Disk label type: gpt
Grub cannot boot from a gpt type partition table, and MSDOS style cannot handle over 2 TiB... I have a 15x300 array with the same problem, I ended up putting a 128 meg CF card on a CF to IDE adapter, and using that as /boot.
Now the machine boots with the help of LILO 22.6.1-6.2 and kernel 2.6.16-2,
I'm surprised lilo worked at all. Mike