I'm really at a loss. I had 5.11 running on this machine, from this physical boot disk, until I stepped on /bin the other day. I've tried installing Centos 5.10 and 5.11 to this Seagate 1TB drive. Both installs run perfectly, but when I try to reboot, grub says Filesystem type unknown, partition type 0xee googling this indicates that the disk has a GUID partition table. This must have been done by the installer??? If so, why doesn't it get the boot loader set up correctly? Sigh, So stage two of the saga, I thought I would try to install CentOS 6.5 (I had the dvds burned already). It boots, but claims the install image is corrupt. I re-downloaded CentOS 6.6, verified the checksums and burned a new dvd set. it boots, but when I test the media, it says the same thing (install image has errors). If I try to skip media checks, it just ejects the disk and says insert the CentOS disk. I burned a new set of disks, identical behavior. I downloaded from a completely different mirror, validated checksums and burned new disks. I get identical behavior. I'm not sure what to do next, but I need to get this machine back up and running. I'm thinking of getting a different boot disk to install 5.11 to. I have no idea why CentOS 6.6 refuses to install. -chuck --