w/ my xbox 360 Halo 3 edition i put in a game and when i took it out i found a...

[Shellyann V]

...circular scratch on it what can i played w/ it i once be4 & on the 2nd time it started to make this grinding noise

 

[Donut]

this is a common fault you either can A) take it back to the retailer and they should swap it for a new one or B) go on xbox live site and get replacement disk form buttt costs you about £10