I'm trying to install Ubuntu 12-LTS on a Dell T610 server with a PERC H700, RAID1 & RAID5 configuration. I'm installing on the RAID-1; everything goes well until I reboot and the server simply does not find the boot record to proceed. I've used a live CD to make sure the partition /sda /sda1 is flagged as bootable & partition 1 is the active partition. I've also tried removing all signs of GPT to make sure grub is not getting confused. At this point I'm not sure of the direction I need to go. Anyone run into this and figure out how to resolve?