[CentOS] Help finishing off Centos 7 RAID install

Wed Jan 9 10:30:54 UTC 2019
Gary Stainburn <gary.stainburn at ringways.co.uk>

I've just finished installing a new Bacula storeage server. Prior to doing the 
install I did some research and ended  up deciding to do the following 

6x4TB drives
/boot/efi		efi_fs	sda1
/boot/efi_copy	efi_fs	sdb1
/boot 		xfs		RAID1	sda2 sdb2 
VG			RAID6	all drives containing


1) The big problem with this is that it is dependant on sda for booting.  I 
did find an aritcle on how to set up boot loading on multiple HDD's, 
including cloning /boot/efi but I now can't find it.  Does anyone know of a 
similar article?

2) is putting SWAP in a RAID a good idea? Will it help, will it cause