Is the drive modified? If yes, what fw is it?
Also, no warranty? If it's a slim it shouldn't be more than 1-1.5 years old. I believe they have like a 2 year warranty -- well at least here they do.
If it is, and you're not sending it in because of the modified fw, you should still try sending it in for repair -- I've heard cases where they didn't notice and it went through.
If you're just out of warranty or whatever, then yes, I believe the drive could be changed, depending on your region there should be people that can change it or sell one to you so you can change it. That also depends on your x360s DVD model.
[img:91f1fb12c3 ]http://i.imgur.com/fTzqMvq.gif[/img]