[CentOS] Centos 7 and Software Raid Minimal Install

Wed Jun 1 17:30:00 UTC 2016
m.roth at 5-cent.us <m.roth at 5-cent.us>

Matt wrote:
> I am trying to install Centos 7 on a couple 4TB drives with software
> raid.  In the Supermicro bios I set UEFI/BIOS boot mode to legacy.  I
> am using the Centos 7 minimal install ISO flashed to a USB thumb
> drive.
> So I do custom drive layout something like this using sda and sdb.
> Create /boot as 512 MB XFS raid1 array.
> Create SWAP as 32 GB SWAP raid1 array.
> Create / on 3.xxx TB XFS raid1 array.
> I then get error.
> "Your BIOS-based system needs a special partition to boot from a GPT
> disk label.  To countinue, please create a 1MiB 'biosboot' type
> partition."
> I cannot seem to create the biosboot partition so it is mirrored to
> both drives for redundancy.  Any ideas how to do this?  I want
> everything mirrored to both drives.

Yeah, you need to create the 1M partition, preferably the first, and its
type, like ext4 or xfs or swap, is, in the dropdown, biosboot.