Greetings, I have a system x3100 m4 system with 64GB SSD for OS and 2x2tb for data as MD device (software RAID). It had Fedora 17 with EFI/ I tried to install centos 6. deleting the existing partitions on the SSD /dev/sdc. sda and sdb are the 2x2tb md device mounted on /home. no joy. googling Questions: 1. Where do I locate the boot loader? /dev/sdc? is MBR (the default with Centos) enough 2. Is it necessary to have GPT label and EFI on /dev/sdc? 3. Will it affect in anyway sda and sdb (I am not choosing to format them)? any pointers with information to wrap my head around FC17 was running fine after I fsck-ed the /dev/sdc4 which had vanished when this box came in. To my knowlege, a root file system of size 64GB should be handled peacefully by centos. GPT comes into picture only on > 2tb partitions for different mountpoints. or is it that any system mounting more than 2tb disk as non-root will necessarily need a boot disk with a GPT label and EFI partition? Am I right or have I got it all wrong? Any reply and pointers appreciated. Thanks in advance, -- Regards, Rajagopal