involved with lens movement) aren't involved, thus single layer game data can be read faster. Games on dual layer discs read data slower due to these layer switches. Generating an image file most likely just involves one layer switch, layer 1 is read and copied then layer 2. This is different from game data reading which involves lots of layer switching. |
Apart from just saying it what concrete information do you have that they're 12x SL drives?
I've seen this disputed - do you have any sources that claim this? I mean apart from 3.4GB install sizes, which doesn't mean the disc uses DVD-5.
I'd love for you to prove everyone wrong but we need something more substantial than 'because I said so'...what I'm asking in case it wasn't clear before is can you provide any proof to your claims?
