QUOTE(xboxmods2977 @ Nov 5 2010, 02:48 AM)

Yes, It's possible but you have free space so that isn't the problem. Try a different game disc or, if you can, try a different DVD-ROM drive from another xbox.
EDIT: Just to confirm, you are using UnleashX as your dash, correct?
yes.
I deleted the cache folder in E:, as well as everything in X,Y and Z