Hello,

On 10/01/2014 06:33 PM, Wilson, Jonathan wrote:

From what I can tell with UEFI I need to set up a UEFI partition with a
FAT format.

On my current BIOS system I have a Biosboot 1M, /boot Raid1 200M and /
Raid 1 40G.

Obviously Grub installs to the mbr, and then installs a bit into
Biosboot which can read raids, hence it can read and boot from /boot.

Further, from what I can tell, into the UEFI partition can go either a
kernel & initramfs with UEFI support, or a "loader" that then loads the
kernel.

What I am unsure about are... 

1)  Can the loader/kernel understand md raid? so the / can be in a bog
standard raid1 v1.2?

2) I'm guessing I would no longer need the /boot as that would be
replaced by what ever was in the UEFI partition?

3) as my "/boot" is currently in a raid 1 my life is simple, should any
changes occur they are replicated to the drives I have set up as /boot
raid 1, and I installed the mbr portion of boot loader manually on each
disk and tested pulling one, and then booting from another.. it
worked :-)
So I would like to keep things, if not simple, at least less likely to
have problems because I forgot to install duplicates of the UEFI on all
the disks... so can I use a .90v raid1 on the UEFI partition, then
format it as fat... so that all copies of what ever is in the UEFI
partition are replicated across the multiple raid1 disks, instead of
having to remember to copy what ever is in there manually to ach disk?

There was already a post on that subject you can find here:
http://comments.gmane.org/gmane.linux.raid/45611

It might answer some of your questions.

Bye.