Help finishing off Centos 7 RAID install

[Gary Stainburn <gary.stainburn@xxxxxxxxxxxxxx>]

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 
config.

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

Questions:

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 
problems? 
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