The other day when playing Just Cause 2 on the new xbox 360 slim I had a disk read error. The disk is in near mint condition and has only ever been in the case or in the console.

After trying the game disk again in the machine, I get the same error but the console freezes. After this the console will not start up whilst there is a disk in the drive.

Go into memory settings and it says that the hard drive is unformatted. So I reformat losing all my save games and profiles.

My question is, what was the likely cause of this? Is it a console fault? Now I am reluctant to start any new saves in the likelihood that this happens again.