SBUU may not help you install Linux - the Linux distro must be certified by Dell for SBUU to assist you with its install.  So, you VERIFIED that the SBUU DVD is bootable and works on another system? Have you tried booting to a CD (not a DVD) on this server?  DVD drives were optional on these servers, not standard. There is also the possibility that the drive is faulty.
Problem:Can't boot off bootable (verified) DVD Tried:Updated BIOS to 2.7.0Changed settings in BIOS boot only off DVDROMBurned ISO "cdu_1.6_core_173_a01.iso" from  Dell System Build Update Utility (bootable) Checked RAID configuration: PERC 5/i to RAID 1 StoryI can boot to the default OS but I can't boot from DVD so I can install Linux. Any advice? 
Dell PowerEdge 1950 Can't boot off DVD Drive