[arch-general] Adding new disks > 2T to system that boots with grub, can GPT be used for new disks?

[David C. Rankin]

All,

  I'm confused by the partitioning wiki
(https://wiki.archlinux.org/index.php/Partitioning). It says:

If using GRUB legacy as the bootloader, one must use MBR

  What about adding disks to this system? Must they be partitioned MBR or can I
use GPT on the additional disks. (I haven't used GPT before, so this has me
stumped).

  Current setup is Arch booting from grub (grub2) on 1T raid1 mdadm array. I
have a pair of 3T drives I want to add to the system. (as a 3T raid1 mdadm array).

  I want to use the entire disk in a single partition which is why I want to
partition the disks GPT (leaving 100M unpartitioned at the end).

  Can I use GPT on the new disks, or am I stuck with MBR?

-- 
David C. Rankin, J.D.,P.E.