For RAID-1 on CentOS 7, have a look at the following: <http://binblog.info/2014/10/25/centos-7-on-md-raid-1/> It deals with the situation, including mirroring of /boot. Note that in my case, I disabled UEFI in the BIOS, so didn't have /boot/efi come up on autopartition. That URL also implies a not-stellar assessment of getting help on this list. In that particular case, the assessment was IMO accurate. ie: If you're going to answer the question, then answer the question and don't go off on a tangent. Devin