See NJ5's previous posts, 6.8Gb isn't the total physical space on the DVD but Microsoft adds some DRM and other stuff that leaves developers 6.8Gb left for game data.

Hmm than why is Resident Evil 5 7.3 GB?

I assume you mean when installed which leaves us with 2 theories:

1. It's compressed on DVD but not after installation

2. Microsoft have increased the amount of DVD space available to developers by reducing the DRM stuff.

Both are possible as the presentation that said 6.8Gb available was quite a while ago.

1. No, the size of the disk is 7.3 GB. Not installed.

2. Probable what has happened. But dosen't that make this whole argument void?

There's only some developers that require mandatory install of their games.

The biggest culprit being CapCom and Take Two ( DMC4, Re5, GTA4, Bioshock).

Games like Burnout Paradise, Cod:Waw, Mirror Edge, Deadspace have virtually no install and no wait time during loading either....( and the same thing is true of every Sony first party game). 

i'm aware of the a dvd's physical capacity, and the space used by microsoft for security, and i'm still saying it's not capped at 6.8gb.

MikeB: I like how you get the technical details wrong or omit them entirely in almost every one of your posts.

size of a game doesnt make it a good game just to let you know.....

Thanks MikeB I appreciate the information. It's interesting. I had no idea MS packed so much extra junk onto their discs. Continue with the good work. I like your technical posts :)

I just checked the charts, it's 6.8 GB.