My superdrive is broken so I bought an internal blu ray writer, Pioneer BDR205. Now I want to install Win7 on my Mac Pro, but for some reason, the blu ray drive does not boot from the Win7 dvd. There are no issues when I want to boot from a OS X installer DVD, so the no boot issue is only with Win7 DVD. The DVD is fine because my MacBook Pro boots from it without issues. When I try to boot from it on Mac Pro, the no boot disk found icon emerges. I tried booting from MacBook Pro's superdrive via target disk mode, same thing happened. Anyone has any idea why this might be happening? My Mac Pro is 2008 model 3.1.